Airworthiness Directives; Raytheon Aircraft Company Model B100 Airplanes

[Federal Register Volume 69, Number 216 (Tuesday, November 9, 2004)]
[Rules and Regulations]
[Pages 64858-64860]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 04-24630]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. 2004-CE-11-AD; Amendment 39-13856; AD 2004-22-28]
RIN 2120-AA64


Airworthiness Directives; Raytheon Aircraft Company Model B100 
Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule.

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SUMMARY: The FAA adopts a new airworthiness directive (AD) for certain 
Raytheon Aircraft Company (Raytheon) Model B100 airplanes. This AD 
requires you to drill holes in the hot lip tube ``B'' nuts, tighten the 
``B'' nuts to specified torque ranges, and secure the ``B'' nuts with 
safety wire. This AD is the result of reports of loose ``B'' nuts on 
the engine inlet that may loosen and permit a leak in the engine inlet 
anti-ice system. We are issuing this AD to detect and correct loose 
``B'' nuts on the engine inlet, which could result in failure of the 
engine inlet anti-ice system and consequent ice buildup. This failure 
and ice buildup could lead to an engine's ingestion of ice with loss of 
engine power or loss of engine.

DATES: This AD becomes effective on December 27, 2004.
    As of December 27, 2004, the Director of the Federal Register 
approved the incorporation by reference of certain publications listed 
in the regulation.

ADDRESSES: You may get the service information identified in this AD 
from Raytheon Aircraft Company, 9709 E. Central, Wichita, Kansas 67201-
0085; telephone: (800) 429-5372 or (316) 676-3140.
    You may view the AD docket at FAA, Central Region, Office of the 
Regional Counsel, Attention: Rules Docket No. 2004-CE-11-AD, 901 
Locust, Room 506, Kansas City, Missouri 64106. Office hours are 8 a.m. 
to 4 p.m., Monday through Friday, except Federal holidays.

FOR FURTHER INFORMATION CONTACT: Jeff Pretz, Aerospace Engineer, 
Wichita Aircraft Certification Office, FAA, 1801 Airport Road, Wichita, 
Kansas 67209; telephone: (316) 946-4153; facsimile: (316) 946-4407.

SUPPLEMENTARY INFORMATION: 

Discussion

    What events have caused this AD? The FAA has received six reports 
of loose ``B'' nuts on the Raytheon Model B100 engine inlet anti-ice 
system found during routine maintenance. These loose ``B'' nuts may 
permit a leak in the engine inlet anti-ice system that would result in 
failure of the system with consequent ice buildup on the engine inlet.
    What is the potential impact if FAA took no action? Failure of the 
engine inlet anti-ice system and consequent ice buildup could lead to 
an engine's ingestion of ice with loss of engine power or loss of 
engine.
    Has FAA taken any action to this point? We issued a proposal to 
amend part 39 of the Federal Aviation Regulations (14 CFR part 39) to 
include an AD that would apply to certain Raytheon Model B100 
airplanes. This proposal was published in the Federal Register as a 
notice of proposed rulemaking (NPRM) on May 26, 2004 (69 FR 29910). The 
NPRM proposed to require you to drill holes in the hot lip tube ``B'' 
nuts, tighten the ``B'' nuts to specified torque ranges, and secure the 
``B'' nuts with safety wire.

Comments

    Was the public invited to comment? We provided the public the 
opportunity to participate in developing this AD. We received no 
comments on the proposal or on the determination of the cost to the 
public.

Conclusion

    What is FAA's final determination on this issue? We have carefully 
reviewed the available data and determined that air safety and the 
public interest require adopting the AD as proposed except for minor 
editorial corrections. We have determined that these minor corrections:
--Are consistent with the intent that was proposed in the NPRM for 
correcting the unsafe condition; and
--Do not add any additional burden upon the public than was already 
proposed in the NPRM.

Changes to 14 CFR Part 39--Effect on the AD

    How does the revision to 14 CFR part 39 affect this AD? On July 10, 
2002, the FAA published a new version of 14 CFR part 39 (67 FR 47997, 
July 22, 2002), which governs the FAA's AD system. This regulation now 
includes material that relates to altered products, special

[[Page 64859]]

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.

Costs of Compliance

    How many airplanes does this AD impact? We estimate that this AD 
affects 96 airplanes in the U.S. registry.
    What is the cost impact of this AD on owners/operators of the 
affected airplanes? We estimate the following costs to do the 
inspection and modification:

----------------------------------------------------------------------------------------------------------------
                                                                                 Total cost per   Total cost on
                  Labor cost                              Parts cost                airplane      U.S. operators
----------------------------------------------------------------------------------------------------------------
4 workhours x $65 per hour = $260............  Not Applicable.................            $260          $24,960
----------------------------------------------------------------------------------------------------------------

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 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 
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 No. 2004-CE-11-AD'' in your request.

