
[Federal Register: March 12, 2008 (Volume 73, Number 49)]
[Rules and Regulations]               
[Page 13115-13117]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr12mr08-18]                         

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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2008-0035; Directorate Identifier 2007-CE-103-AD; 
Amendment 39-15424; AD 2008-06-12]
RIN 2120-AA64

 
Airworthiness Directives; British Aerospace Regional Aircraft 
Model HP.137 Jetstream Mk.1, Jetstream Series 200, Jetstream Series 
3101, and Jetstream Model 3201 Airplanes

AGENCY: Federal Aviation Administration (FAA), Department of 
Transportation (DOT).

ACTION: Final rule.

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SUMMARY: We are adopting a new airworthiness directive (AD) for the 
products listed above. This AD results from mandatory continuing 
airworthiness information (MCAI) issued by an aviation authority of 
another country to identify and correct an unsafe condition on an 
aviation product. The MCAI describes the unsafe condition as:

    Two incidents have been reported where the normal hydraulic 
supplies were lost due to failure/loss of the steering jack gland 
housing. This has been attributed to pre-existing thread damage on 
the steering jack gland housing. Three previous failures may also be 
due to this failure mechanism.
    Failure of the steering jack gland housing resulted in 
significant damage to the right hand undercarriage bay door, and 
could result in the nose landing gear jamming in a fully or 
partially retracted position. Landing in such a condition is 
considered as potentially unsafe due to the degraded control of the 
aircraft post touch down.


[[Page 13116]]


We are issuing this AD to require actions to correct the unsafe 
condition on these products.

DATES: This AD becomes effective April 16, 2008.
    On April 16, 2008, the Director of the Federal Register approved 
the incorporation by reference of certain publications listed in this 
AD.

ADDRESSES: You may examine the AD docket on the Internet at http://
www.regulations.gov or in person at Document Management Facility, U.S. 
Department of Transportation, Docket Operations, M-30, West Building 
Ground Floor, Room W12-140, 1200 New Jersey Avenue, SE., Washington, DC 
20590.

FOR FURTHER INFORMATION CONTACT: Taylor Martin, Aerospace Engineer, 
FAA, Small Airplane Directorate, 901 Locust, Room 301, Kansas City, 
Missouri 64106; telephone: (816) 329-4138; fax: (816) 329-4090.

SUPPLEMENTARY INFORMATION:

Discussion

    We issued a notice of proposed rulemaking (NPRM) to amend 14 CFR 
part 39 to include an AD that would apply to the specified products. 
That NPRM was published in the Federal Register on January 18, 2008 (73 
FR 3428). That NPRM proposed to correct an unsafe condition for the 
specified products. The MCAI states:

    Two incidents have been reported where the normal hydraulic 
supplies were lost due to failure/loss of the steering jack gland 
housing. This has been attributed to pre-existing thread damage on 
the steering jack gland housing. Three previous failures may also be 
due to this failure mechanism.
    Failure of the steering jack gland housing resulted in 
significant damage to the right hand undercarriage bay door, and 
could result in the nose landing gear jamming in a fully or 
partially retracted position. Landing in such a condition is 
considered as potentially unsafe due to the degraded control of the 
aircraft post touch down.
    Changes to the gland have been introduced in order to prevent 
further recurrence.

    This AD requires you to install a serviceable steering jack.
    You may obtain further information by examining the MCAI in the AD 
docket.

Comments

    We gave the public the opportunity to participate in developing 
this AD. We received no comments on the NPRM or on the determination of 
the cost to the public.

Conclusion

    We reviewed the available data and determined that air safety and 
the public interest require adopting the AD as proposed.

Differences Between This AD and the MCAI or Service Information

    We have reviewed the MCAI and related service information and, in 
general, agree with their substance. But we might have found it 
necessary to use different words from those in the MCAI to ensure the 
AD is clear for U.S. operators and is enforceable. In making these 
changes, we do not intend to differ substantively from the information 
provided in the MCAI and related service information.
    We might also have required different actions in this AD from those 
in the MCAI in order to follow FAA policies. Any such differences are 
highlighted in a Note within the AD.

Costs of Compliance

    Based on the service information, we estimate that this AD affects 
about 149 products of U.S. registry. We also estimate that it will take 
about 10 work-hours per product to comply with the basic requirements 
of this AD. The average labor rate is $80 per work-hour. Required parts 
will cost about $100 per product.
    Based on these figures, we estimate the cost of this AD on U.S. 
operators to be $134,100, or $900 per product.

Authority for This Rulemaking

    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 
rulemaking action.

Regulatory Findings

    We 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.
    For the reasons discussed above, I certify this AD:
    (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.
    We prepared a regulatory evaluation of the estimated costs to 
comply with this AD and placed it in the AD Docket.

