What was found
APU DID NOT START AT ALTITUDE, START OK ON GND. COMPLETED FIM 49-43 TASK 805 STEPS C 5 - C 7 D 1 & 2. ACTION PRECAUTION CHANGED PRSOV, PRESS CONTROLLER & PRESS SENSOR. NO ACTIVE OR LATCHED MSGS.
- Difficulty date
- January 29, 2015
- Submitted
- January 30, 2015
- Operation
- Air carrier
- Aircraft
- N221UA
- Make and model
- Boeing 777222
- Aircraft serial
- 30552
- Aircraft time
- 57,453 hours, 7,014 cycles
- Engine
- Pwa PW40903
- System (JASC)
- 4940 · APU Start/Ignition System
- Part
- Unknown
- Condition
- Malfunctioned
- Location
- Apu
- Stage of operation
- CR
- 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.