SDR UIEA2021012200101

Service difficulty report · Gcu · Boeing 767383

Difficulty date: January 22, 2021
Submitted: January 25, 2021
Operation: Air carrier
Aircraft: N1511A
Make and model: Boeing 767383
Aircraft serial: 24318
Aircraft time: 102,379 hours, 17,031 cycles
System (JASC): 2421 · AC Generator-Alternator
Part: Gcu
Part number: 734284F
Part serial: 2827
Condition: Faulted
Location: Left
Stage of operation: IN
How discovered: 9
Nature of condition: J
Precautionary procedure: K

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

What was found

BPCU INDICATES "L GCU FAIL" (CODE 340. "L FIELD OFF" LIGHT ILLUMINATED). REMOVED AND REPLACED L GCU, IAW B767 AMM 24-22-02. OPERATIONS CHECK GOOD, P/N 734284F S/N 1819. LEFT GEN POWER SYSTEM OK. TRANSFERRED TO MDDR 141274, IAW MEL 24-00-01-02 DUE 25 JAN 21. REMOVED/REPLACED LGCU, IAW B767 AMM 24-22-02. OPERATIONS CHECK GOOD. ENGINE RUN PERFORMED. BCPU LEFT GEN POWER SYSTEM OK. IDG RECONNECTED, OPERATIONS CHECK GOOD. LT GEN FIELD LIGHTS IS OUT. THIS CLEARS DMI 141274, PLACARD REMOVED.