Accident Glasair GlaStar N513GC,
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ASN Wikibase Occurrence # 157775
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Date:Thursday 25 July 2013
Type:Silhouette image of generic GLST model; specific model in this crash may look slightly different    
Glasair GlaStar
Registration: N513GC
MSN: 5330
Year of manufacture:2006
Total airframe hrs:66 hours
Engine model:SUBARU EJ22
Fatalities:Fatalities: 1 / Occupants: 2
Aircraft damage: Destroyed
Location:Near Columbus Municipal Airport (KBAK), Columbus, IN -   United States of America
Phase: Take off
Departure airport:Columbus, IN (BAK)
Destination airport:Columbus, IN (BAK)
Investigating agency: NTSB
Confidence Rating: Accident investigation report completed and information captured
Family members and friends reported that, 2 years before the accident, the experimental, amateur-built airplane had experienced a serious in-flight engine problem. Since that time, the pilot had been repairing the engine and propeller system, and the accident flight was the airplane's first flight following the reported engine problem.
The pilot-rated passenger reported that, just after departing for a short local flight and turning the airplane to enter the downwind leg of the airport traffic pattern, the pilot informed him that there was a problem and that they needed to return to the airport. He added that the pilot began working "frantically on an electric switch for the propeller" while the engine was "screaming" but that the airplane continued descending. The airplane struck a tree and then impacted a house. An explosion and a postimpact fire immediately ensued, which consumed most of the airplane and the house. The pilot and passenger were able to exit the burning wreckage without assistance.
An examination of the engine clutch and gear reduction module found some metal contamination and a nonstandard displacement of the sprag clutch elements, and these issues likely resulted in clutch slippage, which can lead to the uncommanded movement of the propeller blades. The propeller blades were observed to be in about 5 degrees of reverse pitch, which would result in a substantial loss of glide capability.
Probable Cause: Slippage in the engine clutch and gear reduction module and a resultant uncommanded movement of the propeller blades into reverse thrust.

Accident investigation:
Investigating agency: NTSB
Report number: CEN13LA433
Status: Investigation completed
Download report: Final report





Revision history:

25-Jul-2013 15:26 78Delta Updated [Aircraft type, Registration, Cn, Operator, Source]
25-Jul-2013 15:46 Geno Added [[Aircraft type, Registration, Cn, Operator, Source]]
25-Jul-2013 15:47 Geno Updated [Aircraft type]
25-Jul-2013 19:25 Geno Updated [Aircraft type, Registration, Cn, Operator, Source, Narrative]
25-Jul-2013 19:28 harro Updated [Aircraft type, Operator]
26-Jul-2013 01:51 chullian1819 Updated [Embed code]
04-Aug-2013 01:53 gerard57 Updated [Total fatalities, Source, Narrative]
21-Dec-2016 19:28 ASN Update Bot Updated [Time, Damage, Category, Investigating agency]
29-Nov-2017 08:48 ASN Update Bot Updated [Other fatalities, Nature, Departure airport, Destination airport, Source, Narrative]

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