What was found
APU NOT PUTTING OUT AIR PRESSURE. APU AIR PRESSURE NORMAL, NO PACKS ON 32 PSI, 2 PACKS ON 28 PSI, MOTOR 1 ENG, DIPS TO 25 PSI RECOVERS TO 32 PSI. SUSPECT STICKING APU BLEED VALVE.
- Difficulty date
- May 24, 2012
- Submitted
- July 10, 2012
- Operation
- Air carrier
- Aircraft
- N543UA
- Make and model
- Boeing 757222
- Aircraft serial
- 25698
- Aircraft time
- 78,911 hours, 22,956 cycles
- Engine
- Pwa PW2037
- System (JASC)
- 4950 · APU Bleed Air System
- Part
- Bleed Valve
- Part number
- 2790598103
- Part serial
- 1003
- Condition
- Sticking
- Location
- Apu
- Stage of operation
- IN
- How discovered
- 9
- Nature of condition
- O
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.