[Federal Register: February 5, 2008 (Volume 73, Number 24)]
[Rules and Regulations]
[Page 6590-6592]
[DOCID:fr05fe08-7]

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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2007-0299; Directorate Identifier 2007-NM-239-AD;
Amendment 39-15358; AD 2008-03-08]
RIN 2120-AA64

Airworthiness Directives; Saab Model SAAB 2000 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) originated 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:

    Subsequent to accidents involving Fuel Tank System explosions in
flight * * * and on ground, the FAA has published Special Federal
Aviation Regulation 88 (SFAR88) * * * [which] required * * *
[conducting] a design review against explosion risks.

    The unsafe condition is the potential of ignition sources inside
fuel tanks, which, in combination with flammable fuel vapors, could
result in fuel tank explosions and consequent loss of the airplane. We
are issuing this AD to require actions to correct the unsafe condition
on these products.

DATES: This AD becomes effective March 11, 2008.
    The Director of the Federal Register approved the incorporation by
reference of certain publications listed in this AD as of March 11,
2008.

ADDRESSES: You may examine the AD docket on the Internet at http://www.regulations.gov
 or in person at the U.S. Department of

Transportation, Docket Operations, M-30, West Building Ground Floor,
Room W12-140, 1200 New Jersey Avenue, SE., Washington, DC.

FOR FURTHER INFORMATION CONTACT: Shahram Daneshmandi, Aerospace
Engineer, International Branch, ANM-116, Transport Airplane
Directorate, FAA, 1601 Lind Avenue, SW., Renton, Washington 98057-3356;
telephone<PHONE_NUMBER>; fax<PHONE_NUMBER>.

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 December 10, 2007
(72 FR 69628). That NPRM proposed to correct an unsafe condition for
the specified products. The MCAI states:

    Subsequent to accidents involving Fuel Tank System explosions in
flight * * * and on ground, the FAA has published Special Federal
Aviation Regulation 88 (SFAR88) in June 2001.
    In their Letters referenced 04/00/02/07/01-L296 dated March 4th,
2002 and 04/00/02/07/03-L024, dated February 3rd, 2003, the JAA
(Joint Aviation Authorities) recommended the application of a
similar regulation to the National Aviation Authorities (NAA).
    Under this regulation, all holders of type certificates for
passenger transport aircraft with either a passenger capacity of 30
or more, or a payload capacity of 7,500 pounds (3402 kg) or more,
which have received their certification since January 1st, 1958, are
required to conduct a design review against explosion risks.
    This Airworthiness Directive (AD), which renders mandatory the
modification [6089] of improving the sealing of Fuel Access Doors,
is a consequence of the design review.

The unsafe condition is the potential of ignition sources inside fuel
tanks, which, in combination with flammable fuel vapors, could result
in fuel tank explosions and consequent loss of the airplane. Saab
Modification 6089 includes removing the fuel tank access doors and the
old type of clamp rings and gaskets; installing new, improved clamp
rings; re-installing the fuel tank access doors; and doing related
investigative actions and applicable corrective actions. Related
investigative actions and applicable corrective actions include
inspecting for corrosion of the wing skin panel and access door areas,
and, as applicable, replacing wear protection; contacting Saab and
doing repairs if doubler flange is less than specified thickness;
replacing any corroded or damaged foil panel; replacing any damaged
sealing ring; removing corrosion from the wing skin panel; inspecting
the access doors for damage and correct installation of the aluminum
panel on the access door; and, as applicable, replacing the aluminum
panel or the entire access door. 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 our FAA policies. Any such differences
are highlighted in a NOTE within the AD.

Costs of Compliance

    We estimate that this AD will affect about 6 products of U.S.
registry. We also estimate that it will take about 130 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 $6,400
per product. Where the service information lists required parts costs
that are covered under warranty, we have assumed that there will be no
charge for these parts. As we do not control warranty coverage for
affected parties, some parties may incur costs higher than estimated
here. Based on these figures, we estimate the cost of this AD to the
U.S. operators to be $100,800, or $16,800 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 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 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 Operations office

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 Operations office (telephone<PHONE_NUMBER>) 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:

2008-03-08 SAAB Aircraft AB: Amendment 39-15358. Docket No. FAA-
2007-0299; Directorate Identifier 2007-NM-239-AD.

Effective Date

    (a) This airworthiness directive (AD) becomes effective March
11, 2008.

Affected ADs

    (b) None.

Applicability

    (c) This AD applies to Saab Model SAAB 2000 airplanes, all
serial numbers, certificated in any category.

Subject

    (d) Air Transport Association (ATA) of America Code 57: Wings.

Reason

    (e) The mandatory continuing airworthiness information (MCAI)
states:

    Subsequent to accidents involving Fuel Tank System explosions in
flight * * * and on ground, the FAA has published Special Federal
Aviation Regulation 88 (SFAR88) in June 2001.
    In their Letters referenced 04/00/02/07/01-L296 dated March 4th,
2002 and 04/00/02/07/03-L024, dated February 3rd, 2003, the JAA
(Joint Aviation Authorities) recommended the application of a
similar regulation to the National Aviation Authorities (NAA).
    Under this regulation, all holders of type certificates for
passenger transport aircraft with either a passenger capacity of 30
or more, or a payload capacity of 7,500 pounds (3402 kg) or more,
which have received their certification since January 1st, 1958, are
required to conduct a design review against explosion risks.
    This Airworthiness Directive (AD), which renders mandatory the
modification [6089] of improving the sealing of Fuel Access Doors,
is a consequence of the design review.

The unsafe condition is the potential of ignition sources inside
fuel tanks, which, in combination with flammable fuel vapors, could
result in fuel tank explosions and consequent loss of the airplane.

Actions and Compliance

    (f) Within 48 months after the effective date of this AD, unless
already done, do Modification 6089 and all related investigative
actions and applicable corrective actions, in accordance with the
Accomplishment Instructions of Saab Service Bulletin 2000-57-033,
dated March 2, 2000; or Revision 01, dated March 31, 2000. Do all
applicable related investigative and corrective actions before
further flight.

FAA AD Differences

    Note 1: 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,
International Branch, ANM-116, Transport Airplane Directorate, 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:
Shahram Daneshmandi, Aerospace Engineer, International Branch, ANM-
116, Transport Airplane Directorate, FAA, 1601 Lind Avenue SW.,
Renton, Washington 98057-

3356; telephone<PHONE_NUMBER>; fax<PHONE_NUMBER>. 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, 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 EASA Airworthiness Directive 2007-0167, dated
June 15, 2007; Saab Service Bulletin 2000-57-033, dated March 2,
2000; and Saab Service Bulletin 2000-57-033, Revision 01, dated
March 31, 2000; for related information.

Material Incorporated by Reference

    (i) You must use Saab Service Bulletin 2000-57-033, dated March
2, 2000; or Saab Service Bulletin 2000-57-033, Revision 01, dated
March 31, 2000; 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 Saab
Aircraft AB, SAAB Aircraft Product Support, S-581.88,
Link[ouml]ping, Sweden.
    (3) You may review copies at the FAA, Transport Airplane
Directorate, 1601 Lind Avenue SW., Renton, Washington; or at the
National Archives and Records Administration (NARA). For information
on the availability of this material at NARA, call<PHONE_NUMBER>,
or go to: http://www.archives.gov/federal-register/cfr/ibr-locations.html
.

    Issued in Renton, Washington, on January 24, 2008.
Ali Bahrami,
Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. E8-1812 Filed 2-4-08; 8:45 am]

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