Pilot executes forced landing after aircraft sags post-takeoff

Casualties unknown • Limon, CO, US

Following takeoff from runway 34 with half flaps and a density altitude of 7,690 feet, the aircraft began to sag. The pilot performed a forced landing in a field to avoid a ditch.

What happened

The flight originated from an airport where the pilot elected to use one notch of flaps, commonly referred to as half flaps, for the takeoff roll on runway 34. At the time of departure, meteorological data indicated a wind direction of 160 degrees at a speed of 6 knots. As the aircraft climbed and passed over the departure end of the runway, it exhibited a noticeable loss of lift, described by the pilot as beginning to sag.

Recognizing the inability to maintain altitude or continue the climb, the pilot initiated an emergency procedure. The objective was to avoid a ditch located in the vicinity. To achieve this, the pilot intentionally forced the aircraft onto the ground in an adjacent field. During this maneuver, the pilot crossed the controls to manage the descent and impact.

Findings

Post-accident analysis revealed that the density altitude at the time of the event was computed to be 7,690 feet mean sea level. This high density altitude likely contributed to the reduced performance of the aircraft during the critical climb phase after takeoff.

Probable cause

The pilot's failure to maintain adequate airspeed during takeoff in high density altitude conditions, resulting in a loss of control and forced landing.

Frequently asked questions

What happened in the 1999-07-24 Piper PA-22-150 accident near Limon, CO?

Following takeoff from runway 34 with half flaps and a density altitude of 7,690 feet, the aircraft began to sag. The pilot performed a forced landing in a field to avoid a ditch.

What aircraft was involved and where did it happen?

The accident on 1999-07-24 involved a Piper PA-22-150, registration N4540A, at Limon, CO.

What was the probable cause of the accident?

The pilot's failure to maintain adequate airspeed during takeoff in high density altitude conditions, resulting in a loss of control and forced landing.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001212X19251. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.

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