What was found
FUEL LEAKING FROM NR 1 MAIN FUEL TANK FILL VALVE CONTROL UNIT. PCN 685-5121 REFUEL VALVE CONTROL UNIT. REPLACED O-RINGS, NO LEAKS.
- Difficulty date
- November 19, 2012
- Submitted
- December 13, 2012
- Operation
- Air carrier
- Aircraft
- N174UA
- Make and model
- Boeing 747422
- Aircraft serial
- 24381
- Aircraft time
- 89,017 hours, 9,927 cycles
- Engine
- Pwa PW4056
- System (JASC)
- 2820 · Aircraft Fuel Distribution System
- Part
- O-Ring
- Condition
- Leaking
- Location
- Fuel System
- Stage of operation
- IN
- How discovered
- O
- Nature of condition
- K
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.