Summary
On August 18, 1992, a Mitsubishi MU-2-60 (N66LA) was involved in an incident near Philadelphia, PA. All 2 people aboard were uninjured. The aircraft sustained substantial damage.
The National Transportation Safety Board determined the probable cause of this incident to be: 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.
This incident is documented in NTSB report NYC92LA166. AviatorDB cross-references NTSB investigation data with FAA registry records to provide comprehensive safety information for aircraft N66LA.
Accident Details
Probable Cause and Findings
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.
Aircraft Information
Data Source
Data provided by the National Transportation Safety Board (NTSB). For more information on this event, visit the NTSB Records Search website. NTSB# NYC92LA166