MINR · AIR TRACTOR AT-401 · 2014-08-19 · Wray, CO, USA
Event
NTSB number
CEN14LA439
Event ID
20140819X34156
Type
Accident
Date
2014-08-19
Location
Wray, CO, USA
Coordinates
40.100276, -102.240837
Injuries
Highest injury
MINR
Fatal
0
Serious
0
Minor
1
Uninjured
0
Total aboard
1
Aircraft
Make
AIR TRACTOR
Model
AT-401
Registration
N4542W
FAR Part
137
Engines
1
Damage
SUBS
Conditions
Light
DAYL
Weather
VMC
Probable cause
A loss of the No. 1 cylinder’s compression due to a stuck exhaust valve caused by a lack of sufficient valve clearance, which resulted in a loss of engine power and a forced landing. Contributing to the loss of engine power were the worn intake and exhaust valves in cylinders No. 3 and 4.