# SDR AALA202504247980

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 23, 2025
- Submitted: April 24, 2025
- Operation: Air carrier
- Aircraft: [N979AN](https://openairdocs.org/aircraft/N979AN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 29568
- Aircraft time: 46,945 hours, 19,799 cycles
- System (JASC): [3241 · Brake Anti-Skid Section](https://openairdocs.org/jasc/3241)
- Part: Shutoff Valve
- Part number: EM91795
- Part serial: 70904556
- Condition: Faulted
- Location: Zone 100
- Part time: 10,192 hours, 10,192 cycles
- Stage of operation: TX
- How discovered: O
- Nature of condition: N
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202504247980

## Discrepancy

AIRCRAFT WAS GROUNDED: WHILE TAXIING FOR TAKEOFF, GOT AN AMBER ANTI-SKID INOPERATIVE LIGHT ASSOCIATED WITH A RED PARKING BRAKE LIGHT. THE RED PARKING BRAKE LIGHT STAYS ILLUMINATED EVEN WHEN THE PARKING BRAKE LEVER IS RELEASED. BRAKES SEEM TO BE WORKING NORMALLY WHILE TAXIING. PER FIM 32-42-00-810-829. REMOVED AND REPLACED PARKING BRAKE SHUTOFF VALVE. PER AMM 32-44-21. OPERTIONAL AND LEAK CHECK GOOD.

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