# SDR IPXA2025121057370

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 10, 2025
- Submitted: December 10, 2025
- Operation: Air carrier
- Aircraft: [N422UP](https://openairdocs.org/aircraft/N422UP), registered now
- Make and model: Boeing 757-24APF
- Registry model: [Boeing 757-24APF](https://openairdocs.org/model/boeing-757-24apf) (OpenAirDocs)
- Aircraft serial: 25324
- Aircraft time: 36,452 hours, 23,787 cycles
- System (JASC): [3240 · Landing Gear Brake System](https://openairdocs.org/jasc/3240)
- Part: Brake
- Condition: Inoperative
- Location: Parking
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/IPXA2025121057370

## Discrepancy

UPON BLOCK IN AT DF THE PARKING BRAKE WAS SET THE BRAKES WERE RELEASED AND I FELT THE A\C MOVING .  LOOKED UP AND QUICKLY SET THE FOOT BRAKES.  ATTEMPTED TO SET THE PARKING BRAKE BUT IT WOULD NOT HOLD TESTED BRAKE IAH FIM 32-44. NORMAL OPERATION

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