# SDR SWAA2012051604080

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 15, 2012
- Submitted: May 17, 2012
- Operation: Air carrier
- Aircraft: [N923WN](https://openairdocs.org/aircraft/N923WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 36627
- Aircraft time: 14,012 hours, 8,361 cycles
- System (JASC): [2612 · Fire Detection](https://openairdocs.org/jasc/2612)
- Part: Electronic Unit
- Part number: 473925
- Part serial: 10925
- Condition: Faulty
- Location: Cargo Bay
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA2012051604080

## Discrepancy

AIR TURNBACK/DECLARED EMERGENCY.  AFT CARGO FIRE LIGHT FIRE BELL ILLUMINATED, SOUNDED CLIMBING THROUGH 17,000 FEET.  PUSHED THE LIGHT & ACTIVATED THE AGENT DISCHARGE & LIGHT & BELL WENT OUT APPROX 5 MINS LATER FIRE LIGHT & BELL CAME BACK ON & REMAINED ON FOR ABOUT 15 SECONDS.   DECLARED EMERGENCY & RETURNED TO PHX.  REMOVED AND REPLACED CARGO FIRE SUPPRESSION HALON BOTTLE PER MM.  REMOVED AND REPLACED AFT CAR FIRE DETECTION ELECTRONICS UNIT PER MM.

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