NTSB Identification: ATL87LA247.
The docket is stored on NTSB microfiche number 35061.
Accident occurred Saturday, August 29, 1987 in PUT IN BAY, OH
Probable Cause Approval Date: 01/11/1989
Aircraft: MOONEY M20F, registration: N9784M
Injuries: 4 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 PLT HEARD A LOUD 'SNAP' WHILE TAXIING TO THE RWY, AND THE LDG GEAR COLLAPSED IMMEDIATELY THEREAFTER. THE PLT OBSERVED THAT THE GEAR HANDLE WAS STILL IN THE DOWN-AND-LOCKED POSITION AND THAT THE GREEN 'GEAR DOWN' LIGHT REMAINED ILLUMINATED. FAA EXAM OF THE MANUALLY OPERATED LDG GEAR SYSTEM REVEALED THAT THE GEAR HANDLE/LEVER ASSY HAD CRACKED AND SEPARATED WHERE IT WAS WELDED TO A CROSS MEMBER. METALLURGICAL EXAM OF THE FRACTURE SURFACES REVEALED EVIDENCE OF BENDING OVERSTRESS SEPARATION. EXAM OF THE ACFT MAINTENANCE RECORDS REVEALED THAT THE LDG GEAR HAD BEEN RE-RIGGED ABOUT 11 FLT HRS BEFORE THE ACCIDENT OCCURRED. THE ACFT MAINTENANCE MANUAL NOTES THAT THE OVERCENTER CONFIGURATION OF THE RETRACTION LINKAGE HOLDS THE GEAR DOWN AND LOCKED, AND WARNS THAT IMPROPER GEAR RIGGING CAN RESULT IN A GEAR COLLAPSE DURING TAXIING OR LDG.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

LANDING GEAR,GEAR LEVER..OVERLOAD

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

MAINTENANCE,ADJUSTMENT..IMPROPER..OTHER MAINTENANCE PERSONNEL


Contributing Factors

LANDING GEAR,GEAR LEVER..CRACKED


Contributing Factors

LANDING GEAR,GEAR LEVER..SEPARATION

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