# SDR AALA202111290644

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 28, 2021
- Submitted: November 29, 2021
- Operation: Air carrier
- Aircraft: [N549UW](https://openairdocs.org/aircraft/N549UW), registered now
- Make and model: Airbus A300*
- Aircraft serial: 4932
- Aircraft time: 33,291 hours, 12,553 cycles
- System (JASC): [3240 · Landing Gear Brake System](https://openairdocs.org/jasc/3240)
- Part: Tachometer
- Part number: C201050001
- Part serial: 0291
- Condition: Fault Message
- Location: Zone 700 - Gears
- Part time: 64,627 hours, 30,502 cycles
- Stage of operation: TO
- How discovered: V
- Nature of condition: J
- Precautionary procedure: C
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202111290644

## Discrepancy

AIRCRAFT WAS GROUNDED: ON TAKEOFF ROLL, ECAM FOR BRAKES RELEASE; ABORTED TAKEOFF AT 65 KNOTS. REPLACED #4 MLG TACHOMETER WITH SERVICEABLE UNIT IAW AMM 32-42-57, OPS CHECK GOOD.

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