# SDR YENA2025072500764

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 24, 2025
- Submitted: July 25, 2025
- Operation: Air carrier
- Aircraft: [N4048J](https://openairdocs.org/aircraft/N4048J), 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: 10446
- Aircraft time: 15,031 hours, 2,228 cycles
- System (JASC): [2612 · Fire Detection](https://openairdocs.org/jasc/2612)
- Part: Fire Detector
- Part number: 9090120201
- Part serial: A0052341
- Condition: Faulted
- Location: Zone 400
- Part time: 11,732 hours, 2,232 cycles
- Stage of operation: NR
- 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/YENA2025072500764

## Discrepancy

FLT#32, AMS-BOS. (ETOPS) "ENG FIRE LOOP FAULT LOOP B ( ENGINE FIRE DETECTION SYSTEMS 2) LOOP B ); REF LPS 3504565-1/2 (REPLACED ENG 2 PYLON LOOP B HARNESS 41WD2 IAW AMM 26-12-63. OPS CHKS REQD REF LP 3504569-1 FOR OPS CHKS) AND 3504566-1/2(REPLACED ENG 2 PYLON LOOP B 4WD2 IAW AMM 26-12-16 OPS CHKS REQD REF LP 3504569-1 FOR OPS CHKS) (REPLACED ENG 2 PYLON LOOP B/A RACK ASSY IAW AMM 26-12-16) FOR TROUBLE SHOOTING AND CORRECTIVE ACTIONS MDDR CLEARED MX-4 UPDATED PLACARD REMOVED.

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