What was found
APU AUTO SHUTDOWN AFTER ENGINE START. REPLACED APU CHECK VALUE DIFFERENTIAL PRESSURE SENSOR & SURGE CONTROL VALVE IAW AMM, OPERATIONS CHECKED NORMAL. RAN BOTH ENGINES, APU OPERATIONS NORMAL.
- Difficulty date
- October 6, 2013
- Submitted
- October 8, 2013
- Operation
- Air carrier
- Aircraft
- N786UA
- Make and model
- Boeing 777222
- Aircraft serial
- 26938
- Aircraft time
- 72,008 hours, 10,264 cycles
- Engine
- Pwa PW40903
- System (JASC)
- 4950 · APU Bleed Air System
- Part
- Pressure Sensor
- Condition
- Faulty
- Location
- Apu
- Stage of operation
- TX
- How discovered
- O
- Nature of condition
- O
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.