2021-08-04: Oxygen

Adoption of the Amendment \n\n\n\tAccordingly, under the authority delegated to me by the Administrator, the FAA amends 14 CFR part 39 as follows: \n\nPART 39--AIRWORTHINESS DIRECTIVES \n\n0 1. The authority citation for part 39 continues to read as follows: \n\n\n\tAuthority: 49 U.S.C. 106(g), 40113, 44701. \n\n\n\nSec. 39.13 (Amended) \n\n0 2. The FAA amends Sec. 39.13 by 0 a. Removing Airworthiness Directive (AD) 2013-07-09, Amendment 39-17413 (78 FR 22178, April 15, 2013); and 0 b. Adding the following new AD: \n\n2021-08-04 The Boeing Company: Amendment 39-21498; Docket No. FAA- 2019-0480; Product Identifier 2019-NM-041-AD. \n\n(a) Effective Date \n\n\n\tThis airworthiness directive (AD) is effective May 26, 2021. \n\n(b) Affected ADs \n\n\n\tThis AD replaces AD 2013-07-09, Amendment 39-17413 (78 FR 22178, April 15, 2013) (AD 2013-07-09). \n\n(c) Applicability \n\n\n\tThis AD applies to all The Boeing Company airplanes, certificated in any category, as identified in paragraphs (c)(1) through (5) of this AD. \n\t(1) Model 737-200, -300, -400, -500, -600, -700, -700C, -800, - 900, and -900ER series airplanes. \n\t(2) Model 737-8 and 737-9 airplanes. \n\t(3) Model 747-200B, 747-200C, 747-200F, 747-400, 747-400D, and 747-400F series airplanes. \n\t(4) Model 757-200, -200PF, -200CB, and -300 series airplanes. \n\t(5) Model 767-200, -300, -300F, and -400ER series airplanes. \n\n(d) Subject \n\n\n\tAir Transport Association (ATA) of America Code 35, Oxygen. \n\n(e) Unsafe Condition \n\n\n\tThis AD was prompted by reports indicating that certain crew oxygen mask stowage box units were possibly delivered with a burr in the inlet fitting. The burr might break loose during test or operation, and might pose an ignition source or cause an inlet valve to jam. This AD was also prompted by a determination that the affected parts may be installed on airplanes outside the applicability of AD 2013-07-09. The FAA is issuing this AD to address this possible ignition source, which could result in an oxygen-fed fire; or an inlet valve jam in a crew oxygen mask stowage box unit, which could result in restricted flow of oxygen. \n\n(f) Compliance \n\n\n\tComply with this AD within the compliance times specified, unless already done. \n\n(g) Retained Inspection and Corrective Action, With No Changes \n\n\n\tThis paragraph restates the requirements of paragraph (g) of AD 2013-07-09 with no changes. For The Boeing Company Model 737 airplanes as identified in Boeing Alert \n\n((Page 20624)) \n\nService Bulletin 737-35A1121, Revision 1, dated November 7, 2011; The Boeing Company Model 747 airplanes as identified in Boeing Alert Service Bulletin 747-35A2126, Revision 1, dated September 29, 2011; and The Boeing Company Model 767 airplanes as identified in Boeing Alert Service Bulletin 767-35A0057, Revision 1, dated November 17, 2011: Within 24 months after May 20, 2013 (the effective date of AD 2013-07-09), do a general visual inspection to determine if the serial number of the crewoxygen mask stowage box unit is identified in the Appendix of Intertechnique Service Bulletin MXP1/4-35-175, Revision 2, dated May 10, 2011, in accordance with the Accomplishment Instructions of Boeing Alert Service Bulletin 737- 35A1121, Revision 1, dated November 7, 2011; Boeing Alert Service Bulletin 747-35A2126, Revision 1, dated September 29, 2011; or Boeing Alert Service Bulletin 767-35A0057, Revision 1, dated November 17, 2011; as applicable. A review of airplane maintenance records is acceptable in lieu of this inspection if the serial number of the crew oxygen mask stowage box unit can be conclusively determined from that review. \n\t(1) If any crew oxygen mask stowage box unit has a serial number identified in table 1 of the Appendix of Intertechnique Service Bulletin MXP1/4-35-175, Revision 2, dated May 10, 2011: Before further flight, replace the crew oxygen mask stowage box unit with a new or serviceable unit in accordance with the Accomplishment Instructions of Boeing Alert Service Bulletin 737-35A1121, Revision 1, dated November 7, 2011; Boeing Alert Service Bulletin 747- 35A2126, Revision 1, dated September 29, 2011; or Boeing Alert Service Bulletin 767-35A0057, Revision 1, dated