# SDR MTNA20170922001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 22, 2017
- Submitted: September 25, 2017
- Operation: Air carrier
- Aircraft: [N800FX](https://openairdocs.org/aircraft/N800FX), registered now
- Make and model: Aerosp ATR72
- Aircraft serial: 336
- Aircraft time: 36,919 hours, 39,250 cycles
- System (JASC): [2612 · Fire Detection](https://openairdocs.org/jasc/2612)
- Part: Control Unit
- Condition: Malfunctioned
- Location: Nr 2 Fire Loop
- Stage of operation: AP
- How discovered: O
- Nature of condition: N
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/MTNA20170922001

## Discrepancy

WHILE ON APPROACH, THE NR 2 ENGINE FIRE WARNING ANNUNCIATED. THE CREW  DECLARED AN EMERGENCY. THE AIRCRAFT LANDED WITHOUT INCIDENT.  A DVI OF THE FIRE-DETECTION SYSTEM WAS PERFORMED, AND THE SENDING ELEMENTS WERE CHECKED FOR RESISTANCE AND CLEANED. THE NR 2 ENGINE FIRE-DETECTION CONTROL UNIT WAS REPLACED, OPS CHECKED GOOD, AND THE AIRCRAFT WAS RETURNED TO SERVICE.

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