# SDR ASAA2016051516756

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 15, 2016
- Submitted: May 18, 2016
- Operation: Air carrier
- Aircraft: [N423AS](https://openairdocs.org/aircraft/N423AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 35206
- Aircraft time: 12,274 hours, 3,967 cycles
- System (JASC): [4940 · APU Start/Ignition System](https://openairdocs.org/jasc/4940)
- Part: Igniter
- Part number: 38880587
- Part serial: 130075
- Condition: Failed
- Location: Apu
- Part time: 2,955 hours, 6,063 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/ASAA2016051516756

## Discrepancy

APU FAULT LIGHT CAME ON AT ATTEMPTED START.  ACFT GROUNDED.  REPLACED IGNITER PLUG AND APU IGNITION UNIT IAW AMM 49-41-51 AND 49-41-31.  OPS TEST GOOD, BITE CHECKED GOOD.

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