November 17, 2011; as applicable. \n\t(2) If any crew oxygen mask stowage box unit has a serial number identified in table 2 of the Appendix of Intertechnique Service Bulletin MXP1/4-35-175, Revision 2, dated May 10, 2011: Before further flight, add the letter ''I'' to the end of the serial number (identified as ''SER'') on the identification label, in accordance with the Accomplishment Instructions of Intertechnique Service Bulletin MXP1/4-35-175, Revision 2, dated May 10, 2011; and reinstall in accordance with the Accomplishment Instructions of Boeing Alert Service Bulletin 737-35A1121, Revision 1, dated November 7, 2011; Boeing Alert Service Bulletin 747-35A2126, Revision 1, dated September 29, 2011; or Boeing Alert Service Bulletin 767-35A0057, Revision 1, dated November17, 2011; as applicable. \n\t(3) If no crew oxygen mask stowage box unit has a serial number identified in the Appendix of Intertechnique Service Bulletin MXP1/ 4-35-175, Revision 2, dated May 10, 2011: Unless a records review was done to determine the serial number, before further flight, reinstall the crew oxygen mask stowage box unit, in accordance with the Accomplishment Instructions of Boeing Alert Service Bulletin 737-35A1121, Revision 1, dated November 7, 2011; Boeing Alert Service Bulletin 747-35A2126, Revision 1, dated September 29, 2011; or Boeing Alert Service Bulletin 767-35A0057, Revision 1, dated November 17, 2011; as applicable. \n\n(h) Retained Parts Installation Prohibition, With No Changes \n\n\n\tThis paragraph restates the requirements of paragraph (h) of AD 2013-07-09 with no changes. For airplanes identified in paragraph (g) of this AD: As of May 20, 2013 (the effective date of AD 2013- 07-09), no person may install a crew oxygen mask stowage box unit with a serialnumber listed in the Appendix of Intertechnique Service Bulletin MXP1/4-35-175, Revision 2, dated May 10, 2011, on any airplane. \n\n(i) New Inspection and Corrective Action \n\n\n\tFor airplanes other than those identified in paragraph (g) of this AD: Within 24 months after the effective date of this AD, do a general visual inspection to determine if the serial number of the crew oxygen mask stowage box unit is identified in the Appendix of Intertechnique Service Bulletin MXP1/4-35-175, Revision 2, dated May 10, 2011. A review of airplane maintenance records is acceptable in lieu of this inspection if the serial number of the crew oxygen mask stowage box unit can be conclusively determined from that review, or if it can be conclusively determined that the serial number is not one that is identified in the Appendix of Intertechnique Service Bulletin MXP1/4-35-175, Revision 2, dated May 10, 2011. \n\t(1) If any crew oxygen mask stowage box unit has a serial number identified in table 1 ofthe Appendix of Intertechnique Service Bulletin MXP1/4-35-175, Revision 2, dated May 10, 2011, or the crew oxygen mask stowage box unit has a serial number that is unreadable or undetermined: Before further flight, replace the crew oxygen mask stowage box unit with a new or serviceable unit. If any crew oxygen mask stowage box unit's serial number is unreadable or undetermined, but the manufacturing date can conclusively be determined to be outside the range of July 2007 through November 2007 inclusive, the crew oxygen mask stowage box unit does not need to be replaced. \n\t(2) If any crew oxygen mask stowage box unit has a serial number identified in table 2 of the Appendix of Intertechnique Service Bulletin MXP1/4-35-175, Revision 2, dated May 10, 2011: Before further flight, add the letter ''I'' to the end of the serial number (identified as ''SER'') on the identification label, in accordance with the Accomplishment Instructions of Intertechnique Service Bulletin MXP1/4-35-175, Revision 2, dated May 10, 2011; and reinstall the crew oxygen mask stowage box unit. \n\n(j) New Parts Installation Prohibition \n\n\n\t(1) For airplanes other than those identified in paragraph (g) of this AD: As of the effective date of this AD, no person may install a crew oxygen mask stowage box unit with a serial number identified in table 1 of the Appendix of Intertechnique Service Bulletin MXP1/4-35-175, Revision 2, dated May 10, 2011; or any crew oxygen