Elevator control loss due to firewall damage during hard landing (N3332U)

What happened

The pilot reported that the aircraft experienced a hard landing. Prior to this event, the pilot noted that elevator control had become partially disabled. The exact circumstances leading to the initial loss of control authority were not detailed in the narrative provided.

The investigation

A post-accident examination of the airplane was conducted to determine the mechanical cause of the control issues. Inspectors found that the firewall was bent at the point where the left and right elevator cable pulleys were attached. This deformation caused the pulleys to become dislocated, which in turn released the tension on the elevator cables.

Findings

The investigation identified a bent firewall as the primary mechanical failure. The displacement of the elevator cable pulleys resulted in a loss of cable tension, leading to partial disablement of elevator control. This sequence of events contributed to the hard landing reported by the pilot.