Cessna 172 N13796 and Piper PA28 N38657 accident near Gaithersburg, Maryland

Probable cause

The flight instructor's failure to maintain clearance from the other airplane while taxiing.

The other pilot's failure to maintain clearance from the airplane while taxiing.

NTSB analysis

The pilot of the Piper reported that, after landing and while taxiing back to his parking spot, he saw a Cessna holding short at the intersection to the same taxiway. He did not see the Cessna move, so he continued to taxi but then felt a "strong impact" as his airplane passed the Cessna. The flight instructor in the Cessna reported that he was taking a passenger on a familiarization flight. After clearing the taxiway from the ramp, he maneuvered the Cessna to the taxiway intersection. He then saw the Piper taxi past him and believed he had adequate clearance, so he continued to maneuver and turned left onto the taxiway. While the instructor simultaneously instructed the passenger while taxiing, the Cessna's left wingtip impacted the Piper's engine and left aileron. The instructor added that he should have waited for the Piper to pass the airplane and should have spent more time briefing the passenger to reduce task saturation. The Piper sustained substantial damage to the left aileron. The Cessna sustained minor damage to the lower engine cowling and propeller. Both pilots reported that there were no preaccident mechanical failures or malfunctions with their airplanes that would have precluded normal operation.

The pilot of the Piper reported that, after landing and while taxiing back to his parking spot, he saw a Cessna holding short at the intersection to the same taxiway. He did not see the Cessna move, so he continued to taxi but then felt a "strong impact" as his airplane passed the Cessna. The flight instructor in the Cessna reported that he was taking a passenger on a familiarization flight. After clearing the taxiway from the ramp, he maneuvered the Cessna to the taxiway intersection. He then saw the Piper taxi past him and believed he had adequate clearance, so he continued to maneuver and turned left onto the taxiway. While the instructor simultaneously instructed the passenger while taxiing, the Cessna's left wingtip impacted the Piper's engine and left aileron. The instructor added that he should have waited for the Piper to pass the airplane and should have spent more time briefing the passenger to reduce task saturation. The Piper sustained substantial damage to the left aileron. The Cessna sustained minor damage to the lower engine cowling and propeller. Both pilots reported that there were no preaccident mechanical failures or malfunctions with their airplane or engine that would have precluded normal operation.

Text from the NTSB. Open the NTSB docket for GAA19CA468 for the full record.