AD 2010-06-17 Airworthiness Directives; The Boeing Company Model 757 Airplanes

Models named: 757-200, -200CB, -200PF, -300 series. Read the applicability below — it usually turns on serial or part numbers too.

This AD applies to The Boeing Company Model 757-200, -200CB, -200PF, and -300 series airplanes, certificated in any category; as identified in the service bulletins listed in Table 1 of this AD. Table 1—Applicability Boeing Service Bulletin Revision Dated Applicable model/series 757-35A0015 2 June 15, 2000 757-200, 757-200CB, 757-200PF. 757-35A0016 1 June 15, 2000 757-300.

You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done. Inspection (g) Within 36 months after the effective date of this AD, inspect to determine whether any low-pressure flex-hose of the flightcrew and supernumerary oxygen systems installed under the oxygen mask stowage location has a part number identified in Table 2 of this AD. A review of airplane maintenance records is acceptable in lieu of this inspection if the part number of the low-pressure flex-hoses of the flightcrew and supernumerary oxygen system can be conclusively determined from that review. (1) For any low-pressure flex-hose having a part number identified in Table 2 of this AD, before further flight, replace the hose with a new or serviceable part, in accordance with the Accomplishment Instructions of the applicable service bulletin identified in Table 1 of this AD. Recording the part number of the hose being replaced is not required by this AD. (2) For any low-pressure flex-hose not having a part number identified in Table 2 of this AD, no further action is required by this paragraph. Parts Installation (h) As of the effective date of this AD, no person may install a flightcrew or supernumerary oxygen hose with a part number identified in Table 2 of this AD on any airplane. Table 2—Applicable Part Numbers Boeing specification part No.— Equivalent Boeing supplier part numbers— Sierra Engineering Spencer Fluid Puritan Bennett Hydraflow AVOX (formerly Sierra Engineering) 60B50059-70 835-01-70 9513-20S5-18.0 ZH784-20 38001-70 9513-835-01-70 60B50059-81 835-01-81 9513-20S5-24.0 ZH784-81 38001-81 9513-835-01-81 Actions Accomplished According to Previous Issue of Service Bulletin (i) Actions accomplished before the effective date of this AD in accordance with Boeing Alert Service Bulletin 757-35A0015, dated September 2, 1999, or Revision 1, dated November 11, 1999; or Boeing Alert Service Bulletin 757-35A0016, dated November 11, 1999; are considered acceptable for compliance with the corresponding actions specified in this AD. Alternative Methods of Compliance (AMOCs) (j)(1) The Manager, Seattle Aircraft Certification Office (ACO), 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: Nicholas Wilson, Aerospace Engineer, Cabin Safety and Environmental Systems Branch, ANM-150S, FAA, Seattle ACO, 1601 Lind Avenue, SW., Renton, Washington 98057-3356; telephone (425) 917-6476; fax (425) 917-6590. Or, e-mail information 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 (k) You must use Boeing Service Bulletin 757-35A0015, Revision 2, dated June 15, 2000; or Boeing Service Bulletin 757-35A0016, Revision 1, dated June 15, 2000; 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 or 425-227-1152. (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 March 9, 2010. Jeffrey E. Duven, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 2010-5857 Filed 3-26-10; 8:45 am] BILLING CODE 4910-13-P

This AD results from reports of a low-pressure flex-hose of a flightcrew oxygen system that burned through due to inadvertent electrical current from a short circuit in an adjacent audio select panel. We are issuing this AD to prevent inadvertent electrical current which can cause the low-pressure flex-hoses used in the flightcrew and supernumerary oxygen system to melt or burn, resulting in oxygen system leakage and smoke or fire.