Airworthiness Directives; The Cessna Aircraft Company Models 208 and 208B Airplanes

[Federal Register Volume 71, Number 51 (Thursday, March 16, 2006)]
[Rules and Regulations]
[Pages 13533-13538]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 06-2544]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2006-23648; Directorate Identifier 2006-CE-07-AD; 
Amendment 39-14514; AD 2006-06-06]
RIN 2120-AA64


Airworthiness Directives; The Cessna Aircraft Company Models 208 
and 208B Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule; request for comments.

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SUMMARY: The FAA is adopting a new airworthiness directive (AD) to 
supersede AD 2005-07-01, which applies to all The Cessna Aircraft 
Company (Cessna) Models 208 and 208B airplanes. AD 2005-07-01 currently 
requires you to incorporate information into the applicable section of 
the Airplane Flight Manual (AFM). This AD is the result of several 
accidents/incidents with the affected airplanes during operations in 
icing conditions, FAA evaluation of Cessna flight test data, Cessna 
issuing AFM revisions, and FAA determining these revisions are 
necessary for safe operation. Consequently, this AD updates the actions 
of AD 2005-07-01 that require incorporation of text in the AFM and 
requires the insertion of new text in the AFM, and the fabrication and 
installation of placards. We are issuing this AD to assure that the 
pilot has enough information to prevent loss of control of the airplane 
while in-flight during icing conditions.

DATES: This AD becomes effective on March 24, 2006.
    We must receive any comments on this AD by May 22, 2006.

ADDRESSES: Use one of the following to submit comments on this AD:
    <bullet> DOT Docket Web site: Go to http://dms.dot.gov and follow 
the instructions for sending your comments electronically.
    <bullet> Government-wide rulemaking Web site: Go to http://www.regulations.gov and follow the instructions for sending your 
comments electronically.
    <bullet> Mail: Docket Management Facility; U.S. Department of 
Transportation, 400 Seventh Street, SW., Nassif Building, Room PL-401, 
Washington, DC 20590-001.
    <bullet> Fax: 1-202-493-2251.
    <bullet> Hand Delivery: Room PL-401 on the plaza level of the 
Nassif Building, 400 Seventh Street, SW., Washington, DC, between 9 
a.m. and 5 p.m., Monday through Friday, except Federal holidays.
    To get the service information identified in this proposed AD, 
contact The Cessna Aircraft Company, Product Support, P.O. Box 7706, 
Wichita, Kansas 67277-7706; telephone: (316) 517-5800; facsimile: (316) 
942-9006.
    To view the comments to this AD, go to http://dms.dot.gov. The 
docket number is FAA-2006-23648; Directorate Identifier 2006-CE-07-AD.

FOR FURTHER INFORMATION CONTACT: Robert P. Busto, Aerospace Engineer, 
Wichita Aircraft Certification Office, FAA, 1801 Airport Road, Wichita, 
Kansas 67209; telephone: (316) 946-4157; facsimile: (316) 946-4107.

