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Airworthiness Directives: ATR Model ATR42 and ATR72 Airplanes - February 28, 2008 - Regulations - VLEX 37857487
Airworthiness Directives: ATR Model ATR42 and ATR72 Airplanes
Page 10652-10655
DOCID:fr28fe08-6
Docket No. FAA-2007-29332; Directorate Identifier 2007-NM-172-AD;
Amendment 39-15391; AD 2008-04-19
Subsequent to accidents involving Fuel Tank System explosions in flight * * * and on ground, * * * Special Federal Aviation
Regulation 88 (SFAR88) * * * required a safety review of the aircraft Fuel Tank System * * *.
Fuel Airworthiness Limitations are items arising from a systems safety analysis that have been shown to have failure mode(s) associated with an `unsafe condition' * * *. These are identified in
Failure Conditions for which an unacceptable probability of ignition risk could exist if specific tasks and/or practices are not performed in accordance with the manufacturers' requirements.
The Director of the Federal Register approved the incorporation by reference of certain publications listed in this AD as of April 3, 2008.
Transportation, Docket Operations, M-30, West
International Branch, ANM-116, FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington 98057-3356; telephone (425) 227-1137; fax (425) 227-1149.
That NPRM was published in the Federal Register on September 28, 2007
(72 FR 55113). 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 published Special Federal
Aviation Regulation 88 (SFAR 88) in June 2001. SFAR 88 required a safety review of the aircraft Fuel Tank System to determine that the design meets the requirements of FAR (Federal Aviation Regulations)
Sec. 25.901 and Sec. 25.981(a) and (b).
A similar regulation has been recommended by the JAA (Joint
Aviation Authorities) to the European National Aviation Authorities in JAA letter 04/00/02/07/03-L024 of 3 February 2003. The review was requested to be mandated by NAA's (National Aviation Authorities) using JAR (Joint Aviation Regulation) Sec. 25.901(c), Sec. 25.1309.
In August 2005 EASA published a policy statement on the process for developing instructions for maintenance and inspection of Fuel
Tank System ignition source prevention (EASA D 2005/CPRO, www.easa.eu.int/home/cert_policy_statements_en.html) that also included the EASA expectations with regard to compliance times of the corrective actions on the unsafe and the not unsafe part of the harmonised design review results. On a global scale the TC (type certificate) holders committed themselves to the EASA published compliance dates (see EASA policy statement). The EASA policy statement has been revised in March 2006: The date of 31-12-2005 for the unsafe related actions has now been set at 01-07-2006.
Fuel Airworthiness Limitations are items arising from a systems safety analysis that have been shown to have failure mode(s) associated with an `unsafe condition' as defined in FAA's memo 2003- 112-15 `SFAR 88--Mandatory Action Decision Criteria'. These are identified in Failure Conditions for which an unacceptable probability of ignition risk could exist if specific tasks and/or practices are not performed in accordance with the manufacturers' requirements.
This EASA Airworthiness Directive mandates the Fuel System
Airworthiness Limitations (comprising maintenance/inspection tasks and Critical Design Configuration Control Limitations (CDCCL)) for the type of aircraft, that resulted from the design reviews and the
JAA recommendation and EASA policy statement mentioned above.
The corrective action is revising the Airworthiness Limitations
Section of the Instructions for Continued Airworthiness to incorporate new limitations for fuel tank systems. You may obtain further information by examining the MCAI in the AD docket.
For standardization purposes, we have revised paragraph (f)(4) of this AD to specify that no alternative inspections, inspection intervals, or CDCCLs may be used unless they are part of a later approved revision of ATR 42-200/-300/-320 Maintenance Review Board
Report (MRBR), Revision 7, dated March 31, 2006; ATR 42-400/-500 MRBR,
Revision 6, dated March 26, 2007; or ATR 72 MRBR, Revision 8, dated
March 26, 2007; as applicable; or unless they are approved as an alternative method of compliance. Inclusion of this paragraph in the AD is intended to ensure that the AD-mandated airworthiness limitations changes are treated the same as the airworthiness limitations issued with the original type certificate.
We reviewed the available data and determined that air safety and the public interest require adopting the AD as proposed with the change described previously. We determined that this change will not increase the economic burden on any operator or increase the scope of the AD.
We estimate that this AD will affect about 84 products of U.S. registry. We also estimate that it will take about 1 work-hour per product to comply with the basic requirements of this AD. The average labor rate is $80 per work-hour. Based on these figures, we estimate the cost of this AD to the U.S. operators to be $6,720, or $80 per product.
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 (800) 647-5527) is in the ADDRESSES section. Comments will be available in the AD docket shortly after receipt.
Sec. 39.13 [Amended] 0 2. The FAA amends Sec. 39.13 by adding the following new AD: 2008-04-19 ATR--GIE Avions de Transport R[eacute]gional (Formerly
Aerospatiale): Amendment 39-15391. Docket No. FAA-2007-29332;
Directorate Identifier 2007-NM-172-AD.
(a) This airworthiness directive (AD) becomes effective April 3, 2008.
(c) This AD applies to all ATR Model ATR42-200, -300, -320, and
-500 airplanes; and all ATR Model ATR72-101, -201, -102, -202, -211,
-212, and -212A airplanes; certificated in any category.
Note 1: This AD requires revisions to certain operator maintenance documents to include new inspections. Compliance with these inspections is required by 14 CFR 91.403(c). For airplanes that have been previously modified, altered, or repaired in the areas addressed by these inspections, the operator may not be able to accomplish the inspections described in the revisions. In this situation, to comply with 14 CFR 91.403(c), the operator must request approval for an alternative method of compliance according to paragraph (g) of this AD. The request should include a description of changes to the required inspections that will ensure the continued operational safety of the airplane.
