# SDR ASAA2019100733941

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 3, 2019
- Submitted: October 8, 2019
- Operation: Air carrier
- Aircraft: [N563AS](https://openairdocs.org/aircraft/N563AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35180
- Aircraft time: 49,008 hours, 14,636 cycles
- System (JASC): [4940 · APU Start/Ignition System](https://openairdocs.org/jasc/4940)
- Part: Exciter
- Part number: 38880587
- Part serial: 1016250400289
- Condition: Intermittent
- Location: Apu
- Part time: 9,497 hours, 16,970 cycles
- Stage of operation: TX
- 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/ASAA2019100733941

## Discrepancy

APU "FAULT" LIGHT WHEN ATTEMPTED TO START APU AFTER LANDING. GROUNDED - YES. FOUND "NO FLAME SHUTDOWN" FAULT. ACCOMPLISHED B737-800 FIM 49-40 TASK 802. ACCOMPLISHED 2 SUCCESSFUL STARTS, NO FAULTS FOUND. REMOVED AND REPLACED APU EXCITER ASSY AND IGNITER PLUG, PER B737-800 AMM 49-41-31 AND AMM 49-41-51. OPS TEST NORMAL.

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