Service difficulty report · Control Module · Boeing 767322

Difficulty date
September 25, 2025
Submitted
September 29, 2025
Operation
Air carrier
Aircraft
N649UA
Make and model
Boeing 767322
Aircraft serial
25286
Aircraft time
130,359 hours, 19,987 cycles
Part
Control Module
Part number
3B391C
Part serial
N4582
Condition
Faulted
Location
Zone 100
Part time
28,552 hours, 4,093 cycles
Stage of operation
CL
How discovered
O
Nature of condition
B
Precautionary procedure
A

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

What was found

AFTER TO ALL FWD GALLEY OVENS AND CHILLERS INOP. AFT R COFFEPOT INOP OPERATED GALLEY OVENS/CHILLERS FOR APPROX 25 MIN AT HIGH PWR UNABLE TO DUP. PLEASE CHECK KVA SETTING OF FWD ELCU PER NAT DRAWING N0542-D73 WD 25-31-11, PINS 11 & 14 ARE JUMPERED. IF NO DEFECT CONT.. INSPECT GALLEY DISC D9066 FOR SECURITY AND INSPECT PINS FOR DAMAGE. ALSO INSPECT D378 OF FWD ELCU M225 AND MAIN FEEDER CABLES A1,A2,B1,B2,C1,C2, IF NO FAULTS REPLACE THE FWD ELCU M225 AND BPCU AS A PRECAUTION VERIFIED CORRECT KVA SETTING WITH PINS 11 AND 14 JUMPER OF D378, CONTINUITY CHECKED GOOD. REF NAT DRAWING N0542-D73. PERFORMED GVI OF D378 AND FEEDER CABLES A1,A2,B1,B2,C1,C2 AT M225 ELCU, NO ISSUES FOUND. REF AMM 25-31-03-404-009, NAT DRAWING N0542-D73. R & R BPCU REF AMM 24-41-03-404-008, OPS CHECKED OK. R & R ELC REF AMM 25-31-03-404-009 , OPS CHECKED OK. DURING ENGINE RUNS VERIFIED GALLEY POWER DID NOT SHED POWER WITH LOAD SUPPLIED. GALLEY POWER CHECKED GOOD.