# SDR CALA2013112093116

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 16, 2013
- Submitted: November 21, 2013
- Operation: Air carrier
- Aircraft: [N785UA](https://openairdocs.org/aircraft/N785UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 26954
- Aircraft time: 74,188 hours, 10,346 cycles
- Engine: Pwa PW4090
- System (JASC): [2611 · Smoke Detection](https://openairdocs.org/jasc/2611)
- Part: Smoke Detector
- Part number: 22179373
- Part serial: I03050924
- Condition: Failed
- Location: Cargo Bay
- Stage of operation: IN
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2013112093116

## Discrepancy

DETECTOR CHANNEL 1 AFT CARGO COMPARTMENT SMOKE DETECTOR FAILURE.  FAN 1 OF THE LOWER AFT DETECTOR HAS FAILED ONLY.  MEL CARD CHANGED TO REFLECT THIS CONDITION.  REPLACED NR 1 SMOKE DETECTOR FAN IN AFT CARGO PIT IAW MM 26-16-02 DO SYSTEM TEST ON MAT PASSED & MESSAGE ON EICAS IS GONE.

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