Aircraft Overruns Grass Runway During Aborted Takeoff Attempt

Casualties unknown • Opheim, MT, US

A pilot attempting an aerial application takeoff on a grass airstrip lost control of the aircraft after using improper flap settings, resulting in a runway overrun.

What happened

In preparation for a local aerial application flight, the pilot loaded a Cessna (type not specified) with fuel and herbicide. The takeoff was initiated on a 2,675-foot grass airstrip, heading north following the determination of light southwest winds. After traveling approximately two-thirds of the runway length without achieving flight, the pilot decided to abort the takeoff.

The pilot then attempted a second takeoff from the opposite end of the runway, heading south. During this second attempt, the pilot selected full flaps for the takeoff. As the aircraft reached the halfway point of the runway, the tail lifted, and the airplane began bouncing along the remaining length of the strip. The aircraft subsequently overran the runway and struck a berm, causing substantial damage to the tail section. There were no injuries reported.

The investigation

Investigators found the flaps in the fully extended 20-degree position at the accident site. According to the airplane flight manual, the flaps should not be set beyond 10 degrees for a short field takeoff. Additionally, an inspector determined that the operator did not possess a valid agriculture operating certificate at the time of the accident.

Probable cause

The pilot's use of full flaps (20 degrees) during a short field takeoff, which exceeded the manual's 10-degree limit, leading to the aircraft tail lifting and bouncing during the takeoff attempt.

Frequently asked questions

What happened in the 1996-06-29 Cessna A188B accident near Opheim, MT?

A pilot attempting an aerial application takeoff on a grass airstrip lost control of the aircraft after using improper flap settings, resulting in a runway overrun.

What aircraft was involved and where did it happen?

The accident on 1996-06-29 involved a Cessna A188B, registration N731ED, at Opheim, MT.

What was the probable cause of the accident?

The pilot's use of full flaps (20 degrees) during a short field takeoff, which exceeded the manual's 10-degree limit, leading to the aircraft tail lifting and bouncing during the takeoff attempt.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001208X06126. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.

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