Service difficulty report · Gcu · Boeing 767322

Difficulty date
January 5, 2012
Submitted
January 26, 2012
Operation
Air carrier
Aircraft
N655UA
Make and model
Boeing 767322
Aircraft serial
25393
Aircraft time
81,574 hours, 13,125 cycles
Engine
Pwa PW4060
Part
Gcu
Part number
M734284AF
Part serial
271
Condition
Faulted
Location
Lt Generator
Stage of operation
CR
How discovered
O
Nature of condition
H, J
Precautionary procedure
A

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

LT GENERATOR FAULT, FLIGHT DIVERTED. CARRIED OUT BPCU BITE CHECK. FOUND LEFT GENERATION SYSTEM FAULTS. REPLACED LT GCU AND IDG REF MM. FURTHER T- S REQUIRED DUE FAULTS STILL EXISTING. ITEM TRANSFERRED TO SMC6 AS FAULT NOW WITH DAMAGED C901 CONTACTOR IN P31 PWR PANEL. CONTACTOR C901 RMV'D FOR REPLACEMENT DUE TO DAMAGE. MR24229 REQUIRED. C901 HAS BEEN TEMPORARILY INSTALLED TO ALLOW FOR 18 GAUGE WIRING REPAIR. ALL WIRES EXCEPT FOR T3 HAVE BEEN FITTED TEMPORARILY IN POSITION, WASHERS AND NUTS FITTED LOOSELY. TAG AND LUG COVERS ARE IN AIRCRAFT FWD MIRRORED COUNTER. WILL REQUIRE CORRECT INSTALLATION PER MM BEFORE PWR IS RESTORED TO AIRCRAFT. CONFIRMED CORRECT INSTALLATION OF WIRING RO CONTACTOR C901, APPLIED ACFT POWER ALL SATISFACTORY.