AD 2010-16-06 Airworthiness Directives; The Boeing Company Model 737-300, -400, -500, -600, -700, and -800 Series Airplanes

Models named: 737-300, -400, -500 series, 737-600, -700, -800 series. Read the applicability below — it usually turns on serial or part numbers too.

This AD applies to the airplanes identified in paragraphs (c)(1) and (c)(2) of this AD, certificated in any category. (1) The Boeing Company Model 737-300, -400, and -500 series airplanes, as identified in Boeing Service Bulletin 737-35A1053, Revision 1, dated June 1, 2000. (2) The Boeing Company Model 737-600, -700, and -800 series airplanes, as identified in Boeing Service Bulletin 737-35A1058, Revision 1, dated June 1, 2000.

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 and Replacement (g) Within 36 months after the effective date of this AD, do an inspection to determine whether any low-pressure flex-hose of the crew oxygen system installed under the oxygen mask stowage box in the flight deck has a part number identified in Table 1 or Table 2 of this AD, as applicable. 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 crew oxygen system can be conclusively determined from that review. (1) For any hose having a part number identified in Table 1 or Table 2 of this AD, as applicable, before further flight, replace the hose with a new or serviceable part, in accordance with the Accomplishment Instructions of Boeing Service Bulletin 737-35A1053, Revision 1, dated June 1, 2000; or Boeing Service Bulletin 737-35A1058, Revision 1, dated June 1, 2000; as applicable. (2) For any hose not having a part number identified in Table 1 or Table 2 of this AD no further action is required by this paragraph. Table 1—Applicable Part Numbers for Model 737-300, -400, and -500 Series Airplanes Boeing specification part No. Equivalent Boeing supplier part Nos. Puritan bennett Hydraflow 10-60174-31 173470-31 37001-31 10-60174-35 173470-35 37001-35 10-60174-46 Not Applicable 37001-46 60B50059-99 Not Applicable 38001-99 Table 2—Applicable Part Numbers for Model 737-600, -700, and -800 Series Airplanes Boeing specification part No. Equivalent Boeing supplier part Nos. Puritan bennett Hydraflow 10-60174-31 173470-31 37001-31 10-60174-35 173470-35 37001-35 60B50059-124 Not Applicable 38001-124 Parts Installation (h) As of the effective date of this AD, no person may install a crew oxygen hose with a part number identified in Table 1 or Table 2 of this AD, as applicable, on any airplane. Actions Accomplished According to Previous Issue of Service Bulletins (i) Actions accomplished before the effective date of this AD in accordance with Boeing Alert Service Bulletin 737-35A1053, dated September 2, 1999; or Boeing Alert Service Bulletin 737-35A1058, dated September 2, 1999; as applicable; 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: Susan L. Monroe, Aerospace Engineer, Cabin Safety and Environmental Systems Branch, ANM-150S, FAA, Seattle Aircraft Certification Office, 1601 Lind Avenue SW., Renton, Washington 98057-3356; telephone (425) 917-6457; 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 737-35A1053, Revision 1, dated June 1, 2000; or Boeing Service Bulletin 737-35A1058, Revision 1, dated June 1, 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. (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 16, 2010. Ali Bahrami, Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 2010-18624 Filed 8-4-10; 8:45 am] BILLING CODE 4910-13-P

This AD results from reports of low-pressure flex-hoses of the crew oxygen system that burned through due to inadvertent electrical current from a short circuit in the audio select panel. The Federal Aviation Administration is issuing this AD to prevent inadvertent electrical current, which can cause the low-pressure flex-hoses of the crew oxygen system to melt or burn, resulting in oxygen system leakage and smoke or fire.