List of Subjects in 14 CFR Part 39

    Air transportation, Aircraft, Aviation safety, Incorporation by 
reference, 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. FAA amends Sec.  39.13 by adding a new AD to read as follows:

2004-22-28 Raytheon Aircraft Company: Amendment 39-13856; Docket No. 
2004-CE-11-AD.

When Does This AD Become Effective?

    (a) This AD becomes effective on December 27, 2004.

What Other ADs Are Affected by This Action?

    (b) None.

What Airplanes Are Affected by This AD?

    (c) This AD affects Model B100 airplanes, serial numbers BE-1 
through BE-136, that are certificated in any category.

What Is the Unsafe Condition Presented in This AD?

    (d) This AD is the result of reports of loose ``B'' nuts on the 
engine inlet that may loosen and permit a leak in the engine inlet 
anti-ice system. The actions specified in this AD are intended to 
detect and correct loose ``B'' nuts on the engine inlet, which could 
result in failure of the engine inlet anti-ice system and consequent 
ice buildup. This failure and ice buildup could lead to an engine's 
ingestion of ice with loss of engine power or loss of engine.

What Must I Do To Address This Problem?

    (e) To address this problem, you must do the following:

----------------------------------------------------------------------------------------------------------------
                 Actions                                  Compliance                          Procedures
----------------------------------------------------------------------------------------------------------------
(1) Drill a 0.035-inch hole in each of     Within the next 150 hours time-in-        Follow Raytheon Aircraft
 the hot tube ``B'' nuts (part number (P/   service (TIS) or 6 calendar months        Mandatory Service Bulletin
 N) AN818-6D and AN818-8D).                 after December 27, 2004 (the effective    No. SB 30-3143, dated
                                            date of this AD), whichever occurs        September 2001. The
                                            first.                                    applicable airplane
                                                                                      maintenance manual also
                                                                                      addresses this issue.
------------------------------------------
(2) Tighten the hot lip tube ``B'' nuts    Before further flight after the actions   Follow Raytheon Aircraft
 to a specified torque range:               required by paragraph (e)(1) of the AD.   Mandatory Service Bulletin
(i) Tighten hot lip tube ``B'' nuts P/N                                               No. SB 30-3143, dated
 AN818-6D to a torque range of 75 to 125                                              September 2001. The
 inch-pounds.                                                                         applicable airplane
(ii) Tighten hot lip tube ``B'' nuts P/N                                              maintenance manual also
 AN818-8D to a torque range of 150 to 250                                             addresses this issue.
 inch-pounds.
------------------------------------------
(3) Secure the hot lip tube ``B'' nuts (P/ Before further flight after the actions   Follow Raytheon Aircraft
 N AN818-6D and AN818-8D) with safety       required by paragraph (e)(2) of this      Mandatory Service Bulletin
 wire.                                      AD.                                       No. SB 30-3143, dated
                                                                                      September 2001. The
                                                                                      applicable airplane
                                                                                      maintenance manual also
                                                                                      addresses this issue.
----------------------------------------------------------------------------------------------------------------

May I Request an Alternative Method of Compliance?

    (f) 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. For information on any already 
approved alternative methods of compliance, contact Jeff Pretz, 
Aerospace Engineer, Wichita ACO, FAA, 1801 Airport Road, Wichita, 
Kansas 67209; telephone: (316) 946-4153; facsimile: (316) 946-4407.

Does This AD Incorporate Any Material by Reference?

    (g) You must do the actions required by this AD following the 
instructions in Raytheon Aircraft Mandatory Service Bulletin No. SB 
30-3143, dated September 2001. The Director of the Federal Register 
approved the incorporation by reference of

[[Page 64860]]

this service bulletin in accordance with 5 U.S.C. 552(a) and 1 CFR 
part 51. You may get a copy from Raytheon Aircraft Company, 9709 E. 
Central, Wichita, Kansas 67201-0085; telephone: (800) 429-5372 or 
(316) 676-3140. You may review copies at FAA, Central Region, Office 
of the Regional Counsel, 901 Locust, Room 506, Kansas City, Missouri 
64106; or at the National Archives and Records Administration 
(NARA). For information on the availability of this material at 
NARA, call (202) 741-6030, or go to: http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html.

    Issued in Kansas City, Missouri, on October 27, 2004.
David R. Showers,
Acting Manager, Small Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 04-24630 Filed 11-8-04; 8:45 am]
BILLING CODE 4910-13-P

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