Airworthiness Directives; British Aerospace Model H.P. 137 Jetstream Mk. 1, Jetstream Model 3101, Jetstream Model 3201, and Jetstream 200 Series Airplanes

[Federal Register Volume 63, Number 113 (Friday, June 12, 1998)]
[Rules and Regulations]
[Pages 32119-32121]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 98-15360]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. 97-CE-110-AD; Amendment 39-10577; AD 98-12-23]
RIN 2120-AA64


Airworthiness Directives; British Aerospace Model H.P. 137 
Jetstream Mk. 1, Jetstream Model 3101, Jetstream Model 3201, and 
Jetstream 200 Series Airplanes

AGENCY: Federal Aviation Administration, DOT.

ACTION: Final rule.

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SUMMARY: This amendment adopts a new airworthiness directive (AD) that 
applies to certain British Aerospace (BAe) Model H.P. 137 Jetstream Mk. 
1, Jetstream Model 3101, Jetstream Model 3201, and Jetstream 200 series 
airplanes. This AD requires replacing the windshield wiper arm 
attachment bolts and windshield wiper arm on all of the affected 
airplanes; and measuring the material thickness of the upper and lower 
toggle attachment brackets on the nose landing gear of the affected 
airplanes, and replacing the toggle attachment bracket lugs. This AD is 
the result of mandatory continuing airworthiness information (MCAI) 
issued by the airworthiness authority for the United Kingdom. The 
actions specified by this AD are intended to prevent the windshield 
wiper arm from corroding, detaching from the airplane during flight, 
and penetrating the fuselage, which could result in possible injury to 
the pilot and passengers; and to prevent collapse of the nose landing 
gear caused by design deficiency, which could result in loss of control 
of the airplane during landing operations.

DATES: Effective July 28, 1998.

    The incorporation by reference of certain publications listed in 
the regulations is approved by the Director of the Federal Register as 
of July 28, 1998.

ADDRESSES: Service information that applies to this AD may be obtained 
from British Aerospace Regional Aircraft., Prestwick International 
Airport, Ayrshire, KA9 2RW, Scotland;

[[Page 32120]]

telephone: (01292) 479888; facsimile: (01292) 479703. This information 
may also be examined at the Federal Aviation Administration (FAA), 
Central Region, Office of the Regional Counsel, Attention: Rules Docket 
No. 97-CE-110-AD, Room 1558, 601 E. 12th Street, Kansas City, Missouri 
64106; or at the Office of the Federal Register, 800 North Capitol 
Street, NW, suite 700, Washington, DC.

FOR FURTHER INFORMATION CONTACT: Mr. S. M. Nagarajan, Aerospace 
Engineer, Small Airplane Directorate, Aircraft Certification Service, 
FAA, 1201 Walnut, suite 900, Kansas City, Missouri 64106; telephone: 
(816) 426-6934; facsimile: (816) 426-2169.

SUPPLEMENTARY INFORMATION:

Events Leading to the Issuance of This AD

    A proposal to amend part 39 of the Federal Aviation Regulations (14 
CFR part 39) to include an AD that would apply to certain BAe Model 
H.P. 137 Jetstream Mk. 1, Jetstream Model 3101, Jetstream Model 3201, 
and Jetstream 200 series airplanes was published in the Federal 
Register as a notice of proposed rulemaking (NPRM) on March 26, 1998 
(63 FR 14656). The NPRM proposed to require replacing the windshield 
wiper arm and windshield wiper arm attachment bolt; and measuring the 
outer wall thickness of the nose landing gear (NLG) toggle bracket lugs 
and axle bracket lugs. The AD also proposed replacing the toggle 
bracket lugs and axle bracket lugs prior to further flight or at the 
end of their fatigue life limit, depending on the condition of the 
parts. Accomplishment of the proposed actions as specified in the NPRM 
would be in accordance with the following:
--Jetstream Series 3100/3200 Service Bulletin (SB) 30-JA 950641, which 
incorporates the following pages:

------------------------------------------------------------------------
              Pages                 Revision level           Date       
------------------------------------------------------------------------
1...............................  Revision 1........  March 18, 1997.   
2 through 8.....................  Revision 2........  March 18, 1997.   
------------------------------------------------------------------------

    This service bulletin specifies following the procedures provided 
in Rosemount Aerospace Inc. Service Bulletin No. 2314M-30-16, dated 
December, 1996;

--APPH Precision Hydraulics SB No. 32-66, which incorporates the 
following pages:

------------------------------------------------------------------------
              Pages                 Revision level           Date       
------------------------------------------------------------------------
1, 3, 4, and 5..................  Revision 1........  October 1996.     
2 and 6.........................  Revision 2........  March 1997.       
------------------------------------------------------------------------

    This service bulletin is referenced in Accomplishment Instructions 
section of Jetstream Series 3100/3200 Alert Service Bulletin No. 32-JA 
960601, Original Issue: October 25, 1996, Revision No. 1: dated April 
11, 1997.
    The NPRM was the result of mandatory continuing airworthiness 
information (MCAI) issued by the airworthiness authority for the United 
Kingdom.
    Interested persons have been afforded an opportunity to participate 
in the making of this amendment. No comments were received on the 
proposed rule or the FAA's determination of the cost to the public.

