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NTSB Report
September 18, 1987 · Evans Aircraft VP-2 · N84772
Cedar Valley, UT
Overview
Report Status
Preliminary report
Event Type
Accident
Date
September 18, 1987
Injury Outcomes
1 injury (1 serious injury)
Location
Cedar Valley, UT
Aircraft
Evans Aircraft VP-2
Tail Number
N84772
Operator
Harold Wirth
Injuries
Serious
Aircraft Damage
Destroyed
NTSB Number
DEN87DTM01
THE ACFT WAS FLOWN BY TWO DIFFERENT PLTS WHO COMPLAINED OF STIFF AILERONS. THE AILERON SYSTEM WAS EXAMINED BUT NO DEFICIENCIES WERE NOTED. A THIRD PLT THEN TOOK OFF AND BEGAN A LT TURN AT ABOUT 75 TO 100 FT AGL. WHEN HE ATTEMPTED TO RETURN TO WINGS LEVEL HE WAS UNABLE TO ROLL TO THE RT. THE LT BANK THEN INCREASED AND THE ACFT COLLIDED WITH THE GROUND IN A LT WING LOW, NOSE LOW ATTITUDE AND CARTWHEELED. EXAMINATION OF THE INBOARD AILERON PULLEY BLOCK ON THE LT WING REVEALED THAT ADHESIVE USED TO AFFIX THE BLOCK TO THE SUPPORTING STRUCTURE HAD SEEPED DOWN TO THE OUTSIDE OF THE PULLEY AND FORMED A BOND BETWEEN THE PULLEY AND THE STRUCTURE. THE PULLEY ALSO HAD A GROOVE WORN IN THE PULLEY CHANNEL CONSISTENT WITH LACK OF PULLEY ROTATION.
Full Narrative
THE ACFT WAS FLOWN BY TWO DIFFERENT PLTS WHO COMPLAINED OF STIFF AILERONS. THE AILERON SYSTEM WAS EXAMINED BUT NO DEFICIENCIES WERE NOTED. A THIRD PLT THEN TOOK OFF AND BEGAN A LT TURN AT ABOUT 75 TO 100 FT AGL. WHEN HE ATTEMPTED TO RETURN TO WINGS LEVEL HE WAS UNABLE TO ROLL TO THE RT. THE LT BANK THEN INCREASED AND THE ACFT COLLIDED WITH THE GROUND IN A LT WING LOW, NOSE LOW ATTITUDE AND CARTWHEELED. EXAMINATION OF THE INBOARD AILERON PULLEY BLOCK ON THE LT WING REVEALED THAT ADHESIVE USED TO AFFIX THE BLOCK TO THE SUPPORTING STRUCTURE HAD SEEPED DOWN TO THE OUTSIDE OF THE PULLEY AND FORMED A BOND BETWEEN THE PULLEY AND THE STRUCTURE. THE PULLEY ALSO HAD A GROOVE WORN IN THE PULLEY CHANNEL CONSISTENT WITH LACK OF PULLEY ROTATION.
Flight
Event TypeAccident
Event Time15:15 MDT
Nearest Airport0nm N
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftEvans Aircraft VP-2
Tail NumberN84772
Aircraft CategoryAir
DamageDestroyed
OperatorHarold Wirth
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsContinental · A75 · Reciprocating · 65
Seats1
People & Injuries
Injury Summary1 injury (1 serious injury)
Fatal0
Serious1
Minor0
Uninjured0
Total1
Crew 1Age 44 · None
Conditions
ConditionsVMC
LightDaylight
Wind40° @ 10 kt
Visibility30 sm
CeilingNone
Temperature / Dew Point0 C / 0 C
Altimeter0
Weather SourcePILO