Skip to content

Atlas / NTSB / GAA19CA468

NTSB CAROL · Event

Event GAA19CA468

2019-07-27 Gaithersburg, Maryland, United States Airport · GAI None 1 aircraft Status: Completed

Aircraft involved

Probable cause & findings

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

Factual narrative

The pilot of the Piper reported that, after landing, 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 of 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 a Piper airplane taxi past him and believed he had adequate clearance, so he continued to maneuver and turned left on to the taxiway. While simultaneously instructing the passenger during the movement, the Cessna's left-wing tip 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. The flight instructor and the pilot reported that there were no mechanical failures or malfunctions with their airplane or engine 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 airplanes that would have precluded normal operation. Source: NTSB Aviation Accident Database Retrieved: 2026-02-12

NTSB Findings

Hierarchical cause / factor breakdown from the FAA bulk avdata database. Each finding tagged C (Cause) or F (Factor).

  • C Personnel issues-Psychological-Attention/monitoring-Monitoring other aircraft-Instructor/check pilot - C
  • C Environmental issues-Physical environment-Object/animal/substance-Aircraft-Effect on operation - C
  • C Personnel issues-Psychological-Attention/monitoring-Monitoring other aircraft-Pilot of other aircraft - C
  • C Environmental issues-Physical environment-Object/animal/substance-Aircraft-Effect on operation - C

Verbatim from NTSB's published report. Source file NTSB_2019_GAA19CA468.txt. Findings + structured fields enriched from FAA avall.mdb. Full investigation docket on data.ntsb.gov ↗.