NONE · MITSUBISHI MU-2-60 · 1992-08-18 · PHILADELPHIA, PA, USA
Event
NTSB number
NYC92LA166
Event ID
20001211X15511
Type
Accident
Date
1992-08-18
Location
PHILADELPHIA, PA, USA
Coordinates
40.070541, -75.000778
Injuries
Highest injury
NONE
Fatal
0
Serious
0
Minor
0
Uninjured
2
Total aboard
2
Aircraft
Make
MITSUBISHI
Model
MU-2-60
Registration
N66LA
FAR Part
135
Engines
2
Damage
SUBS
Conditions
Light
NDRK
Weather
VMC
Probable cause
THE IN-FLIGHT SEPARATION OF A PROPELLER BLADE AS A RESULT OF FATIGUE CRACKING INITIATED FROM MULTIPLE SITES LOCATED AT CORROSION PITS IN THE BALANCING HOLE. CONTRIBUTING FACTORS IN THE ACCIDENT WERE: THE FAILURE TO DETECT THE CORROSION DURING THE LAST OVERHAUL PROCEDURE; AND A COMPLETE LOSS OF ELECTRICAL POWER AS RESULT OF THE SEPARATED BLADE BREAKING THE ELECTRICAL LINES.