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Aftermath: In the Region of Reversed Commands

The investigator concluded that the probable cause of the accident was improper soft-field-takeoff technique.

A pilot and his passenger were killed in a 2016 crash after taking off from this grass runway in Indiana. NTSB
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Key Takeaways:

  • A novice pilot crashed a Cessna 150F shortly after takeoff, with the NTSB concluding that improper soft-field-takeoff technique was the probable cause.
  • The pilot likely ascended too early out of ground effect and/or retracted flaps prematurely at insufficient airspeed, despite the strip being smooth.
  • This put the aircraft in the "region of reversed commands," where pulling back on the yoke to climb paradoxically increased drag and caused the airplane to descend into trees.
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In June 2016, a Cessna 150F taking off from a grass strip in Indiana failed to climb, struck trees and crashed, killing both occupants. A single witness, himself a pilot, who was operating a mower, observed parts of the takeoff. He reported that the Cessna had become airborne at midfield, which was normal, and that when it crossed the departure end it was flying at a high angle of attack. He did not expect the airplane to have any trouble clearing the tall trees 1,100 feet from the end of the runway, however, and turned away. When he later saw smoke rising from the woods, he assumed the property owner was burning something, and it did not occur to him there had been an accident until he heard sirens.

The pilot, 44, was a novice. On his application for a third-class medical, four months before the accident, he reported 60 hours of total time, 25 in the previous six months. According to press reports, he had bought the 150 late in 2015.

Peter Garrison

Peter Garrison taught himself to use a slide rule and tin snips, built an airplane in his backyard, and flew it to Japan. He began contributing to FLYING in 1968, and he continues to share his columns, ""Technicalities"" and ""Aftermath,"" with FLYING readers.

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