# SDR CALA2013100991893

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 8, 2013
- Submitted: October 10, 2013
- Operation: Air carrier
- Aircraft: N551UA
- Make and model: Boeing 757222
- Aircraft serial: 25399
- Aircraft time: 82,468 hours, 23,837 cycles
- Engine: Pwa PW2037
- System (JASC): [4920 · APU Core Engine](https://openairdocs.org/jasc/4920)
- Part: Apu
- Condition: Malfunctioned
- Location: Apu Bay
- Stage of operation: IN
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2013100991893

## Discrepancy

APU WILL NOT START, HANGS AT 28%.  START ABORT MESSAGE.  REPLACED APU.

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