# SDR ASAA2017110422434

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 4, 2017
- Submitted: November 8, 2017
- Operation: Air carrier
- Aircraft: [N403AS](https://openairdocs.org/aircraft/N403AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41730
- Aircraft time: 20,073 hours, 6,593 cycles
- System (JASC): [4940 · APU Start/Ignition System](https://openairdocs.org/jasc/4940)
- Part: Exciter
- Part number: 38880587
- Part serial: 100172
- Condition: Failed
- Location: Apu
- Part time: 1,750 hours, 3,512 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/ASAA2017110422434

## Discrepancy

APU FAULT ILLUMINATED.  ACFT GROUNDED.  PERFORMED FIM 49-40,  802.  REMOVED AND REPLACED IGNITER PLUG IAW AMM 49-41-51, NO HELP. REMOVED & REPLACED APU IGNITION LEAD, IAW AMM 49-41-52. REMOVED & REPLACED APU IGNITION EXCITER IAW AMM 49-41-31. OPS CHECKED GOOD.

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