On April 7, 1994, a Piper PA-12 (registration N2834M) operated by Banner Dragon Inc. was involved in an aviation accident near Merritt Island, FL. Investigators recorded the probable cause as: The grappling hook digging into the ground during a maneuvering dive, which caused it to become entangled in the horizontal stabilizer and elevator control surfaces, resulting in loss of control. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.
A banner-towing airplane crashed at an airport after its tow rope grappling hook dug into the ground, became entangled in the stabilizer and elevator, causing loss of control.
What happened
The aircraft was engaged in banner towing operations when it executed a maneuvering dive to retrieve a banner. During this phase of flight, the grappling hook attached to the tow rope dug into the ground surface. The impact caused the hook to bounce upward and become lodged between the horizontal stabilizer and the left elevator control surface.
The entanglement disrupted normal pitch and yaw control authority. Observers noted the airplane nose up abruptly, followed by a left yaw and a subsequent nose-down pitch attitude. The aircraft then crashed into a mangrove swamp located on the airport grounds.
The investigation
Post-accident examination of the wreckage revealed that the tow rope ring was jammed firmly between the stabilizer and the elevator. This physical obstruction prevented the control surfaces from functioning as intended, directly linking the ground contact to the loss of control.
Probable cause
The grappling hook digging into the ground during a maneuvering dive, which caused it to become entangled in the horizontal stabilizer and elevator control surfaces, resulting in loss of control.