# SDR AALA202603278213

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 26, 2026
- Submitted: March 27, 2026
- Operation: Air carrier
- Aircraft: [N549UW](https://openairdocs.org/aircraft/N549UW), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 4932
- Aircraft time: 46,471 hours, 18,623 cycles
- System (JASC): [3240 · Landing Gear Brake System](https://openairdocs.org/jasc/3240)
- Part: Tachometer
- Part number: C201050002
- Part serial: 63104
- Condition: Warning Message
- Location: Zone 700
- Part time: 46,472 hours, 18,624 cycles
- Stage of operation: AP
- How discovered: V
- Nature of condition: J
- Precautionary procedure: L
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202603278213

## Discrepancy

AIRCRAFT WAS GROUNDED: FLIGHT CREW REPORTED THAT ON FINAL APPROACH, THEY RECEIVED A MASTER CAUTION AND ECAM STATING BRAKES RELEASED. THE FLIGHT CREW EXECUTED A GO-AROUND, ANALYZED THE ECAM, AND SUBSEQUENTLY LANDED USING MANUAL BRAKING. NO BRAKING ISSUES WERE NOTED DURING TAXI. MAINTENANCE REPLACED THE #2 MAIN LANDING GEAR AXLE TACHOMETER PER AMM 32-42-57-400-001-A AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK WITH NO FAULTS NOTED.

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