Examining the AD Docket

    You may examine the AD docket on the Internet at http://
www.regulations.gov; or in person at the Docket Management Facility 
between 9 a.m. and 5 p.m., Monday through Friday, except Federal 
holidays. The AD docket contains the NPRM, the regulatory evaluation, 
any comments received, and other information. The street address for 
the Docket Office (telephone (800) 647-5527) is in the ADDRESSES 
section. Comments will be available in the AD docket shortly after 
receipt.

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 FAA amends 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 adding the following new AD:

2008-06-12 British Aerospace Regional Aircraft: Amendment 39-15424; 
Docket No. FAA-2008-0035; Directorate Identifier 2007-CE-103-AD.

Effective Date

    (a) This airworthiness directive (AD) becomes effective April 
16, 2008.

Affected ADs

    (b) None.

Applicability

    (c) This AD applies to Model HP.137 Jetstream Mk.1, Jetstream 
Series 200,

[[Page 13117]]

Jetstream Series 3101, and Jetstream Model 3201 airplanes, all 
serial numbers, certificated in any category.

Subject

    (d) Air Transport Association of America (ATA) Code 32: Landing 
Gear.
    (e) The mandatory continuing airworthiness information (MCAI) 
states:

    Two incidents have been reported where the normal hydraulic 
supplies were lost due to failure/loss of the steering jack gland 
housing. This has been attributed to pre-existing thread damage on 
the steering jack gland housing. Three previous failures may also be 
due to this failure mechanism.
    Failure of the steering jack gland housing resulted in 
significant damage to the right hand undercarriage bay door, and 
could result in the nose landing gear jamming in a fully or 
partially retracted position. Landing in such a condition is 
considered as potentially unsafe due to the degraded control of the 
aircraft post touch down.
    Changes to the gland have been introduced in order to prevent 
further recurrence.

This AD requires you to install a serviceable steering jack.

Actions and Compliance

    (f) Unless already done, within the next 12 months after April 
16, 2008 (the effective date of this AD), install a serviceable 
steering jack that has been modified following APPH Ltd. Service 
Bulletin 32-78, dated February 2005, as specified in British 
Aerospace Jetstream Series 3100 and 3200 Service Bulletin 32-JM5417, 
Original Issue: March 22, 2005.

FAA AD Differences

    Note: This AD differs from the MCAI and/or service information 
as follows: No differences.

Other FAA AD Provisions

    (g) The following provisions also apply to this AD:
    (1) Alternative Methods of Compliance (AMOCs): The Manager, 
Standards Office, FAA, has the authority to approve AMOCs for this 
AD, if requested using the procedures found in 14 CFR 39.19. Send 
information to Attn: Taylor Martin, Aerospace Engineer, FAA, Small 
Airplane Directorate, 901 Locust, Room 301, Kansas City, Missouri 
64106; telephone: (816) 329-4138; fax: (816) 329-4090. Before using 
any approved AMOC on any airplane to which the AMOC applies, notify 
your appropriate principal inspector (PI) in the FAA Flight 
Standards District Office (FSDO), or lacking a PI, your local FSDO.
    (2) Airworthy Product: For any requirement in this AD to obtain 
corrective actions from a manufacturer or other source, use these 
actions if they are FAA-approved. Corrective actions are considered 
FAA-approved if they are approved by the State of Design Authority 
(or their delegated agent). You are required to assure the product 
is airworthy before it is returned to service.
    (3) Reporting Requirements: For any reporting requirement in 
this AD, under the provisions of the Paperwork Reduction Act (44 
U.S.C. 3501 et seq.), the Office of Management and Budget (OMB) has 
approved the information collection requirements and has assigned 
OMB Control Number 2120-0056.

Related Information

    (h) Refer to MCAI European Aviation Safety Agency (EASA) AD No. 
2006-0128, dated May 18, 2006, and British Aerospace Jetstream 
Series 3100 and 3200 Service Bulletin 32-JM5417, Original Issue: 
March 22, 2005, for related information.

Material Incorporated by Reference

    (i) You must use British Aerospace Jetstream Series 3100 and 
3200 Service Bulletin 32-JM5417, Original Issue: March 22, 2005, and 
APPH Ltd. Service Bulletin 32-78, dated February 2005, to do the 
actions required by this AD, unless the AD specifies otherwise.
    (1) The Director of the Federal Register approved the 
incorporation by reference of this service information under 5 
U.S.C. 552(a) and 1 CFR part 51.
    (2) For service information identified in this AD, contact 
British Aerospace, BAE Systems, Prestwick International Airport, 
Ayrshire KA9 2RW, Scotland, telephone: (01292) 675207; fax: (01292) 
675704.
    (3) You may review copies at the 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/cfr/ibr-locations.html.

    Issued in Kansas City, Missouri, on March 4, 2008.
David R. Showers,
Acting Manager, Small Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. E8-4647 Filed 3-11-08; 8:45 am]

BILLING CODE 4910-13-P
