# SDR YENA2022091400917

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 12, 2022
- Submitted: September 19, 2022
- Operation: Air carrier
- Aircraft: [N2142J](https://openairdocs.org/aircraft/N2142J), registered now
- Make and model: Airbus A321-271N
- Registry model: [Airbus A321-271N](https://openairdocs.org/model/airbus-a321-271n) (OpenAirDocs)
- Aircraft serial: 10254
- Aircraft time: 4,512 hours, 892 cycles
- System (JASC): [2612 · Fire Detection](https://openairdocs.org/jasc/2612)
- Part: None
- Condition: None
- Stage of operation: CR
- How discovered: V
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/YENA2022091400917

## Discrepancy

FLT#288, LAX-BOS. {ETOPS) 'ENG 1 FIRE LOOP B FAULT ON CLIMB OUT AND BACK AGAIN IN CRUISE. ( ENGINE FIRE DETECTION SYSTEMS 2) LOOP B); ACCOMPLISHED TSMS 26-12-00-810-854 & 855. VENT LOOP B AND CORE AGB LOOP B RESISTANCES ARE W/IN LIMITS. VENT LOOP B: 3227 OHMS, CORE AGB LOOP B: 6840 OHMS, WITHIN LIMITS. BITE CHECK OF FDU PER 26-12-34, NO FAULTS. LAST 9 FLT LEGS, NO FAULTS. ENG 1 LOOP B IS OK FOR SERVICE. THIS CLEARS MDDR 485174. MX-4 UPDATED. MCC NOTIFIED. PLACARD REMOVED. (SUPPLEMENTAL INFORMATION ADDED TO DESCRIPTION)

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