NONE · BELL BHT407 · 2013-04-25 · Big Fork, MT, USA
Event
NTSB number
WPR13TA205
Event ID
20130423X65502
Type
Accident
Date
2013-04-25
Location
Big Fork, MT, USA
Coordinates
48.153057, -113.923889
Injuries
Highest injury
NONE
Fatal
0
Serious
0
Minor
0
Uninjured
3
Total aboard
3
Aircraft
Make
BELL
Model
BHT407
Registration
N937GR
FAR Part
PUBU
Engines
1
Damage
SUBS
Conditions
Light
DAYL
Weather
VMC
Probable cause
The pilot’s failure to maintain helicopter control while maneuvering over mountainous terrain in strong up/downdrafts and possible mountain wave activity, which resulted in a loss of tail rotor effectiveness.