Airworthiness directives › 2018-26-05
AD 2018-26-05 Airworthiness Directives; The Boeing Company Airplanes
Models named: 777-200, 777-200LR, 777-300, 777-300ER, 777F series. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to The Boeing Company Model 777-200, 777-200LR, 777-300, 777-300ER, and 777F series airplanes, certificated in any category, excluding line numbers 1165 and subsequent.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
Within 24 months after the effective date of this AD: Do an inspection to determine the part numbers (P/Ns) of the motor-operated valve (MOV) actuators at the fuel shutoff spar valve positions for the left and right engines, in accordance with the Accomplishment Instructions of Boeing Service Bulletin 777-28A0034, Revision 3, dated September 25, 2015. A review of airplane maintenance records is acceptable in lieu of this inspection if the part numbers can be conclusively determined from that review. If it can be definitively determined, by visual inspection or airplane maintenance records review, that P/N MA30A1017 (Boeing P/N S343T003-76) is installed, or that airplane information management system (AIMS) 2 Block Point (BP) Version 17 or later software is installed, no further action is required by paragraph (g) of this AD. (1) For any MOV actuator with a P/N other than P/N MA30A1017 (Boeing P/N S343T003-76) on an airplane having AIMS-1 installed: Within 24 months after the effective date of this AD, install MOV actuators having part number (P/N) MA30A1017 at the engine fuel shutoff spar positions, in accordance with the Accomplishment Instructions of Boeing Service Bulletin 777-28A0034, Revision 3, dated September 25, 2015. (2) For any MOV actuator with a P/N other than P/N MA30A1017 (Boeing P/N S343T003-76) on an airplane having AIMS-2 BP Version 16 software or earlier version, installed: Within 24 months after the effective date of this AD, do the actions specified in paragraph (g)(2)(i) or (g)(2)(ii) of this AD. For purposes of this AD, airplanes identified as Group 4 in Boeing Service Bulletin 777-28A0034, Revision 3, dated September 25, 2015, also include airplanes with AIMS-2 BP Version 16 or earlier software installed. (i) Install MOV actuators having P/N MA30A1017 at the engine fuel shutoff spar valve positions, in accordance with the Accomplishment Instructions of Boeing Service Bulletin 777-28A0034, Revision 3, dated September 25, 2015. For airplanes identified as Group 7 in Boeing Service Bulletin 777-28A0034, Revision 3, dated September 25, 2015, with AIMS-2 BP Version 16 or earlier software, the instructions for installing P/N MA30A1017 (Boeing P/N S343T003-76) are in Figures 35 and 37 of Boeing Service Bulletin 777-28A0034, Revision 3, dated September 25, 2015. (ii) Install AIMS-2 BP Version 17A software or later-approved version, in accordance with the Accomplishment Instructions of Boeing Service Bulletin 777-31-0218, dated September 8, 2016. Later-approved versions of the software are only those Boeing software versions that are approved as a replacement for AIMS-2 BP Version 17A software, and approved as part of the type design by the FAA after issuance of Boeing Service Bulletin 777-31-0218, dated September 8, 2016.
Unsafe condition
This AD was prompted by reports of latently failed engine fuel shutoff spar valves discovered during fuel filter replacement. We are issuing this AD to address latent failure of the fuel shutoff spar valve to the engine, which could result in the inability to terminate fuel flow to the engine and, in the case of an engine fire, could lead to wing failure.
Affected ADs
This AD affects AD 2015-19-01, Amendment 39-18264 (80 FR 55521, September 16, 2015) (“AD 2015-19-01”).
Read the original on the Federal Register →
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The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1