No fatalities

Runway excursion during takeoff due to loss of directional control (N1729D)

EL Cajon, CA, US

On November 28, 1996, a Cessna 170A (registration N1729D) operated by Dennis A. Treadwell was involved in an aviation accident near EL Cajon, CA. No fatalities were reported. Investigators recorded the probable cause as: The pilot's failure to maintain directional control during takeoff, attributed to his lack of experience with conventional gear aircraft. 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 2026-06-21Data APIEditorial standards

A light aircraft ground looped to the left during the initial phase of takeoff on runway 27L, resulting in damage to the right wing. The pilot had limited experience with conventional gear aircraft.

What happened

The pilot initiated a takeoff roll on runway 27L under calm wind conditions. During the early stages of acceleration, the aircraft deviated sharply to the left, causing it to ground loop. This loss of directional control resulted in damage to the right wing.

The investigation

Review of the pilot's flight records indicated that he possessed very few hours of experience flying aircraft with conventional landing gear configuration. This lack of specific experience was a significant factor in the incident.

Probable cause

The pilot's failure to maintain directional control during takeoff, attributed to his lack of experience with conventional gear aircraft.

Frequently asked questions

What happened in the 28 Nov 1996 Cessna 170A accident near EL Cajon, CA?

A light aircraft ground looped to the left during the initial phase of takeoff on runway 27L, resulting in damage to the right wing. The pilot had limited experience with conventional gear aircraft.

Were there any fatalities in the 28 Nov 1996 Cessna 170A accident?

No fatalities were recorded in this accident.

What aircraft was involved and where did it happen?

The accident on 28 Nov 1996 involved a Cessna 170A, registration N1729D, operated by Dennis A. Treadwell, at EL Cajon, CA.

What was the probable cause of the accident?

The pilot's failure to maintain directional control during takeoff, attributed to his lack of experience with conventional gear aircraft.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001208X07080. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.