# SDR UALA2010021500580

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 14, 2010
- Submitted: February 16, 2010
- Operation: Air carrier
- Aircraft: [N209UA](https://openairdocs.org/aircraft/N209UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 30215
- Aircraft time: 42,765 hours, 5,557 cycles
- Engine: Pwa PW4090
- System (JASC): [4900 · Airborne Auxiliary Power Unit (APU) System](https://openairdocs.org/jasc/4900)
- Part: Controller
- Part number: S351W200100
- Part serial: 30
- Condition: Faulty
- Location: Apu
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2010021500580

## Discrepancy

ON PREFLIGHT CHECK FOUND APU CONTROLLER FAULT.  REPLACED APU CONTROLLER, ACP OP CHKS, NO DEFECTS. STATUS MSG CLEARED.

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