# SDR CALA2013110592646

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 30, 2013
- Submitted: November 7, 2013
- Operation: Air carrier
- Aircraft: [N491UA](https://openairdocs.org/aircraft/N491UA), registered now
- Make and model: Airbus A320-232
- Registry model: [Airbus A320-232](https://openairdocs.org/model/airbus-a320-232) (OpenAirDocs)
- Aircraft serial: 1741
- Aircraft time: 37,924 hours, 16,588 cycles
- Engine: Iae V2527A5
- System (JASC): [4940 · APU Start/Ignition System](https://openairdocs.org/jasc/4940)
- Part: Ignition Lead
- Condition: Defective
- 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/CALA2013110592646

## Discrepancy

APU WILL NOT START, HANGS AT 18% N1.  REPLACED IGNITION UNIT IAW MM-49-41-38, NO HELP.  REPLACED FUEL CONTROL UNIT FOR TROUBLESHOOTING IAW MM, NO HELP.  REPLACED IGNITER PLUGS & LOWER IGNITION LEAD IAW MMS.  OPERATIONS CHECKED GOOD.

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