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NTSB Report
November 9, 1989 · Cessna 310I · N145Y
Provo, UT
Overview
Report Status
Probable Cause
Event Type
Accident
Date
November 9, 1989
Injury Outcomes
2 injuries (2 fatalities)
Location
Provo, UT
Aircraft
Cessna 310I
Tail Number
N145Y
Operator
Trojan Robert W
Injuries
Fatal
Aircraft Damage
Destroyed
NTSB Number
DEN90FA021
THE PLTS OF CESSNA 310, N145Y, AND BEECH J35 (BONANZA), N4258B, PREPLANNED A FLT FOR THE PURPOSE OF MAKING A VIDEO WHILE FLYING AS A FLT OF 2 ACFT. DRG FLT, THE BONANZA PLT ASSUMED A LEAD POSITION WITH THE CESSNA IN A LOOSE ECHELON FORMATION. THEY PROCEEDED OVER UTAH LAKE AT LOW ALT. THE WIND WAS LIGHT & THE WATER IN THE LAKE WAS CALM. SUBSEQUENTLY, WHILE FLYING AT LOW ALT OVER THE LAKE, THE CESSNA HIT THE WATER. THE VIDEO FILM SHOWED THAT JUST PRIOR TO WATER IMPACT, THE BONANZA WAS TO THE RIGHT SIDE OF THE CESSNA & SLIGHTLY HIGHER. AFTER THE ACDNT, THE CESSNA SANK IN 12 FT OF WATER. BOTH OCCUPANTS OF THE CESSNA SUFFERED BLUNT FORCE TRAUMA ASSOCIATED WITH IMPACT; HOWEVER, THE MED EXAMINER RPRTD THEIR DEATHS WERE DUE TO DROWNING.
NTSB Probable Cause
THE CESSNA PILOT MISJUDGE HIS ALTITUDE ABOVE THE WATER. CONTRIBUTING FACTORS WERE: THE PILOT ALLOWING HIS ATTENTION TO BE DIVERTED AND HIS LACK OF VISUAL/DEPTH PERCEPTION OVER THE CALM (GLASSY) WATER.
Full Narrative
THE PLTS OF CESSNA 310, N145Y, AND BEECH J35 (BONANZA), N4258B, PREPLANNED A FLT FOR THE PURPOSE OF MAKING A VIDEO WHILE FLYING AS A FLT OF 2 ACFT. DRG FLT, THE BONANZA PLT ASSUMED A LEAD POSITION WITH THE CESSNA IN A LOOSE ECHELON FORMATION. THEY PROCEEDED OVER UTAH LAKE AT LOW ALT. THE WIND WAS LIGHT & THE WATER IN THE LAKE WAS CALM. SUBSEQUENTLY, WHILE FLYING AT LOW ALT OVER THE LAKE, THE CESSNA HIT THE WATER. THE VIDEO FILM SHOWED THAT JUST PRIOR TO WATER IMPACT, THE BONANZA WAS TO THE RIGHT SIDE OF THE CESSNA & SLIGHTLY HIGHER. AFTER THE ACDNT, THE CESSNA SANK IN 12 FT OF WATER. BOTH OCCUPANTS OF THE CESSNA SUFFERED BLUNT FORCE TRAUMA ASSOCIATED WITH IMPACT; HOWEVER, THE MED EXAMINER RPRTD THEIR DEATHS WERE DUE TO DROWNING.
Flight
Event TypeAccident
Event Time13:47 MST
Nearest Airport0nm N
Runway0
Runway Length0
Runway Width0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftCessna 310I
Tail NumberN145Y
Aircraft CategoryAir
DamageDestroyed
OperatorTrojan Robert W
Operating RulePart 91
Engines2
Engine TypeReciprocating
Engine DetailsContinental · IO-470-U · Reciprocating · 260
Seats6
People & Injuries
Injury Summary2 injuries (2 fatalities)
Fatal2
Serious0
Minor0
Uninjured0
Total2
Crew 1Age 24 · First Class
Conditions
ConditionsVMC
LightDaylight
Wind260° @ 3 kt
Visibility40 sm
CeilingOvercast 6500 ft
Temperature / Dew Point54 / 30 C
Altimeter30.00 inHg
Observation Time20:51