mask stowage box unit with a serial number that is unreadable or undetermined unless the manufacturing date can conclusively be determined by a review of the airplane maintenance records to be outside the range of July 2007 through November 2007 inclusive. \n\t(2) For airplanes other than those identified in paragraph (g) of this AD: As of the effective date of this AD, no person may install a crew oxygen mask stowage box unit with a serial number identified in table 2 of the Appendix of Intertechnique Service Bulletin MXP1/4-35-175,Revision 2, dated May 10, 2011, on any airplane, unless that crew oxygen mask stowage box unit has been modified as required by paragraph (i)(2) of this AD. \n\n(k) Alternative Methods of Compliance (AMOCs) \n\n\n\t(1) The Manager, Seattle ACO Branch, FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. In accordance with 14 CFR 39.19, send your request to your principal inspector or local Flight Standards Office, as appropriate. If sending information directly to the manager of the certification office, send it to the attention of the person identified in paragraph (l) of this AD. Information may be emailed to: [email protected]. \n\t(2) Before using any approved AMOC, notify your appropriate principal inspector, or lacking a principal inspector, the manager of the responsible Flight Standards Office. \n\t(3) An AMOC that provides an acceptable level of safety may be used for any repair, modification, or alteration required by this AD if it is approved by the Boeing Company Organization Designation Authorization (ODA) that has been authorized by the Manager, Seattle ACO Branch, FAA, to make those findings. To be approved, the repair method, modification deviation, or alteration deviation must meet the certification basis of the airplane, and the approval must specifically refer to this AD. \n\t(4) AMOCs approved previously for AD 2013-07-09 are approved as AMOCs for the corresponding provisions of this AD. \n\n(l) Related Information \n\n\n\tFor more information about this AD, contact Nicole Tsang, Aerospace Engineer, Cabin Safety and Environmental Systems Section, FAA, Seattle ACO Branch, 2200 South 216th St., Des Moines, WA 98198; phone and fax: 206-231-3959; email: [email protected]. \n\n(m) Material Incorporated by Reference \n\n\n\t(1) The Director of the Federal Register approved the incorporation by reference (IBR) of the service information listed in this paragraph under 5 U.S.C.552(a) and 1 CFR part 51. \n\t(2) You must use this service information as applicable to do the actions required by this AD, unless this AD specifies otherwise. \n\t(3) The following service information was approved for IBR on May 20, 2013 (78 FR 22178, April 15, 2013). \n\t(i) Boeing Alert Service Bulletin 737-35A1121, Revision 1, dated November 7, 2011. \n\t(ii) Boeing Alert Service Bulletin 747-35A2126, Revision 1, dated September 29, 2011. \n\n((Page 20625)) \n\n\n\t(iii) Boeing Alert Service Bulletin 767-35A0057, Revision 1, dated November 17, 2011. \n\t(iv) Intertechnique Service Bulletin MXP1/4-35-175, Revision 2, dated May 10, 2011. \n\t(4) For Boeing service information identified in this AD, contact Boeing Commercial Airplanes, Attention: Contractual & Data Services (C&DS), 2600 Westminster Blvd., MC 110-SK57, Seal Beach, CA 90740-5600; telephone 562-797-1717; internet https://www.myboeingfleet.com. \n\t(5) For Intertechnique service information identified in this AD, contact Aerotechnics, 61 rue Pierre Curie BP 1, 78373 Plaisir, CEDEX, France; phone: +33 1 6486 6964; internet https://www.zodiacaerospace.com. \n\t(6) You may view this service information at the FAA, Airworthiness Products Section, Operational Safety Branch, 2200 South 216th St., Des Moines, WA. For information on the availability of this material at the FAA, call 206-231-3195. \n\t(7) You may view this 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, email [email protected], or go to: https://www.archives.gov/federal-register/cfr/ibr-locations.html. \n\n\n\tIssued on March 30, 2021. Ross Landes, Deputy Director for Regulatory Operations, Compliance & Airworthiness Division, Aircraft Certification Service. (FR Doc. 2021-08213 Filed 4-20-21; 8:45 am) BILLING CODE 4910-13-P