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NTSB Report
June 2, 1983 · Aero Commander 680FL · N271VT
Monticello, UT
Overview
Report Status
Preliminary report
Event Type
Accident
Date
June 2, 1983
Injury Outcomes
2 injuries (2 fatalities)
Location
Monticello, UT
Aircraft
Aero Commander 680FL
Tail Number
N271VT
Injuries
Fatal
Aircraft Damage
Destroyed
NTSB Number
DEN83FA131
THE ACFT CRASHED WHILE DOING MAGNETOMETER SURVEYS AT LOW ALTITUDE. THE RIGHT ENGINE HAD LOST POWER THEN REGAINED IT FOR A SHORT PERIOD AND LOST IT AGAIN. A VIDEOTAPE IN THE ACFT RECORDED THE PLT SAYING, 'I CHANGED THAT # JUST IN TIME.' THE ACFT YAWED AND THE PROPELLER SLOWED AT THE SAME TIME. THE FUEL SELECTOR VALVES WERE FOUND ON THE CENTER TANKS. THE BOOST PUMP SWITCHES WERE FOUND IN THE OFF POSITION. WHEN CHANGING FROM OUTBOARD TO CENTER TANKS THE BOOST PUMPS MUST BE ON OR FUEL STARVATION WILL OCCUR. AS THE ACFT SLOWED THE TAPE REVEALED THAT THE CO-PLT CALLED OUT'DOWN TO 90'. 90 MPH ISVMC. THE ACFT STALLED, SHORTLY AFTER THE ASYMMETRICAL THRUST ROLLED THE ACFT TO THE RIGHT AND INTO THE GROUND.
Full Narrative
THE ACFT CRASHED WHILE DOING MAGNETOMETER SURVEYS AT LOW ALTITUDE. THE RIGHT ENGINE HAD LOST POWER THEN REGAINED IT FOR A SHORT PERIOD AND LOST IT AGAIN. A VIDEOTAPE IN THE ACFT RECORDED THE PLT SAYING, 'I CHANGED THAT # JUST IN TIME.' THE ACFT YAWED AND THE PROPELLER SLOWED AT THE SAME TIME. THE FUEL SELECTOR VALVES WERE FOUND ON THE CENTER TANKS. THE BOOST PUMP SWITCHES WERE FOUND IN THE OFF POSITION. WHEN CHANGING FROM OUTBOARD TO CENTER TANKS THE BOOST PUMPS MUST BE ON OR FUEL STARVATION WILL OCCUR. AS THE ACFT SLOWED THE TAPE REVEALED THAT THE CO-PLT CALLED OUT'DOWN TO 90'. 90 MPH ISVMC. THE ACFT STALLED, SHORTLY AFTER THE ASYMMETRICAL THRUST ROLLED THE ACFT TO THE RIGHT AND INTO THE GROUND.
Flight
Event TypeAccident
Event Time17:23 MDT
Nearest Airport0nm N
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftAero Commander 680FL
Tail NumberN271VT
Aircraft CategoryAir
DamageDestroyed
Operating RulePart 91
Engines2
Engine TypeReciprocating
Engine DetailsLycoming · IGSO-540-B1A · Reciprocating · 380
Seats2
People & Injuries
Injury Summary2 injuries (2 fatalities)
Fatal2
Serious0
Minor0
Uninjured0
Total2
Crew 1Age 47 · First Class
Conditions
ConditionsVMC
LightDaylight
Wind210° @ 12 kt, gusting 20 kt
Visibility50 sm
CeilingBroken clouds 12000 ft
Temperature / Dew Point63 F / 39 C
Altimeter29.00 inHg
Observation Time23:30
Weather SourceWFAC