NTSB Identification: DEN88FA193.
The docket is stored on NTSB microfiche number 37331.
Accident occurred Saturday, August 27, 1988 in JACKSON HOLE, WY
Probable Cause Approval Date: 12/06/1989
Aircraft: MOONEY M20F, registration: N9528M
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 PVT PLT OBTAINED HIS INSTRUMENT RATING 14 DAYS PRIOR TO THE ACCIDENT. 12 HRS OF ACTUAL INSTRUMENT FLT TIME WAS LOGGED IN MARCH OF 1987. THE REMAINING INSTRUMENT FLT TIME WAS SIMULATED. VISIBILITY IN THE JACKSON HOLE AREA WAS REDUCED BY SMOKE. THE PLT REPORTED HE WAS CLIMBING THRU 11,000 FT FOR 14,000 FT. THE ACFT WRECKAGE WAS FOUND AT 9,000 FT. THE ACFT HAD STRUCK TWO TALL TREES AND FELL VERTICALLY TO THE GND. THE ACFT WEIGHT WAS CALCULATED TO BE NEAR MAX GROSS AND THE CG WAS DETERMINED TO BE BEYOND THE AFT LIMIT. THE PLT'S TOTAL INSTRUMENT FLT TIME WAS 42 HOURS. THE ACFT OWNERS MANUAL CONTAINS A WARNING WHICH STATE 'UP TO 2,000 FT OF ALTITUDE MAY BE LOST IN A ONE-TURN SPIN AND RECOVERY...THE RATE OF ROTATION DURING THE FIRST PORTION OF THE SPIN IS QUITE RAPID AND THE OCCUPANTS OF THE AIRCRAFT WILL LIKELY BECOME DISORIENTED.'

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

REMEDIAL ACTION..INADEQUATE..PILOT IN COMMAND

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

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

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

STALL/SPIN..INADVERTENT..PILOT IN COMMAND



Contributing Factors

AIRCRAFT WEIGHT AND BALANCE..IMPROPER..PILOT IN COMMAND


Contributing Factors

WEATHER CONDITION..HAZE/SMOKE


Contributing Factors

LACK OF RECENT INSTRUMENT TIME..PILOT IN COMMAND


Contributing Factors

SPATIAL DISORIENTATION..PILOT IN COMMAND

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