Single-engine aircraft impact in mountainous terrain

1 fatality • Lester, United States of America • Flight

An aircraft crashed into a mountainside during its initial climb phase after experiencing a sudden, severe deviation from its assigned flight path.

What happened

Following takeoff, the aircraft entered airway V-2 and maintained a standard climb profile. Upon reaching an altitude of 8,300 feet, which was below the assigned 9,000 feet, the aircraft was traveling at 128 knots on a magnetic heading of approximately 110°. Radar data indicates that the aircraft then executed a sudden 30-degree left turn. Although the aircraft appeared to stabilize momentarily, the pilot's radio communications remained calm and showed no signs of distress during this period.

Shortly after this initial deviation, the aircraft's heading shifted more than 90 degrees to the left, turning toward the north. This maneuver was accompanied by a rapid descent reaching a maximum rate of 6,750 feet per minute. The aircraft eventually struck a mountainside in a steep, nose-low, and left-wing-down attitude. The impact site was located roughly 1 nautical mile southwest of the final radar contact, with debris scattered in a pattern nearly parallel to airway V-2. The pilot, who was the only person on board, was killed in the accident.

Findings

Post-accident inspections of the engines, propellers, and governors revealed no signs of mechanical failure or malfunction. While the left propeller showed evidence of low power at the moment of impact, no significant turbulence or icing conditions were identified as contributing factors. The investigation focused on the abrupt heading change and subsequent rapid descent that led to the terrain impact.

Probable cause

The aircraft experienced a sudden and extreme deviation from its flight path, resulting in a high-rate descent into mountainous terrain.

Frequently asked questions

What happened in the 1992-12-25 Rockwell Grand Commander 680 accident near Lester, United States of America?

An aircraft crashed into a mountainside during its initial climb phase after experiencing a sudden, severe deviation from its assigned flight path.

Were there any fatalities in the 1992-12-25 Rockwell Grand Commander 680 accident?

The accident was fatal, resulting in 1 fatality.

What aircraft was involved and where did it happen?

The accident on 1992-12-25 involved a Rockwell Grand Commander 680, registration N111MN, operated by Corporate Air - USA, at Lester, United States of America.

What was the probable cause of the accident?

The aircraft experienced a sudden and extreme deviation from its flight path, resulting in a high-rate descent into mountainous terrain.

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