# SDR YENA2025041100388

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 10, 2025
- Submitted: April 11, 2025
- Operation: Air carrier
- Aircraft: [N4077J](https://openairdocs.org/aircraft/N4077J), 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: 11604
- Aircraft time: 5,302 hours, 810 cycles
- System (JASC): [2612 · Fire Detection](https://openairdocs.org/jasc/2612)
- Part: Fire Loop
- Condition: Faulted
- Location: Zone 400
- Stage of operation: CR
- 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/YENA2025041100388

## Discrepancy

FLT#33,BOS -CDG. (ETOPS) 'ENG 1 FIRE LOOP B FAULT AT CRUISE ALT. ALL INDICATIONS NORMAL (CLEARED ITSELF AFTER 30 MINS) ( ENGINE FIRE DETECTION SYSTEMS 2) LOOP B ); REMOVED AND REPLACE PYLON FIRE DETECTOR ENG #1 FIRE LOOP B IAW AMM 26-12-16. OPS CHECK GOOD, MDDR CLEARED. MX-4 UPDATED.

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