4 fatal · MBB BK 117 B-1 · 1991-01-27 · SONESTOWN, PA, USA
Event
NTSB number
NYC91FA067
Event ID
20001212X16367
Type
Accident
Date
1991-01-27
Location
SONESTOWN, PA, USA
Injuries
Highest injury
FATL
Fatal
4
Serious
0
Minor
0
Uninjured
0
Total aboard
4
Aircraft
Make
MBB
Model
BK 117 B-1
Registration
N891GM
FAR Part
091
Engines
2
Damage
DEST
Conditions
Light
NDRK
Weather
IMC
Probable cause
THE PILOT'S INADEQUATE PREFLIGHT PLANNING TO ASSURE THAT THE INTENDED COURSE AND ALTITUDE PROVIDED ADEQUATE TERRAIN CLEARANCE. CONTRIBUTING FACTOR(S) WAS: THE DARK NIGHT, SNOW AND MOUNTAINOUS TERRAIN.