Accident Glasair Sportsman 2+2 N535SP,
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ASN Wikibase Occurrence # 161752
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Date:Monday 28 October 2013
Type:Silhouette image of generic GLST model; specific model in this crash may look slightly different    
Glasair Sportsman 2+2
Registration: N535SP
MSN: 7369
Year of manufacture:2012
Total airframe hrs:0 hours
Engine model:Lycoming IO-390-X
Fatalities:Fatalities: 0 / Occupants: 1
Aircraft damage: Substantial
Location:Castle Rock, CO -   United States of America
Phase: Approach
Departure airport:Hayden, CO (HDN)
Destination airport:Denver, CO (FTG)
Investigating agency: NTSB
Confidence Rating: Accident investigation report completed and information captured
A review of air traffic control (ATC) recordings indicated that, after the airplane crossed over the mountains, the pilot checked in with the Denver terminal radar approach controller and expressed concern about the weather at her destination airport. After receiving weather for a closer airport, which included visibility 1.5 miles in mist with a 400-foot overcast ceiling, the pilot changed her destination to that airport. About 3 minutes later, the pilot asked the controller if other pilots had reported icing during descent, and the controller responded that other pilots had reported icing in cloud tops about 9,000 feet mean sea level (msl). The pilot advised that she wanted to change back to her original destination, and, shortly later, the controller cleared the approach. About 20 minutes later, the pilot advised the controller that the airplane was “picking up rime ice,” and, about 3 minutes later, she again asked for clearance to the intermediate airport; the controller cleared that approach. During the approach, the controller issued three low altitude alerts because the airplane was not maintaining the assigned altitudes, and he provided the pilot with the weather information for the destination airport, which included visibility 2 miles in mist, 400 feet overcast, and temperature and dew point below freezing at -1° C. The pilot reported being established on the approach about 3 miles from the final approach fix shortly before the controller issued the third low altitude alert. After this alert, the pilot responded that the airplane was climbing and maintaining altitude and was established on the approach. Shortly later, the controller asked the pilot to indicate the airplane’s altitude, but the pilot did not respond. Radar track data indicated that the airplane was about 6,800 feet msl before radar and radio contact were lost. The airplane subsequently descended and impacted terrain. The airplane likely accumulated ice when the pilot continued flight into known icing conditions, which adversely affected its performance and resulted in a loss of airplane control. ATC services were adequate, and no deficiencies were noted.

Probable Cause: The pilot’s improper decision to continue flight into known icing conditions, which adversely affected the airplane’s performance and resulted in a loss of airplane control.

Accident investigation:
Investigating agency: NTSB
Report number: CEN14FA032
Status: Investigation completed
Download report: Final report


FAA register:



Revision history:

29-Oct-2013 04:16 Geno Added
29-Oct-2013 18:26 harro Updated [Embed code]
07-Nov-2013 23:41 Geno Updated [Nature, Source, Embed code]
21-Dec-2016 19:28 ASN Update Bot Updated [Time, Damage, Category, Investigating agency]
29-Nov-2017 09:17 ASN Update Bot Updated [Operator, Other fatalities, Departure airport, Destination airport, Source, Embed code, Narrative]

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