2008-19-06 EADS SOCATA: Amendment 39-15673; Docket No. FAA-2008- 0974; Directorate Identifier 2008-CE-048-AD.
Effective Date
(a) This airworthiness directive (AD) becomes effective October 8, 2008.
Affected ADs
(b) None.
Applicability
(c) This AD applies to Models TBM 700 airplanes, all serial numbers beginning with 434, certificated in any category.
Subject
(d) Air Transport Association of America (ATA) Code 24: Electric Power.
Reason
(e) The mandatory continuing airworthiness information (MCAI) states:
"Following the rupture of an alternator and vapour cycle cooling system pulley drive assembly, the AD 2008-0067-E had been published to require the replacement of the pulley drive assembly by a new one of an improved design.
Recent cases of rupture of the alternator and vapour cycle cooling system compressor drive shaft and of cracks on the standby- alternator and compressor support have reportedly been found.
Such failures could lead to the loss of the alternator and of the vapour cycle cooling systems, and could also cause mechanical damage inside the powerplant compartment.
To address this condition, this AD supersedes AD 2008-0067-E and mandates the removal, as a temporary measure, of the compressor drive belt and of the torque limiter, the conditional replacement of the pulley drive shear shaft, and repetitive inspections for cracks of the pulley drive assembly and of the alternator/compressor support.
Revision 1 of this AD introduces an alternative temporary solution with the aim to restore the capability to make use of the air conditioning system. This solution consists in replacing the original pulley drive assembly by a time-limited assembly of a new design, corresponding to the EADS SOCATA modification MOD 70-0240- 21.''
A definitive solution is still under consideration to correct this condition.
Actions and Compliance
(f) Unless already done, for airplanes S/N 434 through459 only, before further flight after October 8, 2008 (the effective date of this AD), do the following actions following EADS SOCATA Mandatory TBM Aircraft Alert Service Bulletin SB 70-161, amendment 2, dated July 2008:
(1) Remove the pulley drive assembly, the torque limiter, the compressor drive belt, and the alternator/compressor support.
(2) Inspect for cracks on the pulley drive surfaces and the alternator/compressor support welds.
(i) If any crack is detected, replace the pulley drive assembly or conditionally repair the cracked unit following the accomplishment instructions in section D.2 of EADS SOCATA Mandatory TBM Aircraft Alert Service Bulletin SB 70-161, amendment 2, dated July 2008.
(ii) Replacement of the assembly incorporates replacement of the pulley drive sheer shaft required by paragraph (f)(3) of this AD for airplanes with 30 hours TIS or more with the torque limiter installed on the pulley drive shear shaft.
(3) Replace any pulley drive shear shaft that has accumulated 30 hours TIS or more with the torque limiter installed. This action is not required if you replaced the whole assembly per paragraph (f)(2)(i) of this AD.
(4) Re-install the pulley drive assembly and the alternator/ compressor support, without re-installing the compressor drive belt or the torque limiter.
(5) Install on the instrument panel and in the pilot's primary field of vision, the following placard:
"AIR COND'' INOPERATIVE
RECOMMENDED "AIR COND'' SWITCH POSITION: "MANUAL''
and insert EADS SOCATA Mandatory TBM Aircraft Alert Service Bulletin SB 70-161, amendment 2, dated July 2008 in the limitations section of the pilot's operating handbook.
(g) For all serial number airplanes;
(1) Within 100 hours TIS after October 8, 2008 (the effective date of this AD), and thereafter at intervals not to exceed 100 hours TIS, inspect for cracks on the pulley drive surfaces and the alternator/compressor support welds, following EADSSOCATA Mandatory TBM Aircraft Alert Service Bulletin SB 70-161, amendment 2, dated July 2008. For accomplishment of the repetitive inspections required by paragraph (g)(1) of this AD, paragraph C.2 of the accomplishment instructions of EADS SOCATA Mandatory TBM Aircraft Alert Service Bulletin SB 70-161, amendment 2, dated July 2008, does not apply since the torque limiter has already been removed.
(2) If cracks are found during any of these inspections, before further flight, replace the assembly or conditionally repair the unit following EADS SOCATA Mandatory TBM Aircraft Alert Service Bulletin SB 70-161, amendment 2, dated July 2008. The 100-hour TIS repetitive inspections are still required after replacement or repair.
(h) As an alternative to the requirements of paragraphs (f) and (g) of this AD, do the following actions before further flight after October 8, 2008 (the effective date of this AD), following EADS SOCATA Mandatory TBM Aircraft Alert Service Bulletin SB 70-161, amendment 3, dated July 2008:
(1) Install a zero-timed pulley drive assembly P/N T700G215510000000 following the accomplishment instructions in section D.1, I and J of EADS SOCATA Mandatory TBM Aircraft Alert Service Bulletin SB 70-161, amendment 3, dated July 2008.
(2) Within 100 hours TIS after the installation required in paragraph (h)(1) of this AD and repetitively thereafter at intervals not to exceed 100 TIS, inspect the alternator/compressor support welds for cracks following the accomplishment instructions in sections B,G, H, I, and J of EADS SOCATA Mandatory TBM Aircraft Alert Service Bulletin SB 70-161, amendment 3, dated July 2008.
(3) If any crack is detected in the inspection required in paragraph (h)(2) of this AD, before further flight, replace or repair the cracked unit following EADS SOCATA Mandatory TBM Aircraft Alert Service Bulletin SB 70-161, amendment 3, dated July 2008.
(4) Upon the accumulation of 400 hours TIS, replace each pulley driveassembly, P/N T700G215510000000, with a zero- timed one.
Note 1: Compliance with the requirements of paragraph (h) of this AD restores the capability to make use of the air conditioning system.
FAA AD Differences
Note 2: This AD differs from the MCAI and/or service information as follows: No differences.
Other FAA AD Provisions
(i) 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: Albert Mercado, Aerospace Engineer, FAA, Small Airplane Directorate, 901 Locust, Room 301, Kansas City, Missouri 64106; telephone: (816) 329-4119; 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
(j) Refer to MCAI EASA Emergency AD No.: 2008-0129R1-E, dated July 31, 2008; EADS SOCATA Mandatory TBM Aircraft Alert Service Bulletin SB 70-161, amendment 2, and EADS SOCATA Mandatory TBM Aircraft Alert Service Bulletin SB 70-161, amendment 3, both dated July 2008, for related information.Material Incorporated by Reference
(k) You must use EADS SOCATA Mandatory TBM Aircraft Alert Service Bulletin SB 70-161, amendment 2, or EADS SOCATA Mandatory TBM Aircraft Alert Service Bulletin SB 70-161, amendment 3, both dated July 2008, 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 EADS SOCATA--Direction des Services, 65921 Tarbes Cedex 9, France; telephone: +33 (0)5 62 41 73 00; fax: +33 (0)5 62 41 7-54; or in the United States contact EADS SOCATA North America, Inc., North Perry Airport, 7501 South Airport Road., Pembroke Pines, Florida 33023; telephone: (954) 893-1400; fax: (954) 964-4141.
(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.