No fatalities

6 Jul 2011: AVIAT AIRCRAFT INC A-1B — CLINE RICHARD L — Palmer, AK

Palmer, AK, United States

On 6 Jul 2011, an AVIAT AIRCRAFT INC A-1B operated by CLINE RICHARD L was involved in an aviation accident near Palmer, AK. No fatalities were reported. Investigators recorded the probable cause as: The pilot's decision to fly at a low altitude in mountainous terrain and weather conditions conducive to downdrafts. This summary draws on records from NTSB; 12 related events involving the same aircraft type or operator are linked below.

SourcesNTSBPrimary reportUpdated 1778583330Data APIEditorial standards

A pilot reported that while showing a passenger sheep in mountainous terrain, a strong downdraft caused the airplane to descend despite full engine power, resulting in substantial damage after impacting rock-covered terrain.

Incident Summary

The pilot of an airplane reported that while flying in mountainous terrain and showing a passenger some sheep, the aircraft passed near an area of steep terrain. At that moment, a strong downdraft was encountered, causing the airplane to begin descending. The pilot immediately added full engine power in an attempt to stop the descent, but the airplane continued to lose altitude. It subsequently impacted an area of down sloping terrain covered with rocks.

Aircraft Damage

The impact resulted in substantial damage to the airplane's fuselage, wings, and empennage. The pilot indicated that there were no preaccident mechanical problems with the airplane.

Pilot Account

According to the pilot, the purpose of the flight was to show a passenger some sheep in the mountainous area. The terrain in the vicinity was steep, and the downdraft encountered was strong enough to overcome the full engine power applied. The descent was not arrested, leading to the collision with the rock-covered slope.

Contributing factors

Causes

Pilot

Other contributing factors

Contributed to outcomeCapability exceeded