What was found
APU WILL NOT START. ECU BITE SHOWED SLOW START WITH STARTER CIRCUIT. T/S IAW MM AND FOUND STARTER MOTOR WITH EVIDENCE OF INTERNAL SHORTING. STARTER MOTOR BURNED. REPLACED STARTER. REPLACED APU CRANK CONTACTOR. APU WORKS NORMAL.
- Difficulty date
- January 16, 2010
- Submitted
- January 22, 2010
- Operation
- Air carrier
- Aircraft
- N597UA
- Make and model
- Boeing 757222
- Aircraft serial
- 28750
- Aircraft time
- 43,308 hours, 12,093 cycles
- Engine
- Pwa PW2037
- System (JASC)
- 4940 · APU Start/Ignition System
- Part
- Motor
- Part number
- 5198587
- Part serial
- 194164
- Condition
- Faulty
- Location
- Apu Starter
- Stage of operation
- NR
- How discovered
- 9
- Nature of condition
- O
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.