LAS VEGAS — The plane that crashed into spectators at an air race in Reno last year bore modifications that weakened its structure and showed evidence that it was flown beyond its limits, investigators said Monday.
The National
Transportation Safety Board deemed the failure of a tail structure to be
the probable cause of the crash of the souped-up World War II-era P-51
Mustang fighter that killed Ocala pilot Jimmy Leeward and 10 people on
the ground at last year’s National Championship Air Races in Reno and
injured more than 70.
Leeward
also was blamed for failing to fully document and test extensive
modifications to the aircraft before the September 2011 crash.
Board member Robert Sumwalt said: “If you want to go out and fly fast and try to win, that’s one thing.”
But
“if you’re modifying an aircraft without fully understanding how the
modifications can affect the aerodynamics, you’re playing Russian
roulette,” Sumwalt said.
Structural
modifications of the aircraft dubbed the Galloping Ghost made it
lighter and reduced drag, according to the NTSB report. But flight
control modifications also made the aircraft less stable. The NTSB found
that an elevator trim tab malfunction created aerodynamic instability
that made Leeward’s plane uncontrollable.
High-resolution
photos show the skin wrinkling and the canopy separating the plane
seconds before the crash, and NTSB investigators later found loose
screws in the crucial tail assembly.
At
a board hearing in Washington, D.C. Chairwoman Deborah Hersman blamed
the 74-year-old Leeward for “operating at the edge of the envelope”
without fully reporting and testing modifications to his plane.
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