# SDR ASAA2016061417039

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 14, 2016
- Submitted: June 16, 2016
- Operation: Air carrier
- Aircraft: [N538AS](https://openairdocs.org/aircraft/N538AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 41188
- Aircraft time: 16,173 hours, 4,709 cycles
- System (JASC): [4940 · APU Start/Ignition System](https://openairdocs.org/jasc/4940)
- Part: Ignition Unit
- Part number: 38880587
- Part serial: 016971100095
- Condition: Failed
- Location: Apu
- Part time: 1,400 hours, 2,905 cycles
- Stage of operation: NR
- 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/ASAA2016061417039

## Discrepancy

DURING APU START, FAULT LIGHT ILLUMINATED.  ACFT GROUNDED.  R & R IGNITER PLUG, REF AMM 49-41-51/401, NO FIX.  R & R IGNITION UNIT, REF AMM 49-41-31/401.  OPS CHECKS GOOD AT THIS TIME.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.