Federal investigators are expected to release a preliminary summary of their probe of a racing plane crash that killed 11 people in Reno and injured at least 80.

A National Transportation Safety Board official says there won't be any conclusions in the report due out Friday.

Key clues are expected to come from an onboard data box and camera equipment believed to be from the plane.

NTSB member Mark Rosekind has said investigators collected numerous spectator videos and photos along with "tremendous amounts" of other material from the scene of the Sept. 16 crash during the National Championship Air Races at Reno-Stead Airport.

Florida pilot Jimmy Leeward was among those killed when his modified World War II-era P-51 Mustang fighter plane crashed nose-first into a section of VIP box seats.

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