SUPPLEMENTARY INFORMATION: Has FAA taken any action to this point? 
Several accidents/incidents with Cessna Models 208 and 208B airplanes 
during operations in icing conditions, including six accidents in the 
2003/2004 and 2004/2005 icing seasons, and nine events in the 2004/2005 
icing season caused us to issue AD 2005-07-01, Amendment 39-14025 (70 
FR 15223, March 25, 2005). AD 2005-07-01 currently requires you to 
incorporate information into the applicable section of the Airplane 
Flight Manual (AFM) on Cessna Models 208 and 208B. This accident/
incident data and the evaluation of recent Cessna flight test data 
prompted us to issue AD 2006-01-11, Amendment 39-14450 (71 FR 1941). AD 
2006-01-11 requires the installation of a pilot assist handle, 
pneumatic deicing boots on the cargo pod and landing gear struts, and 
changes to the Limitations section of AFM if the airplane is to be 
operated in ground icing conditions and approved for flight into known 
or forecast icing conditions.
    What has happened since AD 2005-07-01 to initiate this AD action? 
So far for the icing season of 2005/2006, the FAA is aware of the 
following:
    <bullet> On October 6, 2005, a fatal accident occurred shortly 
after takeoff in which the pilot reported a failure to maintain 
altitude while in icing conditions and a subsequent loss of control.
    <bullet> On November 19, 2005, a Model C208 experienced a loss of 
controlled flight while in icing conditions during descent that 
resulted in a fatal accident.
    <bullet> On November 22, 2005, an incident occurred in which a 
Model C208 suffered a loss of control during climb with the autopilot 
engaged in icing conditions.
    <bullet> On December 5, 2005, Cessna published revisions to the AFM 
Icing Supplement. These revisions incorporated climb performance data 
in icing based on a natural icing encounter in moderate, mixed 
conditions.
    <bullet> Cessna briefed the FAA that flight testing with ice shapes 
representing intercycle ice in a moderate, clear ice encounter showed 
the actual climb performance is lower than the data published in the 
AFM Icing Supplement revision, dated December 5, 2005, and that the 
aural stall warning system will not activate prior to stall in some 
icing conditions.
    <bullet> The AFM Icing Supplement, dated December 5, 2005, 
contained incorrect maximum weight limits for the 600 HP versions of 
the Model 208.
    In summary, for the nine events that occurred during the 2004/2005 
icing season, airplane performance was degraded to a point in which 
altitude could not be maintained or the airplane could not climb to 
exit icing conditions. In one accident and one incident this 2005/2006 
icing season, inadequate situational awareness may have contributed to 
a loss of controlled flight

[[Page 13534]]

and in the one case may have resulted in an accident.
    What is the potential impact if FAA took no action? If the pilot 
does not have enough information to conduct safe flight into icing 
conditions in the AFM, then loss of control of the airplane could 
occur.
    Is there service information that applies to this subject? Cessna 
has developed revisions to the FAA-approved AFM to address this issue, 
as follows:

------------------------------------------------------------------------
             Document                              Affects
------------------------------------------------------------------------
Temporary Revision 208PHTR05,       Cessna Model 208, all models and
 dated June 27, 2005, to the FAA-    serial numbers.
 approved Airplane Flight Manual.
Revision 6 of the 208 (675 SHP)     Cessna Model 208 airplanes with a
 FAA-approved Flight Manual          Pratt & Whitney of Canada Ltd.,
 Supplement 1 ``Known Icing          PT6A-114 turboprop engine installed
 Equipment'', Cessna document        (675 SHP) or FAA-approved engine of
 D1352-S1-06, dated June 27, 2005.   equivalent horsepower installed,
                                     except airplanes modified by
                                     Supplemental Type Certificate
                                     SA00892WI.
Revision 6 of the 208 (600 SHP)     Cessna Model 208 airplanes with a
 FAA-SHP) FAA-approved Flight        Pratt & Whitney of Canada Ltd.,
 Manual Supplement S1 ``Known        PT6A-114 turboprop engine installed
 Icing Equipment'', Cessna           (600 SHP) or FAA-approved engine of
 document D1307-S1-06, dated June    equivalent horsepower installed,
 27, 2005.                           except airplanes modified by
                                     Supplemental Type Certificate
                                     SA00892WI.
 Revision 7 of the 208B (675 SHP)   Cessna Model 208B airplanes with a
 FAA-approved Flight Manual          Pratt & Whitney of Canada Ltd.,
 Supplement S1 ``Known Icing         PT6A-114A turboprop engine
 Equipment'', Cessna document        installed (675 SHP) or FAA-approved
 D1329-S1-07, dated June 27, 2005.   engine of equialent horsepower
                                     installed, except airplanes
                                     modified by Supplemental Type
                                     Certificate SA00892WI.
Revision 6 of the 208B (600 SHP)    Cessna Model 208B airplanes with a
 FAA-approved Flight Manual          Pratt & Whitney of Canda Ltd., OT6A-
 Supplement S1 ``Known Icing         114 turboprop engine installed (600
 Equipment'', Cessna document        SHP) or FAA-approved engine of
 D1309-S1-06, dated June 27, 2005.   equivalent horsepower installed,
                                     except airplanes modified by
                                     Supplemental Type Certificate
                                     SA00892WI.
------------------------------------------------------------------------

