# SDR CALA2025122312373

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 20, 2025
- Submitted: December 23, 2025
- Operation: Air carrier
- Aircraft: [N436UA](https://openairdocs.org/aircraft/N436UA), registered now
- Make and model: Airbus A320-232
- Registry model: [Airbus A320-232](https://openairdocs.org/model/airbus-a320-232) (OpenAirDocs)
- Aircraft serial: 638
- Aircraft time: 87,610 hours, 35,177 cycles
- System (JASC): [2611 · Smoke Detection](https://openairdocs.org/jasc/2611)
- Part: Smoke Detector
- Part number: PPA110200
- Condition: False Activation
- Location: Zone 100
- Stage of operation: LD
- How discovered: O
- Nature of condition: N
- Precautionary procedure: B
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2025122312373

## Discrepancy

PILOTS REPORT AFT CARGO SMOKE INDICATION ON ECAM WITH ANNUNCIATOR 5-8 MINS FROM LANDING.  NO VISABLE SMOKE IN CABIN & NO ODOR DETECTED. FIRE DEPARTMENT DID NOT PICK UP ANYTHING ON INFRARED SCANNERS AFTER LANDING. UPON OPENING AFT CARGO DOOR,  NO UNUSUAL CONDITIONS WERE IMMEDIANTLY NOTICED.   FAULT WAS NOT ACTIVE & NO HISTORY OF FAULT IN 90 DAYS. POST FLT REPORT SHOWS SMOKE DET FAULT, FAILURE MSG, SMOKE DET LOOP. REF TSM 26-17-00-810-807-A FOR SMOKE DET LOOP FAULT, ACCOMPLISHED TEST OF AFT PIT SMOKE DETECTORS & TEST PASSED. ACCOMPLISHED VISUAL INSP OF DETECTORS & CONNECTORS IN AFT PIT & NO DEFECTS NOTED.  REPLACED AFT TWO SMOKE DETECTORS IN AFT PIT, 5WH & 6WH AS A PRECAUTION IAW AMM 26-16-15-400-001-A, & INSTALLATION TEST PASSED.

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