# SDR ASAA1159422

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 10, 2011
- Submitted: April 13, 2011
- Operation: Air carrier
- Aircraft: [N586AS](https://openairdocs.org/aircraft/N586AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35189
- Aircraft time: 13,203 hours, 4,291 cycles
- System (JASC): [4940 · APU Start/Ignition System](https://openairdocs.org/jasc/4940)
- Part: Exciter
- Part number: 38880585
- Part serial: 076971101863
- Condition: Faulty
- Location: Apu
- Part time: 3,657 hours, 4,373 cycles
- Stage of operation: TX
- How discovered: O
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA1159422

## Discrepancy

NR 1 START ON APU NO LIGHT OFF WITH FAULT LIGHT ILLUMINATED.  NR 2 START ON APU NO LIGHT OFF LOW OIL PRESS LIGHT ONLY ILLUMINATED.  REPLACED APU IGNITER BOX. PER MM 49 41 31 000 AND 49 41 31 400.  OPS CHECK GOOD.

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