FAA's Determination and Requirements of the AD

    What has FAA decided? We have evaluated all pertinent information 
and identified an unsafe condition that is likely to exist or develop 
on other Cessna Models 208 and 208B airplanes of the same type design. 
Therefore, we are issuing this AD to assure that the pilot has enough 
information to prevent loss of control of the airplane while in-flight 
during icing conditions.
    What does this AD require? This AD supersedes AD 2005-07-01 with a 
new AD that requires the incorporation of later revisions to the FAA-
approved AFM and FAA-approved AFM Supplement S1 ``Known Icing 
Equipment'', requires the incorporation of new text in the Limitations 
Section of the AFM and AFM Supplement, requires the incorporation of 
new text in the Performance Section of the AFM Supplement, and the 
fabrication and installation of placards.
    In preparing this rule, we contacted type clubs and aircraft 
operators last winter to get technical information and information on 
operational and economic impacts. We received comments on the 
performance of the airplane in moderate icing conditions, however we 
did not receive any comments related to the low speed annunciation 
system. Although we have not previously proposed limitations on 
autopilot use in icing, the limitation on autopilot use is an interim 
action until an acceptable low speed annunciation system is developed 
and installed on the airplane. We have included a discussion of 
information that may have influenced this action in the rulemaking 
docket.
    How does the revision to 14 CFR part 39 affect this AD? On July 10, 
2002, we published a new version of 14 CFR part 39 (67 FR 47997, July 
22, 2002), which governs FAA's AD system. This regulation now includes 
material that relates to altered products, special flight permits, and 
alternative methods of compliance. This material previously was 
included in each individual AD. Since this material is included in 14 
CFR part 39, we will not include it in future AD actions.

Comments Invited

    Will I have the opportunity to comment before you issue the rule? 
This AD is a final rule that involves requirements affecting flight 
safety and was not preceded by notice and an opportunity for public 
comment; however, we invite you to submit any written relevant data, 
views, or arguments regarding this AD. Send your comments to an address 
listed under ADDRESSES. Include ``Docket No. FAA-2006-23648; 
Directorate Identifier 2006-CE-07-AD'' in the subject line of your 
comments. If you want us to acknowledge receipt of your mailed 
comments, send us a self-addressed, stamped postcard with the docket 
number written on it; we will date-stamp your postcard and mail it back 
to you. We specifically invite comments on the overall regulatory, 
economic, environmental, and energy aspects of the rule that might 
suggest a need to modify it. If a person contacts us through a 
nonwritten communication, and that contact relates to a substantive 
part of this AD, we will summarize the contact and place the summary in 
the docket. We will consider all comments received by the closing date 
and may amend the AD in light of those comments.

Authority for This Rulemaking

    What authority does FAA have for issuing this rulemaking action? 
Title 49 of the United States Code specifies the FAA's authority to 
issue rules on aviation safety. Subtitle I, section 106 describes the 
authority of the FAA Administrator. Subtitle VII, Aviation Programs, 
describes in more detail the scope of the agency's authority.
    We are issuing this rulemaking under the authority described in 
subtitle VII, part A, subpart III, section 44701, ``General 
requirements.'' Under that section, Congress charges the FAA with 
promoting safe flight of civil aircraft in air commerce by prescribing 
regulations for practices, methods, and procedures the Administrator 
finds necessary for safety in air commerce. This regulation is within 
the scope of that authority because it addresses an unsafe condition 
that is likely to exist or develop on products identified in this AD.

Regulatory Findings

    Will this AD impact various entities? We have determined that this 
AD will not have federalism implications under Executive Order 13132. 
This AD will not have a substantial direct effect on the States, on the 
relationship between the national government and the States, or on the 
distribution of power and

[[Page 13535]]

responsibilities among the various levels of government.
    Will this AD involve a significant rule or regulatory action? For 
the reasons discussed above, I certify that this AD:
    1. Is not a ``significant regulatory action'' under Executive Order 
12866;
    2. Is not a ``significant rule'' under the DOT Regulatory Policies 
and Procedures (44 FR 11034, February 26, 1979); and
    3. Will not have a significant economic impact, positive or 
negative, on a substantial number of small entities under the criteria 
of the Regulatory Flexibility Act.
    We prepared a summary of the costs to comply with this AD (and 
other information as included in the Regulatory Evaluation) and placed 
it in the AD Docket. You may get a copy of this summary by sending a 
request to us at the address listed under ADDRESSES. Include ``AD 
Docket FAA-2006-23648; Directorate Identifier 2006-CE-07-AD'' in your 
request.

