What was found
C2 DEMAND PUMP SHOWS 600-1000 PSI WITH PUMP IN AUTO AT CRUISE. POSSIBLE AIR LEAK FROM MODULATING SHUTOFF VALVE TO ADP. WILL NEED VALVE & TUBES. REPLACED ADP MODULATING SHUTOFF VALVE. REPLACED TUBING. NEEDS INSTALLATION TEST.
- Difficulty date
- December 8, 2010
- Submitted
- December 10, 2010
- Operation
- Air carrier
- Aircraft
- N779UA
- Make and model
- Boeing 777222
- Aircraft serial
- 26941
- Aircraft time
- 58,969 hours, 10,675 cycles
- Engine
- Pwa PW4077
- System (JASC)
- 2913 · Hydraulic Pump (Electric/Engine), Main
- Part
- Shutoff Valve
- Part number
- 32153947
- Part serial
- 197C
- Condition
- Faulty
- Location
- Hyd Pump
- Stage of operation
- NR
- How discovered
- 9
- Nature of condition
- J
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.