# SDR ASAA2016031115869

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 11, 2016
- Submitted: March 14, 2016
- Operation: Air carrier
- Aircraft: [N596AS](https://openairdocs.org/aircraft/N596AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35688
- Aircraft time: 30,172 hours, 9,244 cycles
- System (JASC): [2612 · Fire Detection](https://openairdocs.org/jasc/2612)
- Part: Fire Detector
- Part number: 902864
- Condition: No Test
- Location: Nr 2 Nacelle
- Stage of operation: IN
- How discovered: C
- Nature of condition: L
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2016031115869

## Discrepancy

DURING ENGINE FIRE TEST THE NR 2 ENGINE FIRE HANDLE WOULD NOT ILLUMINATE. A SYSTEM FAULT LIGHT ON NR 2 ENGINE OVERHEAT DETECTION.  ACFT GROUNDED. ENGINE & APU FIRE/OVERHEAT DETECTION MODULE INDICATED NR 2 ENGINE "A" LOOP UPPER FAN DETECTOR FAULT.  INSPECTED UPPER FAN LOOP & WIRE TERMINAL CONNECTIONS.  NO DEFECTS NOTED. REPLACED NR 2 ENGINE UPPER FAN FIRE DETECTOR ASSY M1757.  OPS CHECK NORMAL, REF AMM 26-11-01, FIM 26-10, TASKS 801 & 805 & WDM 26-11-11.

---
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.