Aviation Regulation 88 (SFAR 88) in June 2001. SFAR 88 required a safety review of the aircraft Fuel Tank System to determine that the design meets the requirements of FAR (Federal Aviation Regulation)
Section of the Instructions for Continued Airworthiness to incorporate new limitations for fuel tank systems.
(1) Within 3 months after the effective date of this AD, or before December 16, 2008, whichever occurs first, revise the
Airworthiness Limitations Section (ALS) of the Instructions for
Continued Airworthiness to incorporate Task 28.10.00 ``Fuel Tank--
General,'' and Task 28.20.00 ``Distribution,'' of the Certification
Maintenance Requirements (CMR) Section of the Time Limits Section of
Part 1 of the ATR 42-200/-300/-320 Maintenance Review Board Report
(MRBR), Revision 7, dated March 31, 2006; the ATR 42-400/-500 MRBR,
Revision 6, dated March 26, 2007; or the ATR 72 MRBR, Revision 8, dated March 26, 2007; as applicable. For all tasks identified in the applicable MRBR, the initial compliance times start from the later of the times specified in paragraphs (f)(1)(i) and (f)(1)(ii) of this AD, except as provided by paragraphs (f)(3) and (g) of this AD.
The repetitive inspections must be accomplished thereafter at the interval specified in the applicable MRBR.
(ii) The date of issuance of the original French standard airworthiness certificate or the date of issuance of the original
French export certificate of airworthiness.
(2) Within 3 months after the effective date of this AD, or before December 16, 2008, whichever occurs first, revise the ALS of the Instructions for Continued Airworthiness to incorporate the
CDCCLs as defined in Section 4., ``Critical Design Configuration
Control List,'' of the Airworthiness Limitations Section of the Time
Limits Section of Part 1 of the ATR 42-200/-300/-320 MRBR, Revision 7, dated March 31, 2006; the ATR 42-400/-500 MRBR, Revision 6, dated
March 26, 2007; or the ATR 72 MRBR, Revision 8, dated March 26, 2007; as applicable.
(3) For the task titled ``Detailed visual inspection of the fuel tanks and associated equipment, wiring, piping and braids'' (CMR task reference 28.10.00-1): The initial compliance time is the later of the times specified in paragraphs (f)(3)(i) and (f)(3)(ii) of this AD. Thereafter, the task titled ``Detailed visual inspection of the fuel tanks and associated equipment, wiring, piping and braids'' must be accomplished at the repetitive interval specified in Section 4., ``Critical Design Configuration Control List,'' of the
Airworthiness Limitations Section of the Time Limits Section of Part 1 of the ATR 42-200/-300/-320 MRBR, Revision 7, dated March 31, 2006; the ATR 42-400/-500 MRBR, Revision 6, dated March 26, 2007; or the ATR 72 MRBR, Revision 8, dated March 26, 2007; as applicable.
(i) Within 144 months since the date of issuance of the original
French standard airworthiness certificate or the date of issuance of the original French export certificate of airworthiness.
(ii) Within 72 months or 20,000 flight hours after the effective date of this AD, whichever occurs first.
(4) After accomplishing the actions specified in paragraphs
(f)(1), (f)(2), and (f)(3) of this AD, no alternative inspection, inspection intervals, or CDCCLs may be used unless the inspections, intervals, or CDCCLs are part of a later revision of the ATR 42-200/
-300/-320 MRBR, Revision 7, dated March 31, 2006; ATR 42-400/-500
MRBR, Revision 6, dated March 26, 2007; or ATR 72 MRBR, Revision 8, dated March 26, 2007; as applicable; that is approved by the
Manager, International Branch, ANM-116, Transport Airplane
Directorate, FAA, or the European Aviation Safety Agency (EASA) (or its delegated agent); or unless the inspections,
intervals, or CDCCLs are approved as an alternative method of compliance (AMOC) in accordance with the procedures specified in paragraph (g) of this AD.
Note 2: This AD differs from the MCAI and/or service information as follows: No differences.
(1) 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: Tom Rodriguez, Aerospace Engineer,
International Branch, ANM-116, FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington 98057-3356; telephone
(425) 227-1137; fax (425) 227-1149. 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
(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.
(h) Refer to MCAI EASA Airworthiness Directive 2006-0219R1, dated June 29, 2007, and the service information identified in Table 1 of this AD, for related information.
Table 1.--Service Information
Time Limits Section of Part 1 of the ATR 42-200/-300/-320
7 March 31, 2006.
Maintenance Review Board Report.
Time Limits Section of Part 1 of the ATR 42-400/-500
6 March 26, 2007.
Time Limits Section of Part 1 of the ATR 72 Maintenance
8 March 26, 2007.
Review Board Report.
Table 2.--Material Incorporated by Reference
The missing page number for the ``List of Effective Pages'' of the Time Limits Section of Part 1 of the ATR 42-200/-300/-320
Maintenance Review Board Report is 1-LEP. The ``List of Effective
Pages'' for the Time Limits Section of Part 1 of the ATR 42-400/-500
Maintenance Review Board Report contains a typographical error: The date for Page 3 should read March 2007. The first page of the
``Reasons for Revisions'' section of the Time Limits Section of Part 1 of the ATR 72 Maintenance Review Board Report is incorrectly identified as Page 2-RFR; that page should be identified as Page 1-
(3) You may review copies at the FAA, Transport Airplane
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.
FR Doc. E8-3401 Filed 2-27-08; 8:45 am