List of Subjects in 14 CFR Part 39

    Air transportation, Aircraft, Aviation safety, Safety.

Adoption of the Amendment

0
Accordingly, under the authority delegated to me by the Administrator, 
the Federal Aviation Administration amends part 39 of the Federal 
Aviation Regulations (14 CFR part 39) as follows:

PART 39--AIRWORTHINESS DIRECTIVES

0
1. The authority citation for part 39 continues to read as follows:

    Authority: 49 U.S.C. 106(g), 40113, 44701.


Sec.  39.13  [Amended]

0
2. The FAA amends Sec.  39.13 by removing Airworthiness Directive (AD) 
2005-07-01, Amendment 39-14025 (70 FR 15223, March 25, 2005), and by 
adding a new AD to read as follows:

2006-06-06 The Cessna Aircraft Company: Amendment 39-14514; Docket 
No. FAA-2006-23648; Directorate Identifier 2006-CE-07-AD.

When Does This AD Become Effective?

    (a) This AD becomes effective on March 24, 2006.

Are Any Other ADs Affected By This Action?

    (b) Yes. This AD supersedes AD 2005-07-01; Amendment 39-14025.

What Airplanes Are Affected by This AD?

    (c) This AD affects Models 208 and 208B, all serial numbers, 
that are certificated in any category.

What is the Unsafe Condition Presented in This AD?

    (d) This AD is the result of several accidents/incidents with 
the affected airplanes during operations in icing conditions, FAA 
evaluation of Cessna flight test data, Cessna issuing service 
information, and FAA evaluating the service information. We are 
issuing this AD to assure that the pilot has enough information to 
prevent loss of control of the airplane while in-flight during icing 
conditions.

What Must I Do To Address This Problem?

    (e) No later than March 27, 2006 (3 days after the effective 
date of this AD of March 24, 2006), incorporate the following 
revisions into the Airplane Flight Manual (AFM):

------------------------------------------------------------------------
                                          Incorporate the following AFM
           Affected airplanes                   revision document
------------------------------------------------------------------------
(1) Cessna Model 208 airplanes and       Section 2: Limitations and
 Model 208B airplanes, all serial         Section 4: Normal Procedures:
 numbers.                                 Temporary Revision 208PHTR05,
                                          dated June 27, 2005, to the
                                          Pilots Operating Handbook
                                          (POH) and FAA-approved
                                          Airplane Flight Manual (AFM).
(2) Cessna Model 208 airplanes with a    Section 9: Optional Systems
 Pratt & Whitney of Canada Ltd., PT6A-    Description and Operating
 114A turboprop engine installed (675     Procedures: Revision 6 of the
 SHP) or FAA-approved engine of           208 (675 SHP) POH/FAA-approved
 equivalent horsepower installed,         AFM Supplement S1 ``Known
 equipped with airframe deicing           Icing Equipment'', Cessna
 pneumatic boots, that are not            document D1352-S1-06, dated
 currently prohibited from flight in      June 27, 2005.
 known or forecast icing.
(3) Cessna Model 208 airplanes with a    Section 9: Optional Systems
 Pratt & Whitney of Canada Ltd., PT6A-    Description and Operating
 114 turboprop engine installed (600      Procedures: Revision 6 of the
 SHP) or FAA-approved engine of           Cessna Model 208 (600 SHP) POH/
 equivalent horsepower installed,         FAA-approved AFM Supplement S1
 equipped with airframe deicing           ``Known Icing Equipment'',
 pneumatic boots, that are not            Cessna document D1307-S1-06,
 currently prohibited from flight in      dated June 27, 2005.
 known or forecast icing.
(4) Cessna Model 208B airplanes with a   Section 9: Optional Systems
 Pratt & Whitney of Canada Ltd., PT6A-    Description and Operating
 114A turboprop engine installed (675     Procedures: Revision 7 of the
 SHP) or FAA-approved engine of           208B (675 SHP) POH/FAA-
 equivalent horsepower installed,         approved AFM Supplement S1
 equipped with airframe deicing           ``Known Icing Equipment'',
 pneumatic boots, that are not            Cessna document D1329-0S1-007,
 currently prohibited from flight in      dated June 27, 2005.
 known or forecast icing.
(5) Cessna Model 208B airplanes with a   Section 9: Optional Systems
 Pratt & Whitney of Canada Ltd., PT6A-    Description and Operating
 114 turboprop engine installed (600      Procedures: Revision 6 208B
 SHP) or FAA-approved engine of           (600 SHP) POH/FAA-approved AFM
 equivalent horsepower installed,         Supplement S1 ``Known Icing
 equipped with airframe deicing           Equipment'', Cessna document
 pneumatic boots, that are not of the     D1309-0S1-006, dated June 27,
 currently prohibited from flight in      2005.
 known or forecast icing.
------------------------------------------------------------------------

