# SDR ASAA2017111422582

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 14, 2017
- Submitted: November 16, 2017
- Operation: Air carrier
- Aircraft: [N586AS](https://openairdocs.org/aircraft/N586AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35189
- Aircraft time: 38,480 hours, 11,729 cycles
- System (JASC): [4940 · APU Start/Ignition System](https://openairdocs.org/jasc/4940)
- Part: Ignition Sys
- Part number: 38880587
- Part serial: 120287
- Condition: Failed
- Location: Apu
- Part time: 3,725 hours, 7,826 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/ASAA2017111422582

## Discrepancy

STARTED THE APU, FAULT LIGHT ILLUMINATED. FOLLOWED QRH 7.2 AFTER FAULT LIGHT WENT OUT. ATTEMPTED TO RESTART APU, RECEIVED A FAULT LIGHT AGAIN.  ACFT GROUNDED.  ACCOMPLISHED FIM 49-40, TASK 802. REMOVED AND REPLACED APU IGNITION UNIT IAW AMM 49-41-31. REMOVED AND REPLACED IGNITER PLUG IAW AMM 49-41-51. REMOVED AND REPLACED IGNITER PLUG LEAD IAW AMM 49-41-52. STARTED APU SEVERAL TIMES, NO FAULTS NOTED.

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