# SDR YENA2023092501124

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 23, 2023
- Submitted: September 25, 2023
- 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: 8,374 hours, 1,585 cycles
- System (JASC): [2421 · AC Generator-Alternator](https://openairdocs.org/jasc/2421)
- Part: Contactor
- Part number: 558CA04A30Y00
- Part serial: 59878
- Condition: Failed
- Location: Apu Generator
- Part time: 8,374 hours, 1,585 cycles
- Stage of operation: UK
- 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/YENA2023092501124

## Discrepancy

FLT#334, SFO-BOS. (ETOPS) 'APU GEN POWER CHANGE OVER FAIL; REMOVED AND REPLACED THREE POLE CONTACTOE IAW AMM 24-23-55. OPS CHECK GOOD. A/C GOOD TO CONTINUED SVC.'

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