# SDR UALA2010080202780

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 1, 2010
- Submitted: August 2, 2010
- Operation: Air carrier
- Aircraft: N543UA
- Make and model: Boeing 757222
- Aircraft serial: 25698
- Aircraft time: 71,845 hours, 20,848 cycles
- Engine: Pwa PW2037
- System (JASC): [4940 · APU Start/Ignition System](https://openairdocs.org/jasc/4940)
- Part: Exciter
- Part number: 106170756
- Part serial: 138
- Condition: Faulty
- Location: Apu
- Stage of operation: TX
- 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/UALA2010080202780

## Discrepancy

APU FAULT ON START DURING TAXI IN.  APU BITE INDICATES FAULTY IGNITION UNIT.  NO TIME TO FURTHER TROUBLESHOOT.  REPLACED IGNITER, CABLE AND BOX PER MM'S, OPS OKAY.

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