# SDR AALA202603243865

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 21, 2026
- Submitted: March 24, 2026
- Operation: Air carrier
- Aircraft: [N424AN](https://openairdocs.org/aircraft/N424AN), registered now
- Make and model: Airbus A321-253NX
- Registry model: [Airbus A321-253NX](https://openairdocs.org/model/airbus-a321-253nx) (OpenAirDocs)
- Aircraft serial: 10141
- Aircraft time: 20,664 hours, 5,699 cycles
- System (JASC): [3240 · Landing Gear Brake System](https://openairdocs.org/jasc/3240)
- Part: Brake
- Part number: C20534100
- Part serial: D4909P
- Condition: Locked
- Location: Zone 700
- Part time: 22,111 hours, 8,935 cycles
- Stage of operation: TO
- How discovered: O
- Nature of condition: M, J
- Precautionary procedure: C
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202603243865

## Discrepancy

AIRCRAFT WAS GROUNDED: FLIGHT CREW ACCOMPLISHED AN ABORTED TAKEOFF DUE TO BRAKES HOT ON TAKEOFF. THE FLIGHT CREW REPORTED THAT THE #4 BRAKE TEMP EXCEEDED 3OO DEGREES WHILE ALL OTHER BRAKES WERE BELOW 200.   THE FLIGHT CREW REPORTED THAT AFTER THE LOW-SPEED ABORTED TAKEOFF THE #4 APPROACHED 500 DEG AND ALL OTHERS REMAINED BELOW 255 DEG.  WHILE RETURNING TO GATE WITH BRAKE FANS ON #4 NEVER WENT BELOW 370 ALL OTHER TEMPS BELOW 100. THE FLIGTH CREW NOTED THAT THE AIRCRAFT DRAGGED SLIGHTLY RIGHT ON TAXI. MAINTENANCE FOUND #4 BRAKE TO BE LOCKED UP AND REPLACED THE BRAKE ASSMBLY PER AMM 32-42-07. A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED WITH NO ISSUES NOTED.

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