AD 2010-16-12 Airworthiness Directives; The Boeing Company Model 777-200LR and -300ER Series Airplanes Equipped with GE90-100 Series Engines

Models named: 777-200LR, -300ER series. Read the applicability below — it usually turns on serial or part numbers too.

This AD applies to The Boeing Company Model 777-200LR and -300ER series airplanes, certificated in any category; as identified in Boeing Alert Service Bulletin 777-78A0070, dated November 20, 2008.

You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done. Fastener Replacement (g) Within 180 days or 300 flight cycles after the effective date of this AD, whichever is later: Replace the insulation blanket fasteners of the lower aft cowl of the thrust reverser, in accordance with the Accomplishment Instructions of Boeing Alert Service Bulletin 777-78A0070, dated November 20, 2008. Inspect and Replace (h) Before or concurrently with accomplishing the requirements in paragraph (g) of this AD: Do a detailed inspection of the oil scavenge tube on the turbine rear frame of the engine for damage, in accordance with the Accomplishment Instructions of General Electric GE90-100 Service Bulletin 79-0017, dated March 3, 2008. If any damage is found, before further flight, replace the tube, in accordance with the Accomplishment Instructions of General Electric GE90-100 Service Bulletin 79-0017, dated March 3, 2008. Note 1: For the purposes of this AD, a detailed inspection is: “An intensive examination of a specific item, installation, or assembly to detect damage, failure, or irregularity. Available lighting is normally supplemented with a direct source of good lighting at an intensity deemed appropriate. Inspection aids such as mirror, magnifying lenses, etc., may be necessary. Surface cleaning and elaborate procedures may be required.” Alternative Methods of Compliance (AMOCs) (i)(1) The Manager, Seattle Aircraft Certification 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: Margaret Langsted, Aerospace Engineer, Propulsion Branch, ANM-140S, FAA, Seattle Aircraft Certification Office, 1601 Lind Avenue, SW., Renton, Washington 98057-3356; telephone (425) 917-6500; fax (425) 917-6590. Information may be e-mailed to: 9-ANM-Seattle-ACO-AMOC-Requests@faa.gov. (2) To request a different method of compliance or a different compliance time for this AD, follow the procedures in 14 CFR 39.19. Before using any approved AMOC on any airplane to which the AMOC applies, notify your principal maintenance inspector (PMI) or principal avionics inspector (PAI), as appropriate, or lacking a principal inspector, your local Flight Standards District Office. The AMOC approval letter must specifically reference this AD. Material Incorporated by Reference (j) You must use Boeing Alert Service Bulletin 777-78A0070, dated November 20, 2008; and General Electric GE90-100 Service Bulletin 79-0017, dated March 3, 2008; as applicable; 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 Boeing Commercial Airplanes, Attention: Data & Services Management, P.O. Box 3707, MC 2H-65, Seattle, Washington 98124-2207; telephone 206-544-5000, extension 1, fax 206-766-5680; e-mail me.boecom@boeing.com; Internet https://www.myboeingfleet.com. (3) You may review copies of the service information at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington. For information on the availability of this material at the FAA, call 425-227-1221. (4) You may also review copies of the service information that is incorporated by reference 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/code_of_federal_regulations/ibr_locations.html. Issued in Renton, Washington, on July 27, 2010. Ali Bahrami, Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 2010-19293 Filed 8-12-10; 8:45 am] BILLING CODE 4910-13-P

This AD results from a determination of insufficient clearance and subsequent interference between the oil scavenge tube on the turbine rear frame of the engine and the bolt on the aft cowl insulation blanket of the thrust reverser. The Federal Aviation Administration is issuing this AD to prevent damage and possible puncture of the oil scavenge tube and consequent oil loss, which could result in an in-flight shutdown of the engine.