# SDR DXTA2023030381740

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 2, 2023
- Submitted: March 3, 2023
- Operation: Air carrier
- Aircraft: [N304QS](https://openairdocs.org/aircraft/N304QS), registered now
- Make and model: Emb EMB-505
- Registry model: [EMB EMB-505](https://openairdocs.org/model/embraer-executive-emb-505) (OpenAirDocs)
- Aircraft serial: 50500143
- Aircraft time: 7,492 hours, 5,869 cycles
- System (JASC): [3240 · Landing Gear Brake System](https://openairdocs.org/jasc/3240)
- Part: Shimmy Dampener
- Part number: 21174000403
- Part serial: 00157
- Condition: Defective
- Stage of operation: LD
- 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/DXTA2023030381740

## Discrepancy

ON LANDING AS BRAKES WERE APPLIED EXPERIENCED AN EXTREMELY VIOLENT VIBRATION COMING FROM THE NOSE LANDING GEAR ACCOMPANIED WITH EMERGENCY, BRAKE PRESSURE, LOW CAS MESSAGE. VIBRATION STOPPED AT NORMAL. TAXI SPEED WAS ABLE TO TURN OFF RUNWAY ONTO TAXIWAY WHERE HYDRAULIC LOW PRESSURE CAS BREAK FAIL CAS WITH A COMPLETE LOSS OF NORMAL AND EMERGENCY BRAKES.  REMOVED AND REPLACED SHIMMY DAMPENER.  PN 2117-4000-403, SN 00157.  IAW PHENOM 300 AMM 32-21-06.  LEAK CHECK GOOD.

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