Casualties unknown

Small Aircraft Inverted After Ground Loop on Takeoff (N999MP)

Deming, NM, US

On September 29, 2001, a Piper PA-18-150 (registration N999MP) was involved in an aviation accident near Deming, NM. Investigators recorded the probable cause as: The pilot's failure to maintain directional control during takeoff in gusty wind conditions, which resulted in a ground loop and runway excursion. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.

Sourcesthe U.S. National Transportation Safety Board (NTSB) historical archivePrimary reportUpdated 2026-06-10Data APIEditorial standards

A light aircraft inverted after a gust of wind lifted its right wing during takeoff, causing a ground loop and runway excursion at an airfield with moderate crosswinds.

What happened

The pilot reported that the accident occurred while he was conducting a takeoff roll on runway 08. During the acceleration phase, a gust of wind lifted the right wing of the aircraft. This aerodynamic disturbance caused the left wing to strike the pavement, initiating a ground loop to the left. The airplane subsequently exited the left side of the runway and came to rest in an inverted position.

The investigation

A manager for the fixed base operator provided weather data for the time of the accident. The wind was blowing from 170 degrees at 15 knots, with gusts ranging from 20 to 25 knots. These conditions likely contributed to the loss of directional control during the critical takeoff phase.

Findings

The pilot stated that he had accumulated 9 hours of flight time on the day of the accident. The combination of moderate crosswind and gusts during takeoff led to the structural upset and subsequent inversion of the aircraft.

Probable cause

The pilot's failure to maintain directional control during takeoff in gusty wind conditions, which resulted in a ground loop and runway excursion.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20011005X02046. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.