NTSB Identification: CHI92LA117
Accident occurred Friday, March 20, 1992 in LANGDON, ND
Probable Cause Approval Date: 07/23/1993
Aircraft: Beech F33A, registration: N2046W
Injuries: 1 Uninjured.
NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.
THE PILOT EXTENDED THE GEAR MANUALLY FOLLOWING A COMPLETE ELECTRICAL FAILURE. ACCORDING TO THE PILOT, HE TURNED THE LANDING GEAR HANDCRANK UNTIL HE FELT HEAVY RESISTANCE AND HE THOUGHT THE LANDING GEAR WAS DOWN AND LOCKED; HOWEVER, DURING LANDING, THE GEAR COLLAPSED. POST ACCIDENT INSPECTION OF THE AIRPLANE'S ELECTRICAL SYSTEM DISCLOSED A BROKEN BRUSH IN THE ALTERNATOR.
The National Transportation Safety Board determines the probable cause(s) of this accident to be: FAILURE OF THE PILOT TO FULLY EXTEND THE LANDING GEAR USING MANUAL PROCEDURES AFTER AN ELECTRICAL SYSTEM FAILURE. A FACTOR ASSOCIATED WITH THE ACCIDENT IS THE PILOT MISREADING A PUBLISHED EMERGENCY PROCEDURE.
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