Incident Overview
On an unspecified date, a multi-engine airplane operated by a flight school was taxiing at a non-tower-controlled airport. The pilot-receiving-instruction was looking down at his iPad, researching information, when he heard someone yell "Stop!" He applied the brakes immediately but the airplane collided with another airplane that was stopped on the taxiway, holding short of the runway.
Pilot and Instructor Actions
According to the Chief Pilot of the flight school operating the taxiing airplane, the pilot-receiving-instruction was "heads-in" while the flight instructor was inputting radio frequencies and unaware that the pilot was also looking inside the airplane. The instructor looked up just in time to hear a backseat passenger yell "stop" and witness the collision.
Stopped Airplane Details
The Safety Coordinator of the flight school that operated the stopped airplane reported that, while holding short of the runway and performing the before takeoff checklist, the flight instructor and pilot-receiving-instruction inside that airplane felt a hard impact from the rear. The stopped airplane sustained substantial damage to the elevator.
Mechanical Condition
Both the Safety Coordinator and the Chief Pilot reported that there were no preaccident mechanical failures or malfunctions with their respective airplanes that would have precluded normal operation.