# SDR ASAA2013052194870

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 21, 2013
- Submitted: May 25, 2013
- Operation: Air carrier
- Aircraft: [N413AS](https://openairdocs.org/aircraft/N413AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 35205
- Aircraft time: 544 hours, 175 cycles
- System (JASC): [2611 · Smoke Detection](https://openairdocs.org/jasc/2611)
- Part: Fire Detector
- Part number: S332T10044
- Condition: Inoperative
- Location: Nr 1 Engine
- 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/ASAA2013052194870

## Discrepancy

NR 1 ENGINE OVERHEAT LIGHT AND ENGINE NR 1 FIRE HANDLE LIGHT DOES NOT ILLUMINATE.  DURING OVERHEAT/FIRE TEST WITH OVHT DET SWITCH IN NORMAL POSITION.  ACFT GROUNDED.  CONFIRMED FAULT.  ENGINE NR 1 FIRE DETECTION TEST OK IN A OR B SELECTED, BUT FIRE HANDLE LIGHT DOES NOT ILLUMINATE WHEN IN BOTH/NORMAL POSITION.  M279 (E/E) ENGINE/APU FIRE/OVHT DET CONTROL MODULE SHOWS WIRING OPEN/DETECTORS FAULT.  FOUND NR 1 ENGINE UPPER FAN COWL AFT C-CLIP LANYARD RESTING ON THE UPPER FAN B-LOOP SENSOR.  RESECURED LANYARD, NR 1 ENGINE FIRE DETECTION SYS OPS CK NORMAL REF AMM TASK 26-11-00-710-801.

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