NTSB Identification: DEN83LA082.
The docket is stored on NTSB microfiche number 21131.
Nonscheduled 14 CFR
Accident occurred Monday, March 21, 1983 in HEBER CITY, UT
Aircraft: AMERICAN AA-5B, registration: N4520V
Injuries: 1 Uninjured.

NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.

AFTER TAKING OFF AT HEBER CITY, UT, THE PLT TURNED TO A 090 DEG HEADING & BEGAN A CLIMB WITH FULL THROTTLE, MIXTURE FULL RICH, 80 TO 90 KIAS & APRX 500 FPM RATE OF CLIMB. AT APRX 6500 FT MSL, HE ALTERED THE COURSE TO 110 TO 115 DEG TO PROVIDE BETTER TERRAIN CLEARANCE, OVER A SLIGHT VALLEY FORMED BY CREEK DRAINAGE. AT THAT POINT, THE CLEARANCE WAS REPORTEDLY ABOUT 1000 FT. AS THE CLIMB CONTINUED, THE PLT NOTICED THAT THE TERRAIN WAS GRADUALLY GETTING CLOSER. AS HE NEARED THE TOP, HE SUDDENLY REALIZED THAT THE ACFT MIGHT NOT BE ABLE TO MAKE IT OVER. A 180 DEG TURN WAS STARTED. HOWEVER, AS A LEFT BANK WAS ESTABLISHED FOR THE TURN, THE ACFT FELT MUSHY & STARTED TO LOSE ALT RAPIDLY. THE PLT ROLLED THE WINGS LEVEL & PULLED BACK ON THE YOKE WHEN GROUND CONTACT WAS POSSIBLE. HOWEVER, THE DESCENT CONTINUED & THE ACFT CRASHED ON A TREELESS, SNOW CVRD SLOPE AT 9300 FT. THE PLT SUGGESTED CARBON MONOXIDE MIGHT EXPLAIN HIS INDECISIVENESS, BUT AN EXAM OF THE ENG & EXHAUST SYS REVEALED NO PREIMPACT MALFUNCTION OR FAILURE.

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

PROPER CLIMB RATE..NOT POSSIBLE..PILOT IN COMMAND

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

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

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

AIRSPEED..NOT MAINTAINED..PILOT IN COMMAND


Contributing Factors

TERRAIN CONDITION..HIGH TERRAIN


Contributing Factors

TERRAIN CONDITION..MOUNTAINOUS/HILLY


Contributing Factors

TERRAIN CONDITION..SNOW COVERED


Contributing Factors

WEATHER CONDITION..HIGH DENSITY ALTITUDE


Contributing Factors

STALL..INADVERTENT..PILOT IN COMMAND

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