The FAA's Determination

    After careful review of all available information related to the 
subject presented above, the FAA has determined that air safety and the 
public interest require the adoption of the rule as proposed except for 
minor editorial corrections. The FAA has determined that these minor 
corrections will not change the meaning of the AD and will not add any 
additional burden upon the public than was already proposed.

Cost Impact

    The FAA estimates that 314 airplanes in the U.S. registry will be 
affected by the windshield wiper portion of this AD, that it will take 
approximately 2 workhours per airplane to accomplish the replacement 
required by this AD, and that the average labor rate is approximately 
$60 an hour. Parts will be provided at no cost. Based on these figures, 
the total cost impact for the windshield wiper portion of this AD on 
U.S. operators is estimated to be $37,680, or $120 per airplane.
    The FAA estimates that 284 airplanes in the U.S. registry will be 
affected by the nose landing gear portion of this AD, that it will take 
approximately 2 workhours per airplane to accomplish the measurement 
required by this AD, and that the average labor rate is approximately 
$60 an hour. The cost impact only takes into account the cost of the 
initial inspection. The FAA has no way to determine the number of parts 
that may be found damaged or in need of replacement as a result of the 
initial inspection. Therefore, the FAA is not approximating the cost of 
parts or the workhours to accomplish a part replacement for this AD. 
Based on these figures, the total cost impact for the inspection of the 
nose landing gear portion of this AD on U.S. operators is estimated to 
be $34,080, or $120 per airplane.

Regulatory Impact

    The regulations adopted herein will not have substantial direct 
effects 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. Therefore, in 
accordance with Executive Order 12612, it is determined that this final 
rule does not have sufficient federalism implications to warrant the 
preparation of a Federalism Assessment.
    For the reasons discussed above, I certify that this action (1) is 
not a ``significant regulatory action'' under Executive Order 12866; 
(2) is not a ``significant rule'' under 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. A copy of the final evaluation prepared for this 
action is contained in the Rules Docket. A copy of it may be obtained 
by contacting the Rules Docket at the location provided under the 
caption ADDRESSES.

List of Subjects in 14 CFR Part 39

    Air transportation, Aircraft, Aviation safety, Incorporation by 
reference, Safety.

Adoption of the Amendment

    Accordingly, pursuant to 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

    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]

    2. Section 39.13 is amended by adding a new airworthiness directive 
(AD) to read as follows:

98-12-23  British Aerospace: Amendment 39-10577; Docket No. 97-CE-
110-AD.

    Applicability: Model H.P. 137 Jetstream Mk. 1, Jetstream Model 
3101, Jetstream Model 3201, and Jetstream 200 series airplanes, all 
serial numbers, certificated in any category.

    Note 1: This AD applies to each airplane identified in the 
preceding applicability provision, regardless of whether it has been 
modified, altered, or repaired in the area

[[Page 32121]]

subject to the requirements of this AD. For airplanes that have been 
modified, altered, or repaired so that the performance of the 
requirements of this AD is affected, the owner/operator must request 
approval for an alternative method of compliance in accordance with 
paragraph (d) of this AD. The request should include an assessment 
of the effect of the modification, alteration, or repair on the 
unsafe condition addressed by this AD; and, if the unsafe condition 
has not been eliminated, the request should include specific 
proposed actions to address it.

    Compliance: Required as indicated in the body of this AD, unless 
already accomplished.
    To prevent the windshield wiper arm from corroding, detaching 
from the airplane during flight, and penetrating the fuselage, 
which, if not corrected, could result in possible injury to pilot 
and passengers; and to prevent collapse of the nose landing gear 
caused by design deficiency, which could result in loss of control 
of the airplane during landing operations, accomplish the following:
    (a) Within the next 90 days after the effective date of this AD, 
replace the windshield wiper arm and windshield wiper attachment 
bolt in accordance with the Accomplishment Instructions section in 
Jetstream Series 3100/3200 Service Bulletin (SB) 30-JA 950641, which 
incorporates the following pages:

------------------------------------------------------------------------
              Pages                 Revision level           Date       
------------------------------------------------------------------------
1...............................  Revision 1........  March 18, 1997.   
2 through 8.....................  Revision 2........  March 18, 1997.   
------------------------------------------------------------------------

    This service bulletin specifies following the procedures 
provided in the Accomplishment Instructions section of Rosemount 
Aerospace Inc. Service Bulletin No. 2314M-30-16, dated December 
1996.
    (b) Within the next 90 days after the effective date of this AD, 
measure the outer wall thickness of the nose landing gear (NLG) 
toggle bracket lugs and the axle bracket lugs in accordance with the 
Accomplishment Instructions in APPH Precision Hydraulics SB No. 32-
66, which incorporates the following pages:

------------------------------------------------------------------------
              Pages                 Revision level           Date       
------------------------------------------------------------------------
1, 3, 4, and 5..................  Revision 1........  October 1996.     
2 and 6.........................  Revision 2........  March 1997.       
------------------------------------------------------------------------

    Note 2: The APPH SB is referenced in the Accomplishment 
Instructions in Jetstream Series 3100/3200 Alert Service Bulletin 
No. 32-JA 960601, Revision No. 1, April 11, 1997, Original Issue, 
October 25, 1996.

