Casualties unknown

Plane Cartwheels Downslope After Downdraft During Sheep Scouting (N345RB)

Chickaloon, AK, US

On August 1, 1995, a Cessna 172A (registration N345RB) was involved in an aviation accident near Chickaloon, AK. Investigators recorded the probable cause as: THE PILOT'S INADVERTENT ENCOUNTER WITH ADVERSE WEATHER CONDITIONS AND FAILURE TO MAINTAIN SUFFICIENT ALTITUDE/CLEARANCE FROM THE TERRAIN TO COMPENSATE FOR SUCH CONDITIONS. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.

Sourcesthe U.S. National Transportation Safety Board (NTSB) historical archivePrimary reportUpdated 2026-07-04Data APIEditorial standards

A private pilot and passenger scouting for sheep at 5,500 feet encountered a downdraft. The airplane lost altitude and airspeed, and despite full power and a turn, it descended into terrain, cartwheeling downslope to 4,800 feet.

Accident Overview

A certificated private pilot and a passenger were engaged in sheep scouting operations in a remote mountainous area. The aircraft was flying at an altitude of 5,500 feet mean sea level when it encountered a downdraft. The downdraft resulted in a loss of both altitude and airspeed.

Pilot Actions

In response to the deteriorating situation, the pilot applied full power and initiated a turn. Despite these corrective measures, the airplane continued to descend and could not arrest its rate of descent.

Impact and Post-Impact Sequence

The descent persisted until the airplane made contact with the ground. During the initial impact, the left wingtip struck the terrain. The aircraft then cartwheeled downslope, coming to a final rest at an elevation of approximately 4,800 feet.

Aircraft Performance

Performance charts for the specific airplane model indicated that, under the conditions, it should have been capable of a climb rate of 350 feet per minute. The reason for the discrepancy between actual performance and charted capability is not stated.

Weather Conditions

The pilot reported that scattered rain showers were present in the area at the time of the accident. No further weather details were provided.

Frequently asked questions

What happened in the 1 Aug 1995 Cessna 172A accident near Chickaloon, AK?

A private pilot and passenger scouting for sheep at 5,500 feet encountered a downdraft. The airplane lost altitude and airspeed, and despite full power and a turn, it descended into terrain, cartwheeling downslope to 4,800 feet.

What aircraft was involved and where did it happen?

The accident on 1 Aug 1995 involved a Cessna 172A, registration N345RB, at Chickaloon, AK.

What was the probable cause of the accident?

THE PILOT'S INADVERTENT ENCOUNTER WITH ADVERSE WEATHER CONDITIONS AND FAILURE TO MAINTAIN SUFFICIENT ALTITUDE/CLEARANCE FROM THE TERRAIN TO COMPENSATE FOR SUCH CONDITIONS. FACTORS RELATED TO THE ACCIDENT WERE: DOWNDRAFTS, THE PROXIMITY OF MOUNTAINOUS TERRAIN, AND THE PILOT'S INADEQUATE WEATHER EVALUATION.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001207X04121. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.