Aircraft: Cessna 182. Injuries: None. Location: Houston, Texas. Aircraft damage: Substantial.
What reportedly happened: The pilot, who was returning to the airport after a short flight, performed the before-landing checklist, which included verification of landing gear extension. After touchdown both main landing gear legs collapsed. The nose gear remained extended and the airplane slid down the runway.
The subsequent examination of the airplane revealed that the electric motor that actuated the hydraulic power pack was inoperative. The failure of the power pack before the end of the gear extension cycle would result in a fully extended nose gear and a partial extension of the main landing gear legs.
Probable cause: The failure of the landing gear to fully extend and lock in the down position due to the inoperative electric pump motor.
NTSB Identification: CEN11CA155