What was found
APU BLD AIR DUCT PRESS LO APPROX 18 PSI FOR LT ENGINE START. PROBLEM RELATED TO LOW PNEUMATIC DUCT PRESSURE. NR 1 ENGINE PRSOV WOULD NOT CLOSE. REPLACED PRSOV AND APU PNEUMATICS OP CHECK OK.
- Difficulty date
- January 6, 2010
- Submitted
- February 1, 2010
- Operation
- Air carrier
- Aircraft
- N596UA
- Make and model
- Boeing 757222
- Aircraft serial
- 28749
- Aircraft time
- 47,091 hours, 13,126 cycles
- Engine
- Pwa PW2037
- System (JASC)
- 4950 · APU Bleed Air System
- Part
- Shutoff Valve
- Part number
- 32144882
- Part serial
- 27
- Condition
- Failed
- 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.