What was found
APU FAULT DURING START. TRIED 3 TIMES. ECU SHOWS ONLY "START ABORTED" WITH NO UNIT FAILURES. LIKELY A PROBLEM WITH THE BATTERY OR BATTERY CHARGER. 2 OTHER APU STARTS AT GATE WERE NORMAL.
- Difficulty date
- June 26, 2011
- Submitted
- July 22, 2011
- Operation
- Air carrier
- Aircraft
- N539UA
- Make and model
- Boeing 757222
- Aircraft serial
- 25223
- Aircraft time
- 66,008 hours, 24,267 cycles
- Engine
- Pwa PW2037
- System (JASC)
- 4920 · APU Core Engine
- Part
- Unknown
- Condition
- Malfunctioned
- Location
- Apu
- Stage of operation
- IN
- How discovered
- V
- Nature of condition
- O
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.