Casualties unknown

Pilot Collides Windsock Mast During Taxi After Aircraft Wash (N73403)

San Carlos, CA, US

On October 16, 1990, a Cessna 172 (registration N73403) operated by United Co-op Flying Club Inc. was involved in an aviation accident near San Carlos, CA. Investigators recorded the probable cause as: The pilot's failure to stay on the taxiway centerline during taxi operations, which resulted in the right wing striking a windsock mast. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive; 1 related events involving the same aircraft type or operator are linked below.

Sourcesthe U.S. National Transportation Safety Board (NTSB) historical archivePrimary reportUpdated 2026-06-22Data APIEditorial standards

A pilot taxiing to run up the aircraft after washing it failed to stay on the centerline, causing the right wing to strike a windsock mast.

What happened

The accident occurred while the pilot was preparing an aircraft for post-wash maintenance. The airplane had been washed prior to departure on the day of the incident. The pilot's intention was to fly the aircraft in a local pattern to dry the airframe, which would allow for subsequent waxing.

While taxiing toward the run-up area, the pilot failed to maintain position along the taxiway centerline. As a result, the right wing of the airplane collided with a windsock mast.

Probable cause

The pilot's failure to stay on the taxiway centerline during taxi operations, which resulted in the right wing striking a windsock mast.

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Frequently asked questions

What happened in the 16 Oct 1990 Cessna 172 accident near San Carlos, CA?

A pilot taxiing to run up the aircraft after washing it failed to stay on the centerline, causing the right wing to strike a windsock mast.

What aircraft was involved and where did it happen?

The accident on 16 Oct 1990 involved a Cessna 172, registration N73403, operated by United Co-op Flying Club Inc., at San Carlos, CA.

What was the probable cause of the accident?

The pilot's failure to stay on the taxiway centerline during taxi operations, which resulted in the right wing striking a windsock mast.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001212X24489. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.