# SDR UALA2012073004113

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 28, 2012
- Submitted: August 28, 2012
- Operation: Air carrier
- Aircraft: [N171UA](https://openairdocs.org/aircraft/N171UA), registered now
- Make and model: Boeing 747422
- Aircraft serial: 24322
- Aircraft time: 86,459 hours, 10,246 cycles
- Engine: Pwa PW4056
- System (JASC): [5247 · Auxiliary Power Unit (APU) Doors](https://openairdocs.org/jasc/5247)
- Part: Actuator
- Part number: DL2033M42
- Part serial: 120
- Condition: Failed
- Location: Apu Doors
- Stage of operation: TX
- How discovered: O
- Nature of condition: J
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2012073004113

## Discrepancy

ON PUSHBACK, APU INLET DOOR ADVISORY AND STATUS MESSAGE.  FOUND APU DOOR IS PARTIALLY OPENED.  INSTALLED NEW ACTUATOR.

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