1 fatality

Aircraft Collides with Trees After Encountering Downdraft in Mountainous Terrain; Pilot Killed (N7205L)

Paonia, United States of AmericaLanding (descent or approach)

On September 28, 1984, a Piper PA-31-310 Navajo (registration N7205L) operated by Aero Services - USA was involved in an aviation accident near Paonia, United States of America during landing or approach. One person was killed. Investigators recorded the probable cause as: Occurrence #1: in flight collision with object (trees) during maneuvering due to downdraft, pilot not maintaining proper altitude, and pilot not attaining proper climb rate. Occurrence #2: loss of control in flight. This summary draws on records from the Bureau of Aircraft Accidents Archives (B3A); 1 related events involving the same aircraft type or operator are linked below.

Sourcesthe Bureau of Aircraft Accidents Archives (B3A)Primary report: the U.S. National Transportation Safety Board (NTSB) historical archiveUpdated 2026-07-04Data APIEditorial standards

A pilot was killed when the aircraft, flying at low altitude over mountainous terrain, encountered a downdraft, approached a stall, and collided with trees.

Accident Overview

The accident occurred while the aircraft was in flight at a very low altitude over mountainous terrain. As the aircraft neared a ridge crest, it began to buffet, indicating an approach to aerodynamic stall, and subsequently encountered a downslope wind condition (downdraft). The combination of the stall proximity and the downdraft forced the aircraft into trees. The pilot, who was the sole occupant, was killed.

Accident Details

The aircraft was flying over mountainous terrain at a very low altitude. As it approached the crest of a ridge, the aircraft experienced buffeting, a sign of an approaching stall. Simultaneously, the aircraft encountered a downslope wind condition, commonly referred to as a downdraft. The combination of the stall condition and the downdraft pushed the aircraft downward into trees. The collision with the trees resulted in fatal injuries to the pilot, who was the only person on board.

Official Findings

The official investigation identified three occurrences. The first occurrence was an in-flight collision with an object (trees) during maneuvering. Contributing findings included the presence of a downdraft, and the pilot's failure to maintain proper altitude and proper climb rate. The second occurrence was a loss of control in flight. The third occurrence was an in-flight collision with terrain/water during an uncontrolled descent, with the terrain being mountainous/hilly.

Probable cause

Occurrence #1: in flight collision with object (trees) during maneuvering due to downdraft, pilot not maintaining proper altitude, and pilot not attaining proper climb rate. Occurrence #2: loss of control in flight. Occurrence #3: in flight collision with terrain/water during uncontrolled descent due to mountainous/hilly terrain.

Frequently asked questions

What happened in the 28 Sept 1984 Piper PA-31-310 Navajo accident near Paonia, United States of America?

A pilot was killed when the aircraft, flying at low altitude over mountainous terrain, encountered a downdraft, approached a stall, and collided with trees.

Were there any fatalities in the 28 Sept 1984 Piper PA-31-310 Navajo accident?

The accident was fatal, resulting in 1 fatality.

What aircraft was involved and where did it happen?

The accident on 28 Sept 1984 involved a Piper PA-31-310 Navajo, registration N7205L, operated by Aero Services - USA, at Paonia, United States of America.

What was the probable cause of the accident?

Occurrence #1: in flight collision with object (trees) during maneuvering due to downdraft, pilot not maintaining proper altitude, and pilot not attaining proper climb rate. Occurrence #2: loss of control in flight. Occurrence #3: in flight collision with terrain/water during uncontrolled descent due to…