No fatalities

Amphibious Plane Strikes Submerged Object and Noses Over (N756UF)

Block Island, RI, US

On August 22, 1991, a Cessna TU206G (registration N756UF) operated by Roebling Aviation was involved in an aviation accident near Block Island, RI. No fatalities were reported. Investigators recorded the probable cause as: IMPROPER PLANNING/DECISION BY THE PILOT BY ELECTING TO TAKEOFF WITH A KNOWN DEFICIENCY WITH THE EQUIPMENT. THE DEFICIENCY (CRACKED/LEAKING FLOAT) WAS A RELATED FACTOR. 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

An amphibious airplane struck a submerged object while taxiing in a harbor, causing a float crack. After pumping the float dry, the pilot aborted takeoff as water refilled it, leading to the float dipping and the airplane nosing over.

Incident Overview

An amphibious airplane was involved in an accident in a harbor. The pilot had landed the plane on the water and was taxiing toward the dock when the left float struck a submerged object.

Sequence of Events

After the impact, the pilot brought the airplane onto a beach and inspected the left float, discovering a crack. He pumped the float dry and subsequently decided to take off. However, during the takeoff attempt, he noticed the left float was filling with water and aborted the takeoff. Following the abort, the left float dipped under the water, causing the airplane to nose over.

Damage

Initial inspection revealed a crack in the left float. The nosed-over event likely resulted in additional damage to the aircraft.

Frequently asked questions

What happened in the 22 Aug 1991 Cessna TU206G accident near Block Island, RI?

An amphibious airplane struck a submerged object while taxiing in a harbor, causing a float crack. After pumping the float dry, the pilot aborted takeoff as water refilled it, leading to the float dipping and the airplane nosing over.

Were there any fatalities in the 22 Aug 1991 Cessna TU206G accident?

No fatalities were recorded in this accident.

What aircraft was involved and where did it happen?

The accident on 22 Aug 1991 involved a Cessna TU206G, registration N756UF, operated by Roebling Aviation, at Block Island, RI.

What was the probable cause of the accident?

IMPROPER PLANNING/DECISION BY THE PILOT BY ELECTING TO TAKEOFF WITH A KNOWN DEFICIENCY WITH THE EQUIPMENT. THE DEFICIENCY (CRACKED/LEAKING FLOAT) WAS A RELATED FACTOR.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001212X17962. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.