    (f) You must do the following, unless already done. These 
changes are to the Pilots Operating Handbook (POH) and FAA-approved 
AFM and to the POH/FAA-approved AFM Supplement S1 ``Known Icing 
Equipment'' mandated in paragraph (e) of this AD:

------------------------------------------------------------------------
           Actions                 Compliance            Procedures
------------------------------------------------------------------------
(1) For Cessna Model 208      No later than March   Not Applicable.
 airplanes and Model 208B      27, 2006 (3 days
 airplanes, all serial         after the effective
 numbers, equipped with        date of this AD of
 airframe deicing pneumatic    March 24, 2006).
 boots, that are not
 currently prohibited from
 flight in known or forecast
 icing: You are prohibited
 from continued flight after
 encountering moderate or
 greater icing conditions.
 The airplane can dispatch
 into forecast areas of
 icing but must exit
 moderate or greater icing
 conditions if encountered.

[[Page 13536]]

 
(2) For Cessna Model 208      No later than March   The owner/operator
 airplanes and Model 208B      27, 2006 (3 days      holding at least a
 airplanes, all serial         after the effective   private pilot
 numbers, equipped with        date of this AD of    certificate as
 airframe deicing pneumatic    March 24, 2006).      authorized by
 boots, that are not                                 section 43.7 of the
 currently prohibited from                           Federal Aviation
 flight in known or forecast                         Regulations (14 CFR
 icing:                                              43.7) may insert
(i) Insert the text in                               the information
 Appendix 1 of this AD                               into the POH as
 preceding the KINDS OF                              specified in
 OPERATION LIMITS paragraph                          paragraph (f)(2) of
 in the LIMITATIONS section                          this AD. You may
 of the Cessna Models 208 or                         insert a copy of
 208B Pilot's Operating                              this AD into the
 Handbook (POH) and FAA-                             appropriate
 approved Airplane Flight                            sections of the POH
 Manual (AFM).                                       to comply with this
(ii) Insert the text in                              action. Make an
 Appendix 2 of this AD in                            entry into the
 the LIMITATIONS section of                          aircraft records
 the Cessna Models 208 or                            showing compliance
 208B POH and FAA-approved                           with portion of the
 AFM KNOWN ICING EQUIPMENT                           AD in accordance
 SUPPLEMENT S1 at the                                with section 43.9
 beginning of the paragraph                          of the Federal
 ``REQUIRED EQUIPMENT''.                             Aviation
                                                     Regulations (14 CFR
                                                     43.9).
(3) For Cessna Model 208      No later than March   The owner/operator
 airplanes and Model 208B      27, 2006 (3 days      holding at least a
 airplanes, all serial         after the effective   private pilot
 numbers, equipped with        date of this AD of    certificate as
 airframe deicing pneumatic    March 24, 2006).      authorized by
 boots, that are not                                 section 43.7 of the
 currently prohibited from                           Federal Aviation
 flight in known or forecast                         Regulations (14 CFR
 icing: Install 3 placards                           43.7) may install
 with black letters on a                             the placards as
 white background. The                               specified in
 placards shall be located                           paragraph (f)(3) of
 on the instrument panel in                          this AD. You may
 one of the following areas:                         insert a copy of
 under the radio stack,                              this AD into the
 immediately above the                               appropriate
 pilot's flight instruments,                         sections of the POH
 or below the pilot's                                to comply with this
 vertical speed indicator.                           action. Make an
 Lettering on the placard                            entry into the
 shall be a minimum height                           aircraft records
 of \1/8\-inch.                                      showing compliance
(i) Placard 1 shall include                          with portion of the
 the text of Appendix 3 of                           AD in accordance
 this AD.                                            with section 43.9
(ii) Placard 2 shall include                         of the Federal
 the following text: ``120                           Aviation
 KIAS Minimum in Icing Flaps                         Regulations (14 CFR
 UP except 110 KIAS if                               43.9).
 Climbing to Exit Icing''.
(iii) Placard 3 shall
 include the following text:
 ``Disconnect autopilot at
 first indication of ice
 accretion''.
(4) For Cessna Model 208      No later than March   The owner/operator
 airplanes and Model 208B      27, 2006 (3 days      holding at least a
 airplanes, all serial         after the effective   private pilot
 numbers, equipped with        date of this AD of    certificate as
 airframe deicing pneumatic    March 24, 2006).      authorized by
 boots, that are not                                 section 43.7 of the
 currently prohibited from                           Federal Aviation
 flight in known or forecast                         Regulations (14 CFR
 icing:                                              43.7) may insert
(i) Insert the text in                               the information
 Appendix 4 of this AD under                         into the POH as
 the ``AIRSPEED                                      specified in
 LIMITATIONS'' paragraph in                          paragraph (f)(4) of
 the LIMITATIONS section of                          this AD. You may
 the Cessna Models 208 or                            insert a copy of
 208B POH and FAA-approved                           this AD into the
 AFM.                                                appropriate
(ii) Replace the text in the                         sections of the POH
 KNOWN ICING EQUIPMENT                               to comply with this
 SUPPLEMENT S1 UNDER THE                             action. Make an
 ``MINIMUM SPEED IN ICING                            entry into the
 CONDITIONS'' paragraph with                         aircraft records
 the text in Appendix 4.                             showing compliance
(iii) Insert the following                           with portion of the
 text in the LIMITATIONS                             AD in accordance
 section of the POH/AFM                              with section 43.9
 under the ``OTHER                                   of the Federal
 LIMITATIONS'' paragraph and                         Aviation
 in the LIMITATIONS section                          Regulations (14 CFR
 of the KNOWN ICING                                  43.9).
 EQUIPMENT SUPPLEMENT S1
 under the ``AUTOPILOT
 OPERATIONS IN ICING
 CONDITIONS'' paragraph:
 ``Disconnect autopilot at
 first indication of ice
 accretion''.

