NTSB Identification: DEN88FA110.
The docket is stored on NTSB microfiche number 36657.
Accident occurred Thursday, May 19, 1988 in HEBER CITY, UT
Probable Cause Approval Date: 07/21/1989
Aircraft: CESSNA 152, registration: N25934
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 CFI AND STUDENT PLT WERE ON A ROUND-ROBIN CROSS-COUNTRY FLT. A WITNESS NEAR THE ACCIDENT SITE SAID HE SAW AN AIRPLANE FLYING 'UP A CANYON QUITE SLOW AND LOW'. THE AIRPLANE WAS REPORTED OVERDUE AND FOUND THE NEXT DAY IN A 'BOX CANYON' AT THE 8,500 FOOT LEVEL. THE PORTION OF THE CANYON WHERE THE WRECKAGE WAS LOCATED IS APPROXIMATELY 1/4 MILE WIDE. THE AIRPLANE IMPACTED TREES AND STEEP TERRAIN IN A NEAR VERTICAL, NOSE LOW, RT WING LOW ATTITUDE. NO EVIDENCE OF A MECHANICAL MALFUNCTION OR FAILURE OF THE AIRPLANE, ENGINE OR PROPELLER WAS FOUND. THE DENSITY ALTITUDE WAS CALCULATED TO BE 10,278 FEET. THE TERRAIN IN THE VICINITY OF THE ACCIDENT SITE RISES TO OVER 11,000 FEET.
The National Transportation Safety Board determines the probable cause(s) of this accident to be:IN-FLIGHT PLANNING/DECISION..IMPROPER..PILOT IN COMMAND(CFI)
The National Transportation Safety Board determines the probable cause(s) of this accident to be:AIRSPEED..NOT MAINTAINED..PILOT IN COMMAND(CFI)
WEATHER CONDITION..HIGH DENSITY ALTITUDE
TERRAIN CONDITION..BLIND/BOX CANYON
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