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NTSB Report
May 10, 1989 · Cessna C-402 · N966JW
Tatitlek, AK
Overview
Report Status
Probable Cause
Event Type
Accident
Date
May 10, 1989
Injury Outcomes
No injuries (5 uninjured)
Location
Tatitlek, AK
Aircraft
Cessna C-402
Tail Number
N966JW
Operator
Wilburs
Injuries
None
Aircraft Damage
Substantial
NTSB Number
ANC89FA070
THE PILOT-IN-COMMAND TOUCHED DOWN ON THE GRAVEL RUNWAY AND BEGAN TO APPLY BRAKES. THE AIRPLANE BEGAN TO VEER TO THE LEFT AND THE PILOT RELEASED THE BRAKES AND USED ASYMMETRIC POWER AND BRAKING, BUT THE AIRPLANE STILL LEFT THE RUNWAY ABOUT MIDWAY DOWN THE RUNWAY. SUBSEQUENT EXAMINATION REVEALED THAT A SMALL WASHER PLACED BENEATH THE BOLT HEAD, WHICH HOLDS THE UPPER AND LOWER SCISSORS ASSEMBLY TOGETHER, HAD PULLED THROUGH ON THE LEFT MAIN GEAR ALLOWING THE LOWER HALF OF THE MAIN GEAR TO PIVOT FREELY.
NTSB Probable Cause
INSTALLATION OF THE IMPROPER WASHER ON THE SCISSORS ASSEMBLY OF THE LEFT MAIN LANDING GEAR. THE EXTRA FORCES ENCOUNTEREDON A GRAVEL RUNWAY WERE SUFFICIENT TO PULL THE BUSHING, WASHER, AND BOLT THROUGH THE SCISSORS ASSEMBLY AND ALLOWING THE LOWER HALF TO PIVOT FREELY.
Full Narrative
THE PILOT-IN-COMMAND TOUCHED DOWN ON THE GRAVEL RUNWAY AND BEGAN TO APPLY BRAKES. THE AIRPLANE BEGAN TO VEER TO THE LEFT AND THE PILOT RELEASED THE BRAKES AND USED ASYMMETRIC POWER AND BRAKING, BUT THE AIRPLANE STILL LEFT THE RUNWAY ABOUT MIDWAY DOWN THE RUNWAY. SUBSEQUENT EXAMINATION REVEALED THAT A SMALL WASHER PLACED BENEATH THE BOLT HEAD, WHICH HOLDS THE UPPER AND LOWER SCISSORS ASSEMBLY TOGETHER, HAD PULLED THROUGH ON THE LEFT MAIN GEAR ALLOWING THE LOWER HALF OF THE MAIN GEAR TO PIVOT FREELY.
Flight
Event TypeAccident
Event Time14:55 AKDT
Nearest AirportTATITLEK (0nm N)
Runway12
Runway Length2200 ft
Runway Width95 ft
Flight Plan FiledIFR
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftCessna C-402
Tail NumberN966JW
Aircraft CategoryAir
DamageSubstantial
OperatorWilburs
Operating RulePart 135
Engines2
Engine TypeReciprocating
Engine DetailsContinental · IO-520-E · Reciprocating · 300
Seats10
People & Injuries
Injury SummaryNo injuries (5 uninjured)
Fatal0
Serious0
Minor0
Uninjured5
Total5
Crew 1Age 43 · First Class
Conditions
ConditionsVMC
LightDaylight
Wind130° @ 7 kt
CeilingNone
Temperature / Dew Point0 C / 0 C
Altimeter29.00 inHg
Weather SourcePILO