Service difficulty report · Gcu · Boeing 777222

Difficulty date
June 5, 2011
Submitted
June 8, 2011
Operation
Air carrier
Aircraft
N218UA
Make and model
Boeing 777222
Aircraft serial
30222
Aircraft time
43,155 hours, 5,263 cycles
Engine
Pwa PW40903
Part
Gcu
Part number
756603E
Part serial
82
Condition
Faulty
Location
Nr 1
Stage of operation
NR
How discovered
O
Nature of condition
O
Precautionary procedure
O

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

What was found

ELEC GEN SYS L FAULTS. DUE TO RECENT HISTORY OF ELEC GEN SYS L FAULT, ACP FIM TASK 24-23-837. ACCOMPLISH FIM TASK INCLUDING WIRING CKS. INCLUDE OHMS AND CONTINUITY READINGS IN SIGNOFF. IF NO FAULTS ARE FOUND REPLACE THE RIGHT GCB (566-0549) PER AMM THE LEFT GCU (566-9007) PER AMM. ACCOMPLISHED FIM 24-23 TASK 837. REF WDM 24-28-11. CHECKED WIRE FROM CON D20021P PIN 7 TO E1 L GEN CONTROL UNIT PLUG. CONTINUITY WAS 1 OHM AND NO SHORTS TO GROUND. REPLACED RT GCB AND L GCU.