What was found
'LAV-GALLEY FANS' EICAS STATUS MESSAGE DISPLAYED. BOTH LAV-GALLEY VENT FANS FAILED OR INTERFACE FAIL. FOUND BTB NR3 TRIPPED. REPLACED GCU. GCU GND TEST. NO MSG FOUND.
- Difficulty date
- December 22, 2009
- Submitted
- December 31, 2009
- Operation
- Air carrier
- Aircraft
- N118UA
- Make and model
- Boeing 747422
- Aircraft serial
- 28811
- Aircraft time
- 43,706 hours, 5,359 cycles
- Engine
- Pwa PW4056
- System (JASC)
- 2421 · AC Generator-Alternator
- Part
- Gcu
- Part number
- 60B401621
- Part serial
- 127
- Condition
- Malfunctioned
- Stage of operation
- NR
- How discovered
- O
- Nature of condition
- J
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.