# SDR USAA2009091492513

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 13, 2009
- Submitted: September 14, 2009
- Operation: Air carrier
- Aircraft: [N162UW](https://openairdocs.org/aircraft/N162UW), registered now
- Make and model: Airbus A321-211
- Registry model: [Airbus A321-211](https://openairdocs.org/model/airbus-a321-211) (OpenAirDocs)
- Aircraft serial: 1412
- Aircraft time: 30,482 hours, 10,924 cycles
- System (JASC): [2612 · Fire Detection](https://openairdocs.org/jasc/2612)
- Part: Fire Detector
- Part number: 76040102
- Part serial: 9277
- Condition: Defective
- Location: Nr 1 Engine
- Part time: 30,482 hours, 10,924 cycles
- Stage of operation: CR
- How discovered: O
- Nature of condition: N
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/USAA2009091492513

## Discrepancy

FLT 9225 - CLT - FALSE FIRE WARNING - DURING CRUISE AT FL390 DURING LIGHT TURBULENCE, MASTER CAUTION AND FIRE BELL RANG FOR 3 RINGS AND WENT SILENT.  FULL SYSTEMS CHECK AND FIRE/SMOKE CHECK ACCOMPLISHED.  NO FAULTS OR ECAMS INDICATED AND NO REOCCURRENCE OF EVENT DURING FLIGHT.  MAINTENANCE FOUND LAST LEG FAULT "CK FDU ENG 1 SUPPLY".  REPLACED NR 1 ENGINE FIRE DETECTION UNIT 2WD1 IAW AIRBUS MAINTENANCE MANUAL 26-12-34.

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