NONE · EUROCOPTER DEUTSCHLAND GMBH MBB BK 117 C-2 · 2017-01-27 · Sioux Falls, SD, USA
Event
NTSB number
CEN17IA094
Event ID
20170131X24430
Type
Incident
Date
2017-01-27
Location
Sioux Falls, SD, USA
Coordinates
43.578334, -96.748054
Injuries
Highest injury
NONE
Fatal
0
Serious
0
Minor
0
Uninjured
3
Total aboard
3
Aircraft
Make
EUROCOPTER DEUTSCHLAND GMBH
Model
MBB BK 117 C-2
Registration
N911MK
FAR Part
135
Engines
2
Damage
MINR
Conditions
Light
NITE
Weather
VMC
Probable cause
The gas generator rear bearing oil scavenge line blocked with coke, which resulted in a failed rear bearing due to an excess of oil lubrication. Contributing to the incident was the operator not completely performing the maintenance items and not utilizing an oil for higher temperatures.