Incident at 200nm East St. John's (Conflict - loss of separation)


1997-07-16: ACA860 B767 enroute St. John's to London with a planned altitude of FL370 was given vectors North of track for the climb due to traffic and then was instructed to turn right to assume course. Shortly afterwards, the controller observed that SWR127 B747 was overtaking ACA860 which had not reached its assigned altitude. The controller then instructed ACA860 to turn left 15 degrees. Separation between the two aircraft had reduced to the following: 700 feet and 3.7 miles, 800 feet and 3.2 miles and 900 feet and 2.5 miles. The required separation was 1,000 feet or 5 miles. Traffic had been passed to both aircraft and SWR127 had ACA860 in sight. Nav Can is investigating.


CADORS Number 1997A0339
Occurrence Type Incident
Reported By NAV CANADA
Occurred At 1997-07-14 - 03:00
Day or Night?
Fatalities 0
Aerodrome ID
Aerodrome Name
Geographic Location Newfoundland and Labrador, Canada, North America, Atlantic Region, 200nm East St. John's
TSB Occurrence Number
TSB Class of Investigation
AOR Number
Reported By NAV CANADA
Categories Airprox/TCAS alert/loss of separation/(near) midair collisions
Events Conflict - loss of separation

Leave a Comment