Accident Cirrus SR22 GTS N518SR,
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ASN Wikibase Occurrence # 291886
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Date:Monday 21 August 2006
Time:12:41 LT
Type:Silhouette image of generic SR22 model; specific model in this crash may look slightly different    
Cirrus SR22 GTS
Registration: N518SR
MSN: 2063
Year of manufacture:2006
Total airframe hrs:26 hours
Engine model:Continental IO-550N
Fatalities:Fatalities: 0 / Occupants: 3
Aircraft damage: Substantial
Location:Mc Rae, Georgia -   United States of America
Phase: Unknown
Departure airport:Athens Airport, GA (AHN/KAHN)
Destination airport:Fort Lauderdale-Executive Airport, FL (FXE/KFXE)
Investigating agency: NTSB
Confidence Rating: Accident investigation report completed and information captured
The airplane experienced an in-flight loss of aircraft control during cruise flight. The pilot initially reported a turbulence encounter at 9,500 feet, and that he saw damage on the upper surface of both wings. He did not recall a significant loss of altitude or loss of control. Data downloaded from the flight displays after the event indicated that the airplane actually climbed to 15,400 feet above mean sea level (msl), nearly 17,500 feet density altitude, which was the maximum operating altitude for the airplane. The airplane then slowed, stalled, and began a rapid descent, losing 13,000 feet of altitude in about 40 seconds before recovering. During recovery, the airplane had an average of more than 4 Gs vertical loading for more than 20 seconds. Such loading would likely have resulted in G-induced loss of consciousness (G-LOC) or near-loss of consciousness. The pilot's apparent failure to accurately recall the events of the flight is likely a result of the confusion associated with hypoxia, and the subsequent confusion and amnesia associated with G-LOC or near G-LOC. It is unclear exactly why the pilot chose to increase his altitude beyond 12,500 feet msl, above which oxygen use would have been required after 30 minutes. Regardless, he continued to climb the airplane above 14,000 feet msl, an altitude above which oxygen use would have been required by the pilot regardless of the time spent at that altitude, and he subsequently climbed to above 15,000 feet, at which point oxygen use would have been required by all occupants. The pilot confirmed that neither he nor his passengers used supplemental oxygen during the flight. Examination of the airplane found no evidence of mechanical failure or malfunctions that would have prevented the airplane from operating normally.

Probable Cause: The pilot's failure to use supplemental oxygen where required, and his failure to maintain sufficient airspeed to avoid a stall.

Accident investigation:
Investigating agency: NTSB
Report number: ATL06LA134
Status: Investigation completed
Duration: 1 year and 8 months
Download report: Final report



Revision history:

08-Oct-2022 06:24 ASN Update Bot Added

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