[[Page 13537]]

 
(5) For Cessna Model 208      No later than March   The owner/operator
 airplanes and Model 208B      27, 2006 (3 days      holding at least a
 airplanes, all serial         after the effective   private pilot
 numbers, equipped with        date of this AD of    certificate as
 airframe deicing pneumatic    March 24, 2006).      authorized by
 boots, that are not                                 section 43.7 of the
 currently prohibited from                           Federal Aviation
 flight in known or forecast                         Regulations (14 CFR
 icing:.                                             43.7) may insert
(i) Replace the text in the                          the information
 PERFORMANCE section of the                          into the POH as
 Cessna Models 208 or 208B                           specified in
 POH and FAA-approved AFM                            paragraph (f)(5) of
 KNOWN ICING EQUIPMENT                               this AD. You may
 SUPPLEMENT S1 UNDER THE                             insert a copy of
 ``STALL SPEEDS'' paragraph                          this AD into the
 with the text in Appendix 5.                        appropriate
(ii) Replace the ``WARNING''                         sections of the POH
 text in the LIMITATIONS                             to comply with this
 section of the Cessna                               action. Make an
 Models 208 or 208B POH and                          entry into the
 FAA-approved AFM KNOWN                              aircraft records
 ICING EQUIPMENT SUPPLEMENT                          showing compliance
 S1 under ``ENVIRONMENTAL                            with portion of the
 CONDITIONS'' with: ``FLIGHT                         AD in accordance
 IN THESE CONDITIONS ARE                             with section 43.9
 PROHIBITED''.                                       of the Federal
(iii) Replace the last two                           Aviation
 sentences in the                                    Regulations (14 CFR
 LIMITATIONS section of the                          43.9).
 Cessna Models 208 or 208B
 POH and FAA-approved AFM
 KNOWN ICING EQUIPMENT
 SUPPLEMENT S1 under
 ``ENVIRONMENTAL
 CONDITIONS'' with the
 following text: ``Exit
 strategies should be
 determined during preflight
 planning''.
------------------------------------------------------------------------

How Do I Remove the Icing Prohibition of Paragraph (f)(1) of This AD?

