Part 121 Taxi/Parked Ground Conflict Related Incidents

This presentation reviews voluntary safety reports received by NASA's Aviation Safety Reporting System pertaining to Part 121 Taxi/Parked Ground Conflicts.

Ground Conflict, Critical
• Two or more aircraft (one may be airborne) in conflict, or an aircraft in
conflict with a vehicle/person/object in which the reporter or other
involved party took evasive action to avoid a collision, or a collision that
almost occurred in cases where evasive action was not taken or
possible. The evasive action can include an emergency go-around,
veering on a taxiway/runway, rejected takeoff/abort, emergency
braking, or an aircraft overflying another aircraft 50 feet or less.
 Ground Conflict, Less Severe
• Two or more aircraft (one may be airborne) in conflict, or an aircraft in
conflict with a vehicle/person/object in which the reporter or other
involved party may, or may not have taken precautionary avoidance
action, and in which a collision hazard was not imminent.
 Ground Event / Encounter – Aircraft
• Actual physical contact with another aircraft when aircraft is on the
ground. All Aircraft Involved in Incidents Conflicting Aircraft by Weight Classification Flight Conditions and Time (Quarter of Day) Contributing Factors and Human Factors (Event)