# SDR AALA202512222624

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 21, 2025
- Submitted: December 22, 2025
- Operation: Air carrier
- Aircraft: [N110UW](https://openairdocs.org/aircraft/N110UW), registered now
- Make and model: Airbus A320-214
- Registry model: [Airbus A320-214](https://openairdocs.org/model/airbus-a320-214) (OpenAirDocs)
- Aircraft serial: 1112
- Aircraft time: 68,886 hours, 39,897 cycles
- System (JASC): [3240 · Landing Gear Brake System](https://openairdocs.org/jasc/3240)
- Part: Tachometer
- Part number: C201050002
- Condition: Faulty
- Location: Zone 700 - Gears
- Part time: 5,604 hours, 3,249 cycles
- Stage of operation: LD
- How discovered: O
- Nature of condition: E
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202512222624

## Discrepancy

AIRCRAFT WAS GROUNDED: HEAVY PULSING DURING BRAKING ON DECELERATION DURING LANDING ROLLOUT AND INITIAL TAXI AFTER LANDING. PULSING CONTINUED THROUGH ABOUT 25-30 KNOTS AND WENT AWAY BELOW THAT SPEED. RUNWAY WAS DRY DURING LANDING. IT DID NOT FEEL LIKE ANTI SKID. MAINTENANCE FOUND #3 TACH FIN# 20GGAT FAULT AND REPLACED #3 TACH IAW AMM 32-42-57.

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