Airworthiness Directive · Amendment 39-19535 · Fuel
The Boeing Company Airplanes
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.
We are adopting a new airworthiness directive (AD) for certain The Boeing Company Model 777 airplanes. This AD was prompted by reports of latently failed engine fuel shutoff spar valves discovered during fuel filter replacement. This AD requires inspecting to determine the part numbers (P/Ns) of the motor-operated valve (MOV) actuators at the engine fuel shutoff spar valve positions, installing MOV actuators having a certain acceptable part number or software if necessary, and revising the maintenance or inspection program to add a new airworthiness limitation. We are issuing this AD to address the unsafe condition on these products.
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.
Within 24 months after the effective date of this AD, revise the maintenance or inspection program, as applicable, to add Airworthiness Limitation (AWL) 28-AWL-MOVA by incorporating the information specified in figure 1 to paragraph (h) of this AD into the Airworthiness Limitations Section of the Instructions for Continued Airworthiness.
Accomplishment of the actions required by paragraphs (g) and (h) of this AD on all affected airplanes in an operator's fleet terminates all requirements of AD 2015-19-01.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
