On 29 November 1976, an unrestrained German shepherd on board a Grand Canyon Air Piper 32-300 interfered with the controls, causing the plane to crash.

ACCIDENT DETAILS
Date: November 29, 1976
Time: 14:20
Location: Grand Canyon, Arizona
Operator: Grand Canyon Air – Air Taxi
Flight #: 32-40443
Route: Grand Canyon, AZ – Denver, CO
AC Type: Piper PA-32-300
Registration: N4125R
cn / ln: ?
Aboard: 2 (passengers:1 crew:1)
Fatalities: 2 (passengers:1 crew:1)
Ground: 0
Summary: The aircraft crashed while on final approach. An unrestrained German Shepard interfered with flight controls.