# SDR F3LA202609040447

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 2, 2026
- Submitted: September 5, 2026
- Operation: Air carrier
- Aircraft: [N665FR](https://openairdocs.org/aircraft/N665FR), registered now
- Make and model: Airbus A321-271NX
- Registry model: [Airbus A321-271NX](https://openairdocs.org/model/airbus-s-a-s-a321-271nx) (OpenAirDocs)
- Aircraft serial: 12390
- Aircraft time: 4,260 hours, 2,062 cycles
- System (JASC): [2611 · Smoke Detection](https://openairdocs.org/jasc/2611)
- Part: Smoke Warning
- Condition: Illuminated
- Location: Zone 100
- Part time: 4,260 hours, 2,062 cycles
- Stage of operation: CR
- How discovered: O
- Nature of condition: B, J
- Precautionary procedure: F, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/F3LA202609040447

## Discrepancy

AIR TURN BACK FOR SMOKE, AFT CARGO DETECTION.  INBND FLT NR 2633. OTBND FLT NR  2607.  FLHT CREW DISCHARGED AFT CARGO BOTTLE 1 (FIN 4005WX) & BOTTLE 2 (FIN 4010WX) IS ON A TIME DELAY CIRCUIT & DISCHARGED 1 HR LATER.  ACFT GROUNDED. R & R FIRE BOTTLES IAW AMM 26-23-42-400-001, R & R HALON FILTERS IAW AMM 26-23-14-400-001, CLEANED OUT & INSP OF LINES FOR FIRE SYS IAW AMM 26-23-00-200-005-A SUBTASK 26-23-00-220-051-B, R & R OF NEW PRESSURE REDUCERS IAW AMM 26-23-18-400-001, R & R OF NEW CHK VALVES IAW AMM  26-23-21-400-001, R & R DIAPHRAM IAW AMM 26-23-25-400-001, REPLACED OF SMOKE DETECTORS.   MEL 26-16-04A CN1254856 WAS PLACED & ACFT RTS.

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