Date: March 05, 1967
Time: 20:07
Location: Near Marseille, Ohio
Operator: Lake Central Airlines
Flight #: 527
Route: Colombus - Toledo
AC Type: Convair CV-580
Registration: N73130
cn / ln: 023
Aboard: 38   (passengers:35  crew:3)
Fatalities: 38   (passengers:35  crew:3)
Ground: 0
Summary: The aircraft crashed following the separation in flight of all four blades of the right propeller. No. 2 blade penetrated and destroyed the structural integrity of the fuselage. Malfunction of the hydraulic pitch control mechanism. Uncontrollable overspeeding. Propeller separation in flight. Omission of the torque piston nitriding process during manufacture and failure of quality control to detect the omission.

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