NONE · SCHWEIZER 269C-1 · 2012-05-26 · Chesterfield, MO, USA
Event
NTSB number
CEN12LA353
Event ID
20120611X14804
Type
Accident
Date
2012-05-26
Location
Chesterfield, MO, USA
Coordinates
38.662223, -90.651947
Injuries
Highest injury
NONE
Fatal
0
Serious
0
Minor
0
Uninjured
1
Total aboard
1
Aircraft
Make
SCHWEIZER
Model
269C-1
Registration
N345MH
FAR Part
091
Engines
1
Damage
SUBS
Conditions
Light
DAYL
Weather
VMC
Probable cause
The undercharged and overcharged landing gear dampers, which allowed initiation of the ground resonance event from which the pilot was unable to recover due to his limited experience in helicopters. Contributing to the accident was the ineffective damper inspection conducted by the operator’s maintenance personnel and the improper overhaul procedure by the overhaul facility that resulted in overcharged dampers being provided to the operator. Also contributing was the lack of any final acceptance testing criteria for the dampers in the manufacturer’s overhaul procedure manual.