# SDR UALA2011121506883

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 15, 2011
- Submitted: December 16, 2011
- Operation: Air carrier
- Aircraft: [N665UA](https://openairdocs.org/aircraft/N665UA), registered now
- Make and model: Boeing 767322
- Aircraft serial: 29237
- Aircraft time: 48,255 hours, 13,042 cycles
- Engine: Pwa PW4056
- System (JASC): [4940 · APU Start/Ignition System](https://openairdocs.org/jasc/4940)
- Part: Relay
- Part number: A703CD
- Part serial: 21
- Condition: Faulty
- Location: Apu
- Stage of operation: NR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2011121506883

## Discrepancy

APU WILL NOT START.  HANGS BETWEEN 0-10% RPM.  SHUTSDOWN WITH APU FAULT LIGHT ON.  REFER TO MM-49-61-00, CODE B1.  NO POWER BEYOND MAIN CONTACTOR, NO POWER TO CONTROL SIDE OF CONTACTOR.  REPLACED RELAYS K117 & K197, AND APU CONTROLLER.  APU START OKAY.

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