# SDR DXTA2026020206726

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 29, 2026
- Submitted: February 2, 2026
- Operation: Air carrier
- Aircraft: [N486QS](https://openairdocs.org/aircraft/N486QS), registered now
- Make and model: Emb EMB-505
- Registry model: [EMB EMB-505](https://openairdocs.org/model/embraer-executive-emb-505) (OpenAirDocs)
- Aircraft serial: 50500840
- Aircraft time: 1,133 hours, 910 cycles
- System (JASC): [3150 · Central Warning](https://openairdocs.org/jasc/3150)
- Part: Warning System
- Condition: No Discrepancy
- Stage of operation: CR
- 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/DXTA2026020206726

## Discrepancy

AT FL410 WE ENCOUNTERED SEVERE TURBULENCE. ACFT OVERSPEED TWICE WITH 10KTS IAS ABOVE VMO. SPEED BRAKES DEPLOYED WITH IDLE THRUST TO ATTEMPT TO COUNTERACT CONDITION. OVERSPEED LASTED APPROX 3 SECS EACH WITH AT LEAST 2 AURAL WARNINGS OF HIGH SPEED EACH TIME.   AT FL410 ENCOUNTERED SEVERE TURBULENCE. GOT +/-300 FT DEVIATIONS & ACFT HAD SUBSTANTIAL PITCH & ROLL CHANGES. INITIATED AN EMERGENCY DESCENT DUE TO LACK OF CONTROL, & HAD  AP, YD, AHRS 1/2 & SWPS FAIL CASS PRESENT. ABLE TO GET TO FL260 & THEN THE CASS MESSAGES WENT AWAY, WITH ALL SYS INDICATING NORMAL.  NO ABNORMALITIES NOTICED AFTER TURBULENCE EVENT.   POWERED ACFT ON EXTERNAL POWER.  TECHS PERFORMED AHRS OPS TEST IAW MM 34-21-00, NO DEFECTS NOTED. DEPOWERED ACFT.  POWERED ACFT ON GPU POWER & AGAIN PERFORMED THE OPS TEST OF AHRS IAW MM 34-21-00, NO DEFECTS NOTED. DEPOWERED ACFT.  SINCE NO DEFECTSNOTED, ACFT IS TO BE RELEASED & FAULT MONITORED. CONTACTED MCC DISCUSSED FINDINGS. MCC AGREED WITH CONTACT CENTER & ADVISED THAT NO FURTHER ACTION IS REQUIRED.

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