# SDR ASAA2017051820829

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 18, 2017
- Submitted: May 22, 2017
- Operation: Air carrier
- Aircraft: [N419AS](https://openairdocs.org/aircraft/N419AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41734
- Aircraft time: 16,505 hours, 5,430 cycles
- System (JASC): [4940 · APU Start/Ignition System](https://openairdocs.org/jasc/4940)
- Part: Ignition Sys
- Part number: 38880587
- Part serial: 130062
- Condition: Failed
- Location: Apu
- Part time: 4,102 hours, 8,414 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/ASAA2017051820829

## Discrepancy

APU FAILED TO START WITH A FAULT LIGHT.  ACFT GROUNDED.  ACCOMPLISHED AMM 49-40, TASK 802.   REMOVED AND REPLACED THE IGNITION UNIT IAW AMM 49-41-31 AND IGNITER PLUG IAW AMM 49-41-51 OPS CHECKED GOOD.

---
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.