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NTSB Report
December 29, 1989 · Champion 7ECA · N7615S
Tanana, AK
Overview
Report Status
Probable Cause
Event Type
Accident
Date
December 29, 1989
Injury Outcomes
No injuries (1 uninjured)
Location
Tanana, AK
Aircraft
Champion 7ECA
Tail Number
N7615S
Operator
Quinn Michael H
Injuries
None
Aircraft Damage
Substantial
NTSB Number
ANC90LA023
THE PILOT REPORTED THAT HE WAS USING HIS AIRPLANE TO TEND HIS TRAP LINE. SHORTLY AFTER TOUCH DOWN ON A FROZEN, SNOW COVERED LAKE, THE RIGHT MAIN GEAR AXLE BOLT (HOLDING THE SKI TO THE GEAR LEG) FAILED. THE SKI THEN SEPARATED FROM THE GEAR LEG AND THE AIRPLANE WAS FURTHER DAMAGED BEFORE IT CAME TO REST. THE PILOT BELIEVED THE AXLE BOLT HAD FAILED DUE TO THE CUMULATIVE EFFECTS OF CONSISTENTLY LANDING ON ROUGH TERRAIN. ACCORDING TO HIM, THERE WAS NO INHERENT FLAW OR DESIGN PROBLEM WITH THE AXLE BOLT.
NTSB Probable Cause
FAILURE OF THE RIGHT MAIN GEAR AXLE BOLT.
Full Narrative
THE PILOT REPORTED THAT HE WAS USING HIS AIRPLANE TO TEND HIS TRAP LINE. SHORTLY AFTER TOUCH DOWN ON A FROZEN, SNOW COVERED LAKE, THE RIGHT MAIN GEAR AXLE BOLT (HOLDING THE SKI TO THE GEAR LEG) FAILED. THE SKI THEN SEPARATED FROM THE GEAR LEG AND THE AIRPLANE WAS FURTHER DAMAGED BEFORE IT CAME TO REST. THE PILOT BELIEVED THE AXLE BOLT HAD FAILED DUE TO THE CUMULATIVE EFFECTS OF CONSISTENTLY LANDING ON ROUGH TERRAIN. ACCORDING TO HIM, THERE WAS NO INHERENT FLAW OR DESIGN PROBLEM WITH THE AXLE BOLT.
Flight
Event TypeAccident
Event Time08:30 AKST
Nearest Airport0nm N
Runway0
Flight Plan FiledVFR
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftChampion 7ECA
Tail NumberN7615S
Aircraft CategoryAir
DamageSubstantial
OperatorQuinn Michael H
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · O-235-C1 · Reciprocating · 115
Seats2
People & Injuries
Injury SummaryNo injuries (1 uninjured)
Fatal0
Serious0
Minor0
Uninjured1
Total1
Crew 1Age 32 · Second Class
Conditions
ConditionsVMC
LightDaylight
Wind260° @ 6 kt
Visibility30 sm
CeilingBroken clouds 12000 ft
Temperature / Dew Point0 C / 0 C
Altimeter0
Weather SourcePILO