# SDR ASAA2017052720901

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 27, 2017
- Submitted: May 30, 2017
- Operation: Air carrier
- Aircraft: [N479AS](https://openairdocs.org/aircraft/N479AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 60576
- Aircraft time: 7,475 hours, 2,511 cycles
- System (JASC): [4960 · APU Controls](https://openairdocs.org/jasc/4960)
- Part: Sensor
- Part number: MS280341
- Condition: Faulted
- Location: Apu Inlet Temp
- 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/ASAA2017052720901

## Discrepancy

APU FAULT LIGHT ILLUMINATED AFTER APU SHUTDOWN.  ACFT GROUNDED.  FOUND MESSAGE 49-61223, TROUBLESHOT IAW FIM 49-60, TASK 812, REMOVED AND REPLACED INLET TEMP SENSOR IAW AMM 49-61-31, OPS CHECK NORMAL. APU STARTED SUCCESSFULLY 3 TIMES.

---
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.