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NTSB Report
August 29, 1987 · Mooney M20F · N9784M
Put In Bay, OH
Overview
Report Status
Preliminary report
Event Type
Accident
Date
August 29, 1987
Injury Outcomes
No injuries (4 uninjured)
Location
Put In Bay, OH
Aircraft
Mooney M20F
Tail Number
N9784M
Injuries
None
Aircraft Damage
Substantial
NTSB Number
ATL87LA247
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.
Full Narrative
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.
Flight
Event TypeAccident
Event Time17:30 EDT
Nearest AirportPut-In-Bay (0nm N)
Runway22
Runway Length2870 ft
Runway Width30 ft
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftMooney M20F
Tail NumberN9784M
Aircraft CategoryAir
DamageSubstantial
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · IO-360-A1A · Reciprocating · 200
Seats4
People & Injuries
Injury SummaryNo injuries (4 uninjured)
Fatal0
Serious0
Minor0
Uninjured4
Total4
Crew 1Age 56 · Second Class
Conditions
ConditionsVMC
LightDaylight
WindCalm
Visibility20 sm
CeilingNone
Temperature / Dew Point0 C / 0 C
Altimeter0
Weather SourcePILO