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Main Landing Gear Collapse During Landing Roll After Brake Application (N333TB)

Anchorage, AK, US

On July 7, 2005, a Helio H-250 (registration N333TB) was involved in an aviation accident near Anchorage, AK. No fatalities were reported. Investigators recorded the probable cause as: A fracture failure of the main landing gear leg during the landing roll, which resulted in the collapse of the main landing gear. 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 2026-07-04Data APIEditorial standards

During landing roll on a dry asphalt runway, the right main landing gear collapsed after a loud shuddering noise following brake application. Postaccident examination revealed corrosion and overload failure on the gear leg.

Accident Overview

A flight instructor was providing recurrent training to a private pilot during a landing on a dry, paved asphalt runway. After an uneventful touchdown, the second pilot applied the brakes, and a loud shuddering noise was heard. As the landing roll continued, the right main landing gear collapsed, causing the right wing to strike the runway. The airplane sustained structural damage to the right wing.

Postaccident Examination

A postaccident review of the fractured right main landing gear leg assembly was conducted. In the fracture zone, brownish rust-colored deposits were observed covering approximately one-quarter of the circumference of the main landing gear tube. The remaining three-quarters of the circumference exhibited a 45-degree shear lip, with fracture surfaces consistent with an overload failure.

Conclusions

The accident resulted from a failure of the right main landing gear leg. The source does not provide a probable cause for the collapse.

Structural failure

Frequently asked questions

What happened in the 7 Jul 2005 Helio H-250 accident near Anchorage, AK?

During landing roll on a dry asphalt runway, the right main landing gear collapsed after a loud shuddering noise following brake application. Postaccident examination revealed corrosion and overload failure on the gear leg.

Were there any fatalities in the 7 Jul 2005 Helio H-250 accident?

No fatalities were recorded in this accident.

What aircraft was involved and where did it happen?

The accident on 7 Jul 2005 involved a Helio H-250, registration N333TB, at Anchorage, AK.

What was the probable cause of the accident?

A fracture failure of the main landing gear leg during the landing roll, which resulted in the collapse of the main landing gear.

More accident analyses

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20050718X01049. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.