NTSB Identification: DEN83FA131.
The docket is stored on NTSB microfiche number 23320.
Accident occurred Thursday, June 02, 1983 in MONTICELLO, UT
Aircraft: AERO COMMANDER 680FL, registration: N271VT
Injuries: 2 Fatal.

NTSB investigators either traveled in support of this investigation or conducted a significant amount of investigative work without any travel, and used data obtained from various sources to prepare this aircraft accident report.

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.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

AIRSPEED(VMC)..NOT MAINTAINED..PILOT IN COMMAND

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

STALL..INADVERTENT..PILOT IN COMMAND

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

FUEL TANK SELECTOR POSITION..DELAYED..PILOT IN COMMAND

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

INATTENTIVE..PILOT IN COMMAND

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

FUEL BOOST PUMP SELECTOR POSITION..NOT SELECTED..PILOT IN COMMAND

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

DIVERTED ATTENTION..PILOT IN COMMAND

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

IN-FLIGHT PLANNING/DECISION..IMPROPER..PILOT IN COMMAND


Contributing Factors

FLUID,FUEL..STARVATION

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