Accident Kolb Twinstar Mark-III N901JL, Sunday 4 July 1999
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Date:Sunday 4 July 1999
Time:20:10 LT
Type:Kolb Twinstar Mark-III
Owner/operator:Rjr Aviation Inc.
Registration: N901JL
MSN: 1017
Total airframe hrs:47 hours
Engine model:Rotax 912
Fatalities:Fatalities: 2 / Occupants: 2
Other fatalities:0
Aircraft damage: Destroyed
Location:Clark, PA -   United States of America
Phase: Manoeuvring (airshow, firefighting, ag.ops.)
Departure airport:Brookfield, OH (4D2)
Destination airport:
Investigating agency: NTSB
Confidence Rating: Accident investigation report completed and information captured
The homebuilt airplane was observed making multiple low altitude passes over a lake. The airplane was observed to pull up into a vertical climb. When the airplane reached an estimated height of about 300 feet above the water, it continued over onto its back, and then into a nose down attitude similar to a loop. However, the airplane did not recover to level flight, but continued in a nose down attitude and struck the surface of the water. Witnesses reported the sound of the engine remained constant throughout the maneuver. Examination of the airplane revealed flight control continuity was present. The investigation revealed the airplane had been taken without permission of the owner. The pilot did not possess a pilot certificate or FAA airman medical certificate. However, he had flown and worked on ultra-lites.

Probable Cause: The pilot's improper decision to perform an aerobatic maneuver with inadequate altitude for recovery/clearance.

Accident investigation:
Investigating agency: NTSB
Report number: NYC99LA165
Status: Investigation completed
Duration: 11 months
Download report: Final report




Revision history:

24-Oct-2008 10:30 ASN archive Added
21-Dec-2016 19:24 ASN Update Bot Updated [Time, Damage, Category, Investigating agency]
14-Dec-2017 08:43 ASN Update Bot Updated [Operator, Source, Narrative]
07-Apr-2024 19:30 ASN Update Bot Updated [Time, Other fatalities, Source, Narrative, Category, Accident report]

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