Accident Robinson R22 VH-COS, Wednesday 21 September 1994

You can contribute by submitting additional or updated information.

Date:	Wednesday 21 September 1994
Time:	13:00 LT
Type:	Robinson R22
Owner/operator:	Same As Registered Owner
Registration:	VH-COS
MSN:	619
Total airframe hrs:	1354 hours
Engine model:	Lycoming O-320
Fatalities:	Fatalities: 0 / Occupants: 2
Other fatalities:	0
Aircraft damage:	Substantial
Category:	Accident
Location:	Benson, AZ - United States of America
Phase:	Approach
Nature:	Ferry/positioning
Departure airport:	Goodyear, AZ (KGDY)
Destination airport:	Grand Prairie, TX (F67)
Investigating agency:	NTSB
Confidence Rating:	Accident investigation report completed and information captured

Narrative:
THE PILOT REPORTED THAT HE FELT A VIBRATION AND ELECTED TO EXECUTE A PRECAUTIONARY LANDING TO A CONFINED AREA. DURING THE LANDING APPROACH, THE PILOT OBSERVED HIGH VEGETATION IN THE SELECTED LANDING AREA AND INITIATED A GO-AROUND. DURING THE GO-AROUND, THE MAIN ROTOR RPM DECAYED AND THE HELICOPTER LANDED HARD AND ROLLED OVER. EXAMINATION OF THE HELICOPTER DISCLOSED NO EVIDENCE OF ANY PREEXISTING MALFUNCTIONS OR FAILURES.

Probable Cause: the pilot's failure to maintain adequate main rotor rpm during a go-around attempt.

Accident investigation: