No fatalities

Cessna 172 Forced Landing After Canyon Encounter Results in Substantial Damage

Bountiful, UT, United States

On June 5, 2010, a CESSNA 172H H operated by Amberdawn Mock was involved in an aviation accident near Bountiful, UT. No fatalities were reported. Investigators recorded the probable cause as: The pilot’s failure to maintain clearance from terrain. Contributing to the accident was the high density altitude. This summary draws on records from NTSB; 12 related events involving the same aircraft type or operator are linked below.

SourcesNTSBPrimary reportUpdated 2026-08-03Data APIEditorial standards

A pilot flying a Cessna 172H into a canyon at 6,100 ft lost airspeed and altitude during ascent, leading to a forced landing in trees at the bottom of a ravine, causing substantial damage to the wings, fuselage, and empennage.

Accident Details

A pilot initiated flight into a canyon at an elevation of 6,100 feet with the intention of flying over it. During the climb, the airplane began losing airspeed and altitude. The pilot attempted a turn but could not execute it due to insufficient airspeed, which would have resulted in a stall. Consequently, the pilot performed a forced landing into trees at the bottom of a ravine. The airplane sustained substantial damage to its wings, fuselage, and empennage.

Pilot Report

The pilot reported no mechanical failures or malfunctions with the airframe or engine at the time of the accident. In a written statement, the pilot noted that the accident could have been prevented by circling over a nearby city until sufficient altitude was gained to fly over the canyon.

Environmental Conditions

The calculated density altitude at 6,100 feet, with an altimeter setting of 30.14 and a temperature of 22 degrees Celsius, was 8,238 feet. The published maximum operating density altitude for the C-172H is 13,100 feet. The pilot did not indicate whether density altitude was a factor in the loss of performance.

Contributing factors

Causes

Airspeed — Not attained/maintainedAltitude — Not attained/maintainedPilot

Other contributing factors

Effect on equipment

Frequently asked questions

What happened in the 5 Jun 2010 CESSNA 172H H accident near Bountiful, UT?

A pilot flying a Cessna 172H into a canyon at 6,100 ft lost airspeed and altitude during ascent, leading to a forced landing in trees at the bottom of a ravine, causing substantial damage to the wings, fuselage, and empennage.

Were there any fatalities in the 5 Jun 2010 CESSNA 172H H accident?

No fatalities were recorded in this accident.

What aircraft was involved and where did it happen?

The accident on 5 Jun 2010 involved a CESSNA 172H H, operated by Amberdawn Mock, at Bountiful, UT.

What was the probable cause of the accident?

The pilot’s failure to maintain clearance from terrain. Contributing to the accident was the high density altitude.