# SDR DXTA2012011804849

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 7, 2012
- Submitted: January 18, 2012
- Operation: Air carrier
- Aircraft: [N140QS](https://openairdocs.org/aircraft/N140QS), registered now
- Make and model: Beech 400A
- Registry model: [Beech 400A](https://openairdocs.org/model/hawker-beechcraft-400a) (OpenAirDocs)
- Aircraft serial: RK406
- Aircraft time: 3,010 hours, 2,787 cycles
- System (JASC): [3240 · Landing Gear Brake System](https://openairdocs.org/jasc/3240)
- Part: Control Box
- Part number: 42901
- Part serial: 802
- Condition: Malfunctioned
- Location: Anti-Skid Sys
- Part time: 31 hours, 25 cycles
- Stage of operation: TX
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DXTA2012011804849

## Discrepancy

DURING TAXI TO RAMP,  RIGHT BRAKE RELEASED FOR 2 SECONDS.  CONTINUED TO SLOW & MADE A SLIGHT RIGHT TURN, APPLYING A LITTLE MORE RIGHT BRAKE THAN LEFT.  AGAIN RT BRAKE RELEASED FOR 2 SECONDS. TAXIING STRAIGHT (6 MPH) BOTH BRAKES RELEASED.  ROLLED FOWARD ABOUT 10 FT & BRAKES CAME BACK. EVERY 10 FT,  BRAKES WOULD ALTERNATE BOTH BRAKES ON & OFF.  SECOND OFFICER TRIED BRAKES AND UPON INITIAL APPLICATION, BRAKES RELEASED & SHARPLY CAME BACK.  WHEN BRAKES RELEASE THERE IS VERY LITTLE TO NO FEEL IN PEDALS.  WHILE BRAKES ARE RELEASED, APPLIED MORE PRESSURE AND NOTHING HAPPENED.  TROUBLESHOT IAW MM 32-40-03, PG 6.  ANTI-SKID CONTROL BOX HAD FAILED.  REPLACED ANTI-SKID CONTROL BOX IAW MM 32-40-00, OPS CHECKED GOOD.

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