# SDR DXTA2023071090560

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 7, 2023
- Submitted: July 10, 2023
- Operation: Air carrier
- Aircraft: [N407QS](https://openairdocs.org/aircraft/N407QS), registered now
- Make and model: Emb EMB-505
- Registry model: [EMB EMB-505](https://openairdocs.org/model/embraer-executive-emb-505) (OpenAirDocs)
- Aircraft serial: 50500405
- Aircraft time: 5,068 hours, 3,971 cycles
- System (JASC): [3240 · Landing Gear Brake System](https://openairdocs.org/jasc/3240)
- Part: Control Module
- Part number: DAP0010102
- Part serial: 038VJ
- Condition: Defective
- Location: Zone 100
- Stage of operation: TX
- How discovered: C
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DXTA2023071090560

## Discrepancy

AFTER NORMAL START WITHOUT GPU, WE STARTED TAXIING AND DID THE NORMAL BRAKE CHECK.  AFTER MOVING ABOUT 60' ONTO A TAXIWAY I GENTLY APPLIED THE BRAKES AND GOT A YELLOW CAS BRAKE FAIL. THE BRAKES PEDALS THEN FELT AS IF THERE WAS NO PRESSURE. I USED THE PARKING BRAKE TO STOP. TOUBLESHOT TO FAULTY BRAKE CONTROL MODULE, REMOVED AND REPLACED BRAKE CONTROL MODULE IN ACCORDANCE WITH PHENOM 300MM 32-41-07, COMPLIED WITH HYDRALIC SYSTEM OPS CHECK IN ACCORDANCE WITH PHENOM 300MM 29-10-00 NO DEFECTS NOTED. COMPUED WITH BRAKE SYSTEM FUNCTIONAL CHECK IAW MM 32-41-00, NO DEFECTS NOTED, LEAK CHECK PERFORMED NO DEFECTS NOTED,

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