    (g) The prohibition from continued flight after encountering 
moderate or greater icing conditions (the prohibition of paragraph 
(f)(1) of this AD) may be removed when all of the following occurs:
    (1) The FAA, with Cessna's assistance, determines that the 
aircraft models can operate safely in icing conditions, and any 
required information from this activity is made available to 
operators;
    (2) The FAA approves a Low Speed Awareness System, that as a 
minimum incorporates an aural warning and activates at a minimum of 
110 KIAS, and it is scheduled for installation on your aircraft 
within an acceptable amount of time;
    (3) You comply with AD 2006-01-11, Amendment 39-14450 (71 FR 
1941) (or later revised AD), as required for your aircraft, and
    (4) The FAA will notify operators about paragraphs (g)(1) and 
(g)(2) of this AD by either distribution of a special airworthiness 
information bulletin (SAIB) such that operators can apply for an 
alternative method of compliance and/or through a revision of this 
AD.

May I Request an Alternative Method of Compliance?

    (h) You may request a different method of compliance or a 
different compliance time for this AD by following the procedures in 
14 CFR 39.19. Unless FAA authorizes otherwise, send your request to 
your principal inspector. The principal inspector may add comments 
and will send your request to the Manager, Wichita Aircraft 
Certification Office (ACO), FAA. The alternative method of 
compliance to AD 2005-07-01, dated June 22, 2005 has now been 
incorporated into the rule. For information on any already approved 
alternative methods of compliance, contact Robert P. Busto, 
Aerospace Engineer, Wichita ACO, FAA, 1801 Airport Road, Wichita, 
Kansas 67209; telephone: (316) 946-4157; facsimile: (316) 946-4107.

May I Get Copies of the Document Referenced in This AD?

    (i) You may obtain the service information referenced in this AD 
from The Cessna Aircraft Company, Product Support, P.O. Box 7706, 
Wichita, Kansas 67277-7706; telephone: (316) 517-5800; facsimile: 
(316) 942-9006. To view the AD docket, go to the Docket Management 
Facility; U.S. Department of Transportation, 400 Seventh Street, 
SW., Nassif Building, Room PL-401, Washington, DC, or on the 
Internet at http://dms.dot.gov. The docket number is FAA-2006-23648; 
Directorate Identifier 2006-CE-07-AD.

Appendix 1 to AD 2006-06-06--Changes to the Cessna Models 208 or 208B 
Pilot's Operating Handbook (POH) and FAA-Approved Airplane Flight 
Manual

Affected Cessna Models 208 or 208B Pilot's Operating Handbook (POH) and 
FAA-Approved Airplane Flight Manual (AFM)

    Insert the following text at the beginning of the KINDS OF 
OPERATION LIMITS paragraph in the LIMITATIONS section of the Cessna 
Models 208 or 208B Pilot's Operating Handbook (POH) and FAA-Approved 
Airplane Flight Manual (AFM). This may be done by inserting a copy 
of this AD into the POH/AFM:
    ``Continued flight after encountering moderate or greater icing 
conditions is prohibited. One or more of the following defines 
moderate icing conditions for this airplane:

Indicated airspeed in level cruise flight at constant power 
decreases by 20 knots.
Engine torque required to maintain airspeed increases by 400 ft. 
lbs.
Airspeed of 120 KIAS cannot be maintained in level flight.
An accretion of \1/4\-inch of ice is observed on the wing strut.

    Disregard any mention of approval for flight in icing conditions 
within the POH/AFM.''

Appendix 2 to AD 2006-06-06--Changes to the Cessna Models 208 or 208B 
Pilot's Operating Handbook (POH) and FAA-Approved Airplane Flight 
Manual

Affected Cessna Models 208 or 208B Pilot's Operating Handbook (POH) and 
FAA-Approved Airplane Flight Manual (AFM)

    Insert the following text in the LIMITATIONS section of the POH 
and FAA-approved AFM KNOWN ICING EQUIPMENT SUPPLEMENT S1, at the 
beginning of the paragraph ``REQUIRED EQUIPMENT''. This may be done 
by inserting a copy of this AD into the POH/AFM:
    ``Continued flight after encountering moderate or greater icing 
conditions is prohibited. One or more of the following defines 
moderate icing conditions for this airplane:

Indicated airspeed in level flight at constant power decreases by 20 
knots.
Engine torque required to maintain airspeed increases by 400 ft. 
lbs.
Airspeed of 120 KIAS cannot be maintained in level flight.
An accretion of \1/4\-inch of ice is observed on the wing strut.


