BURLEY, Idaho (AP) — A plane that crashed in south-central Idaho last summer was at the maximum weight allowed after it was filled with more fuel than the pilot requested, federal officials say.

The National Transportation Safety Board, in a report released last week, did not include a probable cause for the July 1 crash of the single-engine plane that injured the two men aboard.

Officials say determining the cause could take seven more months, The Times-News reported.

Student pilot and plane owner Kim Johan Paulsen, 46, of Klamath Falls, Ore., received minor injuries, and flight instructor Christopher Butler, 34, of Harper, Ore., suffered a shattered foot that required surgery.

Paulsen had recently bought the plane in New York and landed at Burley Municipal Airport for gas. Paulsen said the attendant filled the tank with 67.7 gallons rather than the 30 gallons requested.

Paulsen and Butler discussed siphoning out some of the fuel but decided that wasn't needed. Paulsen said the plane took off weighing 3,150 pounds, the maximum allowed.

Paulsen told officials the plane sounded normal before takeoff and became airborne about three-quarters of the way down the runway.

Butler said he confirmed that various controls were in the proper positions but that the plane seemed to hit "dead air" after flying over a stand of trees.

According to the report, Paulsen then handed the controls to Butler, who told Paulsen to brace for impact.

The plane hit utility lines, knocking out power to a large portion of downtown, and crashed in a vacant lot.

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Information from: The Times-News