2019-08-09: Nacelles/ pylons

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\nSec. 39.13 (Amended) \n\n0 2. The FAA amends Sec. 39.13 by adding the following new airworthiness directive (AD): \n\n2019-08-09 The Boeing Company: Amendment 39-19630; Docket No. FAA- 2018-0703; Product Identifier 2018-NM-007-AD. \n\n(a) Effective Date \n\n\n\tThis AD is effective June 13, 2019. \n\n(b) Affected ADs \n\n\n\tThis AD affects AD 2017-04-13, Amendment 39-18808 (82 FR 11795, February 27, 2017) (''AD 2017-04-13''). \n\n(c) Applicability \n\n\n\tThis AD applies to all The Boeing Company Model 747-8 and 747-8F series airplanes, certificated in any category. \n\n(d) Subject \n\n\n\tAir Transport Association (ATA) of America Code 54, Nacelles/ pylons. \n\n(e) Unsafe Condition \n\n\n\tThis AD was prompted by reports of damaged vapor seals, block seals, and heat shield seals on the outboard pylons between the engine strut and aft fairing. We are issuing this AD to address heat damage to the vapor seals between the engine strut and aft fairing. Such damage could allow flammable fluid leakage out of the aft fairing, which could result in an uncontrolled fire in the engine strut. \n\n((Page 20245)) \n\n(f) Compliance \n\n\n\tComply with this AD within the compliance times specified, unless already done. \n\n(g) Required Actions \n\n\n\t(1) For airplanes identified in Boeing Alert Service Bulletin 747-54A2247, dated August 3, 2017: Except as required by paragraph (h) of this AD, at the applicable times specified in paragraph 1.E., ''Compliance,'' of Boeing Alert Service Bulletin 747-54A2247, dated August 3, 2017, do all applicable actions identified as ''RC'' (required for compliance) in, and in accordance with, the Accomplishment Instructions of Boeing Alert Service Bulletin 747- 54A2247, dated August 3, 2017. \n\t(2) For airplanes not identified in Boeing Alert Service Bulletin 747-54A2247, dated August 3, 2017: Within 4 years or 4,800 flight cycles after the effective date of this AD, whichever occurs first, inspect to determine if any part number identified in paragraphs (g)(2)(i) through (g)(2)(v) of this AD is installed. If any part number specified in paragraphs (g)(2)(i) through (g)(2)(v) of this AD is installed, within 4 years or 4,800 flight cycles after the effective date of this AD, whichever occurs first, replace the part with a part number that is identified as an acceptable replacement in Boeing Alert Service Bulletin 747-54A2247, dated August 3, 2017. A review of airplane maintenance records is acceptable in lieu of this inspection if the part numbers specified in paragraphs (g)(2)(i) through (g)(2)(v) of this AD can be conclusively determined from that review. \n\t(i) An access panel lateral restraint with part number (P/N) 321U8595-1, 321U8595-2, 321U8595-3, or 321U8595-4. \n\t(ii) A block seal with P/N 323U8452-2. \n\t(iii) A vapor seal with P/N 323U8452-3. \n\t(iv) A heatshield seal with P/N 323U8852-1. \n\t(v) A heatshield seal retainer P/N 323U8852-2. \n\n(h) Exceptions to Service Information Specifications \n\n\n\tFor purposes of determining compliance with the requirements of this AD: Where Boeing Alert Service Bulletin 747-54A2247, dated August 3, 2017, uses the phrase ''the original issue date of this service bulletin,'' this AD requires using ''the effective date of this AD.'' \n\n(i) Terminating Action for Repetitive Inspections \n\n\n\tAccomplishing the actions specified in paragraphs (g)(1) or (g)(2) of this AD, as applicable, terminates all requirements of AD 2017-04-13. \n\n(j) Parts Installation Prohibition/Limitation \n\n\n\t(1) For airplanes identified in paragraph (g)(2) of this AD on which no part specified in paragraphs (g)(2)(i) through (g)(2)(v) of this AD is found installed: As of the determination that no part specified in paragraphs (g)(2)(i) through (g)(2)(v) of this AD is installed, comply with the prohibition and limitation specified in paragraphs (j)(1)(i) and (j)(1)(ii) of this AD. \n\t(i) Do not install an access panel lateral restraint with part numbers (P/Ns) 321U8595-1, 321U8595-2, 321U8595-3 and 321U8595-4; a block seal with P/N 323U8452-2; a heatshield seal with P/N 323U8852- 1; and a heatshield seal retainer P/N 323U8852-2; on any airplane. \n\t(ii) Do not install a vapor seal with P/N 323U8452-3, on any airplane, unless it is a new vapor seal that is installed as specified in the Accomplishment Instructions Boeing Alert Service Bulletin 747-54A2247, dated August 3, 2017. \n\t(2) For airplanes other than those identified in paragraph (j)(1) of this AD: After accomplishing the required actions specified in paragraph (g) of this AD, comply with the prohibition and limitation specified in paragraphs (j)(2)(i) and (j)(2)(ii) of this AD: \n\t(i) Do not install an access panel lateral restraint with P/Ns 321U8595-1, 321U8595-2, 321U8595-3, and 321U8595-4; a block seal with P/N 323U8452-2; a heatshield seal with P/N 323U8852-1; and a heatshield seal retainer P/N 323U8852-2; on any airplane. \n\t(ii) Do not install a vapor seal with P/N 323U8452-3, on any airplane, unless it is a new vapor seal that is installed as specified in the Accomplishment Instructions of Boeing Alert Service Bulletin 747-54A2247, dated August 3, 2017. \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 District 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 local flight standards district office/certificate holding district 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 Commercial Airplanes 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) Except as required by paragraph (h) of this AD: For service information that contains steps that are labeled as RC, the provisions of paragraphs (k)(4)(i) and (k)(4)(ii) of this AD apply. \n\t(i) The steps labeled as RC, including substeps under an RC step and any figures identified in an RC step, must be done to comply with the AD. If a step or substep is labeled ''RC Exempt,'' then the RC requirement is removed from that step or substep. An AMOC is required for any deviations to RC steps, including substeps and identified figures. \n\t(ii) Steps not labeled as RC may be deviated from using accepted methods in accordance with the operator's maintenance or inspection program without obtaining approval of an AMOC, provided the RC steps, including substeps and identified figures, can still be done as specified, and the airplane can be put back in an airworthy condition. \n\n(l) Related Information \n\n\n\tFor more information about this AD, contact Christopher Baker, Aerospace Engineer, Propulsion Section, FAA, Seattle ACO Branch, 2200 South 216th St., Des Moines, WA 98198; phone and fax: 206-231- 3552; email: [email protected]. \n\n\n\t(m) Material Incorporated by Reference \n\n\n\t(1) The Director of the FederalRegister 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 the AD specifies otherwise. \n\t(i) Boeing Alert Service Bulletin 747-54A2247, dated August 3, 2017. \n\t(ii) (Reserved) \n\t(3) For 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(4) You may view this service information at the FAA, Transport Standards 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(5) 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, call 202-741-6030, or go to: http://www.archives.gov/federal-register/cfr/ibr-locations.html.