[[Page 13538]]


    Disregard any mention of approval for flight in icing conditions 
within the POH/AFM.''

Appendix 3 to AD 2006-06-06--Cessna Model 208 Airplanes and Model 208B 
Airplanes, Equipped With Airframe Deicing Pneumatic Boots, That Are Not 
Currently Prohibited From Flight in Known or Forecast Icing

    Install a placard with black letters on a white background. The 
placard shall be located on the instrument panel in one of the 
following areas: Under the radio stack, immediately above the 
pilot's flight instruments, or below the pilot's vertical speed 
indicator. Lettering on the placard shall be a minimum \1/8\-inch 
tall and state the following:
    ``Continued flight after encountering moderate or greater icing 
conditions is prohibited. One or more of the following defines 
moderate icing conditions for this airplane:

Airspeed in level flight at constant power decreases by 20 KIAS.
Engine torque required to maintain airspeed increases by 400 ft. 
lbs.
120 KIAS cannot be maintained in level flight.
Ice accretion of \1/4\ inch observed on the wing strut.''

Appendix 4 to AD 2006-06-06--Changes to the Cessna Models 208 or 208B 
Pilot's Operating Handbook (POH) and FAA-Approved Airplane Flight 
Manual Supplement S1

Affected Cessna Models 208 or 208B Pilot's Operating Handbook (POH) and 
FAA-Approved Airplane Flight Manual (AFM) and FAA-Approved Supplement 
S1

    Insert the following text into the LIMITATIONS section under the 
``AIRSPEED LIMITATIONS'' paragraph of the Cessna Models 208 or 208B 
Pilot's Operating Handbook (POH) and FAA-Approved Airplane Flight 
Manual (AFM), and Replace the text in the KNOWN ICING EQUIPMENT 
SUPPLEMENT S1 under the ``MINIMUM SPEED IN ICING CONDITIONS'' 
paragraph with the following text. This may be done by inserting a 
copy of this AD into the POH/AFM:
    Minimum airspeed in icing conditions, for all flight phases 
including approach, except takeoff and landing:

Flaps up: 120 KIAS
Flaps 10[deg]: 105 KIAS
Flaps 20[deg]: 95 KIAS

    Exception for flaps up: when climbing to exit icing conditions 
airspeed can be reduced to 110 KIAS minimum.
    Flaps must be extended during all phases (takeoff and landing 
included) at airspeeds below 110 KIAS, except adhere to published 
AFM procedures when operating with ground deicing/anti-icing fluid 
applied.

WARNING

    The aural stall warning system does not function properly in all 
icing conditions and should not be relied upon to provide adequate 
stall warning when in icing conditions.''


    Note: These are minimum speeds for operations in icing 
conditions. Disregard any reference to the original speeds within 
the POH/AFM.

Appendix 5 to AD 2006-06-06--Changes to the Cessna Models 208 or 208B 
Pilot's Operating Handbook (POH) and FAA-Approved Airplane Flight 
Manual Supplement S1

    Replace the text in the PERFORMANCE section of the POH/AFM KNOWN 
ICING EQUIPMENT SUPPLEMENT S1 under the ``STALL SPEEDS'' paragraph 
with the following text:
    ``Ice accumulation on the airframe may result in a 20 KIAS 
increase in stall speed. Either buffet or aural stall warning should 
be treated as an imminent stall.''
    ``WARNING--The aural stall warning system does not function 
properly in all icing conditions and should not be relied upon to 
provide adequate stall warning when in icing conditions.''

    Issued in Kansas City, Missouri, on March 10, 2006.
Kim Smith,
Manager, Small Airplane Directorate, Aircraft Certification Service.
[FR Doc. 06-2544 Filed 3-15-06; 8:45 am]
BILLING CODE 4910-13-P

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