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NTSB Report
December 20, 1984 · Grumman AA-5B · N74463
Corona, CA
Overview
Report Status
Preliminary report
Event Type
Accident
Date
December 20, 1984
Injury Outcomes
2 injuries (2 serious injuries)
Location
Corona, CA
Aircraft
Grumman AA-5B
Tail Number
N74463
Injuries
Serious
Aircraft Damage
Destroyed
NTSB Number
LAX85FA078
DURING MAINT OF THE ENG, & JUST BEFORE THE ANNUAL INSPECTION WAS SIGNED OFF, SOMEONE PARTIALLY LOOSENED & THEN ATTEMPTED TO TIGHTEN THE BOLT SECURING THE CRANKSHAFT GEAR TO THE CRANKSHAFT. THE OLD LOCKPLATE WAS NOT REPLACED & WAS NOT PROPERLY SECURED ABOUT THE BOLT. AS A RESULT OF A LOOSE BOLT THE DOWEL PIN, ALIGNING THE GEAR WITH THE CRANKSHAFT, THE GEAR SHIFTED POSITION & THE ENGINE STOPPED. THE PLT FAILED TO LOWER THE WING FLAPS, & STRUCK A DIRT DITCH SHORT OF HIS INTENDED EMERG LANDING SITE.
Full Narrative
DURING MAINT OF THE ENG, & JUST BEFORE THE ANNUAL INSPECTION WAS SIGNED OFF, SOMEONE PARTIALLY LOOSENED & THEN ATTEMPTED TO TIGHTEN THE BOLT SECURING THE CRANKSHAFT GEAR TO THE CRANKSHAFT. THE OLD LOCKPLATE WAS NOT REPLACED & WAS NOT PROPERLY SECURED ABOUT THE BOLT. AS A RESULT OF A LOOSE BOLT THE DOWEL PIN, ALIGNING THE GEAR WITH THE CRANKSHAFT, THE GEAR SHIFTED POSITION & THE ENGINE STOPPED. THE PLT FAILED TO LOWER THE WING FLAPS, & STRUCK A DIRT DITCH SHORT OF HIS INTENDED EMERG LANDING SITE.
Flight
Event TypeAccident
Event Time11:30 PST
Nearest AirportCorona Municipal (2nm SW)
Runway25
Runway Length3200 ft
Runway Width60 ft
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftGrumman AA-5B
Tail NumberN74463
Aircraft CategoryAir
DamageDestroyed
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · O-360-A4K · Reciprocating · 180
Seats4
People & Injuries
Injury Summary2 injuries (2 serious injuries)
Fatal0
Serious2
Minor0
Uninjured0
Total2
Crew 1Age 46 · Second Class
Conditions
ConditionsVMC
LightDaylight
WindCalm
Visibility20 sm
CeilingNone
Temperature / Dew Point0 C / 0 C
Altimeter30.00 inHg
Observation Time19:45
Weather SourceWFAC