# SDR CALA2014062000780

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 18, 2014
- Submitted: June 20, 2014
- Operation: Air carrier
- Aircraft: [N25201](https://openairdocs.org/aircraft/N25201), registered now
- Make and model: Boeing 737824
- Aircraft serial: 28958
- Aircraft time: 46,542 hours, 17,064 cycles
- System (JASC): [4960 · APU Controls](https://openairdocs.org/jasc/4960)
- Part: Sensor
- Condition: Intermittent
- Location: Apu
- Stage of operation: CR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2014062000780

## Discrepancy

APU OVER SPEED AUTO SHUT DOWN FL400 SAT - 55 DEGREES C CLEAR.  ALL OTHER INDICATIONS NORMAL.  TROUBLE SHOT IAW FIM 49-30-00-810-802 & PERFORMED APU BITE IAW AMM 49-61 -00.  FOUND FAULT MSG 49-31014 & 49-52219.  R & R INLET PRESS SENSOR IAW AMM 49-52-31 & AS PRECAUTIONARY.  R & R SPEED SENSOR IAW AMM 49-61-21.  APU OPERATION NORMAL, FAULTS NO LONGER CURRENT, OK TO CONTINUE.

---
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.