NTSB Identification: ANC07CA034.
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Accident occurred Sunday, April 29, 2007 in Delta Junction, AK
Probable Cause Approval Date: 07/25/2007
Aircraft: Piper PA-12, registration: N3613M
Injuries: 1 Uninjured.

NTSB investigators used data provided by various entities, including, but not limited to, the Federal Aviation Administration and/or the operator and did not travel in support of this investigation to prepare this aircraft accident report.

The pilot was conducting off airport landings in a tundra-tire equipped airplane under Title 14, CFR Part 91. During a telephone conversation with the National Transportation Safety Board investigator-in-charge on April 30, the pilot reported he had flown the airplane for about an hour since his previous off airport landing. He said when he touched down, unknown to him, his right main landing gear tire was flat, and due to its large size, he was unable to maintain directional control on the ground. The airplane exited the intended landing area into rough and uneven terrain. He reported airplane nosed over, and the left wing lift-strut was bent. The pilot said when he examined the deflated tire he found a stick imbedded in the tire, which he believes was from his previous landing.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

The damaged and deflated over-sized tire on the main landing gear, which precipitated a loss of directional control during landing.

Full narrative available

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