# SDR CALA2014030390508

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 1, 2014
- Submitted: March 4, 2014
- Operation: Air carrier
- Aircraft: [N474UA](https://openairdocs.org/aircraft/N474UA), registered now
- Make and model: Airbus A320-232
- Registry model: [Airbus A320-232](https://openairdocs.org/model/airbus-a320-232) (OpenAirDocs)
- Aircraft serial: 1475
- Aircraft time: 42,391 hours, 18,238 cycles
- Engine: Iae V2527A5
- System (JASC): [4900 · Airborne Auxiliary Power Unit (APU) System](https://openairdocs.org/jasc/4900)
- Part: Unknown
- Condition: Malfunctioned
- Location: Apu
- Stage of operation: UK
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2014030390508

## Discrepancy

APU WILL NOT START, SECOND ATTEMPT TO START, NO GOOD.  CYCLED APU CONTROL & ECB CB'S NO HELP.  OK TO DEFER, APU INOPERATIVE IAW MEL 4910B.

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