What was found
AFTER LT ENGINE START, APU PRESSURE DROPPED TO ZERO. REPLACED APU CHECK VALVE IAW MM 49-11-00. LEAK CHECKED, RAN ENGINES TWICE AT 5 MINUTE IDLE RUN VERIFIED NO EICAS MSGS, ALL INDICATIONS NORMAL.
- Difficulty date
- July 29, 2013
- Submitted
- July 29, 2013
- Operation
- Air carrier
- Aircraft
- N550UA
- Make and model
- Boeing 757222
- Aircraft serial
- 25398
- Aircraft time
- 23,585 hours, 23,585 cycles
- Engine
- Pwa PW2037
- System (JASC)
- 3610 · Pneumatic Distribution System
- Part
- Bleed Air Sys
- Condition
- Malfunctioned
- Location
- Apu
- Stage of operation
- NR
- How discovered
- O
- Nature of condition
- J
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.