# SDR AALA202309121421

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 10, 2023
- Submitted: September 12, 2023
- Operation: Air carrier
- Aircraft: [N910NN](https://openairdocs.org/aircraft/N910NN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 31160
- Aircraft time: 32,109 hours, 13,816 cycles
- System (JASC): [3240 · Landing Gear Brake System](https://openairdocs.org/jasc/3240)
- Part: Schrader Valve
- Part number: UNKNOWN
- Condition: Loose
- Location: Zone 100 - Fuse
- Stage of operation: TX
- How discovered: O
- Nature of condition: K
- Precautionary procedure: C
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202309121421

## Discrepancy

AIRCRAFT WAS GROUNDED. AIRCRAFT ABORTED TAKEOFF AT 40 KNOTS DUE TO AIRCRAFT YAWED TO THE RIGHT DURING TAKE OFF ROLL, VIBRATION FELT IN BRAKE PEDAL. TROUBLESHOOT FOUND HYDRAULIC SYSTEM A AND B SCHRADER VALVE LOOSE AND LEAKING. 0 HEAD PRESSURE. TIGHTENED AND SECURED SHRADER, AND SERVICE BRAKE PRESSURE. PER FIM 32-44-00-810.

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