# SDR YENA2022122301288

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 21, 2022
- Submitted: December 23, 2022
- Operation: Air carrier
- Aircraft: [N937JB](https://openairdocs.org/aircraft/N937JB), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 06245
- Aircraft time: 33,744 hours, 6,542 cycles
- System (JASC): [3240 · Landing Gear Brake System](https://openairdocs.org/jasc/3240)
- Part: Tachometer
- Part number: C201050002
- Part serial: 54863
- Condition: Failed
- Location: Wheel Speed
- Part time: 51,935 hours, 18,283 cycles
- Stage of operation: TX
- 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/YENA2022122301288

## Discrepancy

FLT#620, SAN-BOS. 'BRAKES RELEASED ON ECAM, HAPPENED ON TAKE OFF ROLL. #1 BRAKE INOP. AUTO BRK INOP ON THE STATUS PAGE; PFR & PREV LEGS FAULTS FLAGGING #1 TACHOMETER. REMOVED AND REPLACED #1 TACHOMETER PER AMM 32-42-57. OPS CHECK SATISFACTORY & NO ACTIVE FAULT PRESENT AT THIS TIME. ITEM OK FOR SERVICE. '

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