# SDR ASAA2017092722070

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 27, 2017
- Submitted: October 2, 2017
- Operation: Air carrier
- Aircraft: [N433AS](https://openairdocs.org/aircraft/N433AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41704
- Aircraft time: 15,668 hours, 5,111 cycles
- System (JASC): [4940 · APU Start/Ignition System](https://openairdocs.org/jasc/4940)
- Part: Igniter
- Part number: 38880587
- Part serial: 1016250400466
- Condition: Faulted
- Location: Apu
- Part time: 250 hours, 477 cycles
- Stage of operation: NR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2017092722070

## Discrepancy

APU FAULT LIGHT,  RAN QRH AFTER LIGHT EXTINGUISHED,  ATTEMPTED START, FAULT LIGHT AGAIN. ACFT GROUNDED.  REPLACED THE IGNITER PLUG IAW AMM 49-41-51. REPLACED IGNITION UNIT IAW AMM 49-41-31. APU OPS CHECKED GOOD.

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