# SDR CALA2015100600824

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 6, 2015
- Submitted: October 6, 2015
- Operation: Air carrier
- Aircraft: [N15712](https://openairdocs.org/aircraft/N15712), registered now
- Make and model: Boeing 737724
- Aircraft serial: 28783
- Aircraft time: 56,394 hours, 19,288 cycles
- System (JASC): [2613 · Overheat Detection](https://openairdocs.org/jasc/2613)
- Part: Overheat Loop
- Part number: 897003
- Part serial: 7171
- Condition: Defective
- Location: Nr 1 Engine
- Stage of operation: TX
- How discovered: O
- Nature of condition: N
- Precautionary procedure: E, F, D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2015100600824

## Discrepancy

DURING TAXI OUT NR 1 ENG START, THE OVERHEAT DETECTOR ANNUNCIATOR LIGHT CAME ON.  SHORTLY AFTER THE NR 1 ENG FIRE SWITCH LIGHT ALSO ILLUMINATED, NO BELL.  ENG WAS SHUT DOWN, QRH FOLLOWED.  BOTH FIRE BOTTLES USED.  FOUND HIGH RESISTANCE LOOP M1759, REPLACED SAME.  R & R AFT ENG FIRE BOTTLE IAW AMM 26-21-01-400-801.

---
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.