    (1) Prior to further flight, replace the NLG toggle bracket lugs 
and axle bracket lugs, if the measurements of the outer wall 
thickness do not meet the criteria set out in the Table contained in 
paragraph B. (5) of the Accomplishment Instructions section in APPH 
Precision Hydraulics SB No. 32-66, as referenced in paragraph (b) of 
this AD.
    (2) If the measurements of the outer wall thickness are within 
the criteria set out in the Table contained in paragraph B. (5) of 
the Accomplishment Instructions section in APPH Precision Hydraulics 
SB 32-66, as referenced in paragraph (b) of this AD, replace the NLG 
toggle bracket lugs and axle bracket lugs at the end of the fatigue 
life limits of the part, as specified in the Table referenced above, 
or within the next 50 landings after the measurement is taken, 
whichever occurs later.

    Note 3: The compliance time in this AD takes precedence over the 
compliance times published in the applicable service bulletins.
    (c) Special flight permits may be issued in accordance with 
sections 21.197 and 21.199 of the Federal Aviation Regulations (14 
CFR 21.197 and 21.199) to operate the airplane to a location where 
the requirements of this AD can be accomplished.
    (d) An alternative method of compliance or adjustment of the 
compliance time that provides an equivalent level of safety may be 
approved by the Manager, Small Airplane Directorate, Aircraft 
Certification Service, 1201 Walnut, suite 900, Kansas City, Missouri 
64106. The request shall be forwarded through an appropriate FAA 
Maintenance Inspector, who may add comments and then send it to the 
Manager, Small Airplane Directorate.

    Note 4: Information concerning the existence of approved 
alternative methods of compliance with this AD, if any, may be 
obtained from the Small Airplane Directorate.

    (e) Questions or technical information related to the service 
information referenced in this AD should be directed to British 
Aerospace Regional Aircraft, Prestwick International Airport, 
Ayrshire, KA9 2RW, Scotland; telephone (01292) 79888; facsimile 
(01292) 671715. This service information may be examined at the FAA, 
Central Region, Office of the Regional Counsel, Room 1558, 601 E. 
12th Street, Kansas City, Missouri 64106.
    (f) The replacements required by this AD shall be done in 
accordance with Jetstream Series 3100/3200 Service Bulletin 30-JA 
950641, which incorporates the following pages:

------------------------------------------------------------------------
              Pages                 Revision level           Date       
------------------------------------------------------------------------
1...............................  Revision 1........  March 18, 1997.   
2 through 8.....................  Revision 2........  March 18, 1997.   
------------------------------------------------------------------------

    This service bulletin specifies following the procedures 
provided in Rosemount Aerospace Inc. Service Bulletin No. 2314M-30-
16, dated December, 1996;

--APPH Precision Hydraulics Service Bulletin No. 32-66, which 
incorporates the following pages:

------------------------------------------------------------------------
              Pages                 Revision level           Date       
------------------------------------------------------------------------
1, 3, 4, and 5..................  Revision 1........  October 1996.     
2 and 6.........................  Revision 2........  March 1997.       
------------------------------------------------------------------------

    This service bulletin is referenced in Accomplishment 
Instructions section of Jetstream Series 3100/3200 Alert Service 
Bulletin No. 32-JA 960601, Original Issue: October 25, 1996, 
Revision No. 1: dated April 11, 1997.
    (1) This incorporation by reference was approved by the Director 
of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR 
part 51.
    (2) Copies may be obtained from British Aerospace Regional 
Aircraft, Prestwick International Airport, Ayrshire, KA9 2RW, 
Scotland. Copies may be inspected at the FAA, Central Region, Office 
of the Regional Counsel, Room 1558, 601 E. 12th Street, Kansas City, 
Missouri, or at the Office of the Federal Register, 800 North 
Capitol Street, NW, suite 700, Washington, DC.

    Note 5: The subject of this AD is addressed in British AD 002-
10-96, not dated, for the nose landing gear condition; and British 
AD 006-08-96, not dated, for the windshield wiper condition.

    (g) This amendment becomes effective on July 28, 1998.

    Issued in Kansas City, Missouri, on June 3, 1998.
Ronald K. Rathgeber,
Acting Manager, Small Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 98-15360 Filed 6-11-98; 8:45 am]
BILLING CODE 4910-13-U

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