B767-300 and 300 ER
Maintenance Airframe; Maintenance Powerplant
Aircraft Equipment Problem Critical; Deviation / Discrepancy - Procedural FAR; Deviation / Discrepancy - Procedural Maintenance; Deviation / Discrepancy - Procedural Published Material / Policy
General Maintenance Action
Manuals; Procedure
Maintenance actions performed after discovery of cause of #2 engine in flight shutdown. After troubleshooting the inflight shutdown cause to the #2 engine Main Equipment Center discharge to fuel flow transmitter line; which found loose hardware on the Main Equipment Center side connection resulting in a gasket failure; I removed the entire line in order to facilitate the gasket replacement. I had researched the hardware located on the Main Equipment Center side of the line in order to determine if the hardware was a contributing factor to the failure. I had also utilized two Aircraft Maintenance Manual references in order to remove and install the named tube; one for Main Equipment Center replacement (Aircraft Maintenance Manual 73-XX-XX) and one for fuel flow transmitter (Aircraft Maintenance Manual 73-XX-XX). While the fuel flow transmitter Aircraft Maintenance Manual reference does state a removal step from the Main Equipment Center for the gasket; I wanted to ensure I had the proper reference. I believe I had misinterpreted the detail pertaining to the attaching hardware for both ends of the tube in both Aircraft Maintenance Manual references and the IPC reference describing bolt length and washer use as determined by the service bulletins mentioned in both Aircraft Maintenance Manual references; and subsequently installed hardware in the opposing end of the tube; resulting in washers being where they should not be.Suggestions on how to correct the reported concern? Two person verification of components being installed that have service bulletin changes affecting them. Communication between peers and peer-to-leadership when encountering potentially confusing instructions within technical documents in order to determine difficulties that may arise and address solutions before actions are taken on-wing.
Technician reported misinterpreting the manuals and reinstalled the hardware attaching a fuel line incorrectly.