What was found
INSUFFICIENT APU BLEED PRESSURE TO START ENGINES ONLY 15 PSI. REPLACED APU SHUTOFF VALVE (PN 2790598-101 - SN 146), NO HELP. REPLACED FLOW SENSING MODULE, NO HELP. REPLACED APU SURGE VALVE. APU BLEED PRESSURE NORMAL.
- Difficulty date
- September 1, 2010
- Submitted
- September 13, 2010
- Operation
- Air carrier
- Aircraft
- N544UA
- Make and model
- Boeing 757222
- Aircraft serial
- 25322
- Aircraft time
- 70,917 hours, 20,394 cycles
- Engine
- Pwa PW2037
- System (JASC)
- 4950 · APU Bleed Air System
- Part
- Valve
- Part number
- 97980612
- Part serial
- 256
- Condition
- Faulty
- Location
- Apu
- Stage of operation
- TX
- How discovered
- O
- Nature of condition
- J
- Precautionary procedure
- D
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.