Accident Pitts S1 C-GPUR, Tuesday 5 July 1994

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Date:	Tuesday 5 July 1994
Time:	17:17 LT
Type:	Pitts S1
Owner/operator:	Private
Registration:	C-GPUR
MSN:	R-2
Engine model:	Lycoming O-360-A1A
Fatalities:	Fatalities: 0 / Occupants: 1
Other fatalities:	0
Aircraft damage:	Substantial
Category:	Accident
Location:	Heber City, UT - United States of America
Phase:	Landing
Nature:	Private
Departure airport:
Destination airport:
Investigating agency:	NTSB
Confidence Rating:	Accident investigation report completed and information captured

Narrative:
THE PILOT STATED THAT HE LANDED SOMEWHAT HARD ON THE MAIN LANDING GEAR, RECORDING 2 G'S ON HIS ACCELEROMETER. THE RIGHT MAIN LANDING GEAR WHEEL AND AXLE SEPARATED AND THE LANDING GEAR STRUT COLLAPSED. POST-CRASH INSPECTION REVEALED THAT THE FOUR ATTACHMENT BOLTS WERE EXCESSIVELY WORN AND WERE APPARENTLY IMPROPERLY TORQUED.

Probable Cause: FAILURE OF MAIN LANDING GEAR AXLE HARDWARE. FACTORS INCLUDE COLLAPSE OF MAIN LANDING GEAR STRUT.

Accident investigation: