Incident at 60N/40W (Conflict - loss of separation)


2001-04-30: CFG196 B767-300 enroute Frankfurt to La Habana was on routing 60/40, 59/50 PRAWN at 32,000 feet and requesting 34,000 feet. COA5 B777-200 enroute Gatwick to Houston was on routing 60/40, 59/50 PRAWN at 34,000 feet. The controller checked and verified that 34,000 feet was not available, and intended to clear flight to 33,000 feet, however when clearance was issued,34,000 feet was given .When the flight levelled at 34,000 feet the controller realized the error and cleared CFG196 down to 33,000 feet. Separation required was 1000 feet or 10 minutes . Separation achieved was 7 minutes . TSB Case Closed
2001-05-04: Follow-up information from ANS & Airspace : A level 1 OSI has been conducted by Nav Canada.
2001-05-01: TSB Update A01A0042: CFG196, a Boeing 767-200, was routing westbound 60/40 (1448z), 59/50 (1530z), PRAWN, at FL 320 and requested FL340. COA5, a Boeing 777-200, was also routing westbound 60/40 (1441) 59/50 (1520) and PRAWN, at FL340. The controller checked and verified that FL340 was unavailable for CFG 196 due to the preceding COA5, and meant to clear CFG196 to FL330; however, the clearance was issued as FL340 by the controller. When CFG196 levelled at FL340 the controller realised the error and cleared CFG 196 down to FL330. The separation required was 1000 feet or 10 minutes. The spacing achieved was seven minutes.


CADORS Number 2001A0241
Occurrence Type Incident
Reported By NAV CANADA
Occurred At 2001-04-29 - 14:51
Day or Night? Day-time
Fatalities 0
Aerodrome ID
Aerodrome Name
Geographic Location Newfoundland and Labrador, Canada, North America, Atlantic Region, 60N/40W
TSB Occurrence Number
TSB Class of Investigation
AOR Number 14995
Reported By NAV CANADA
Categories Airprox/TCAS alert/loss of separation/(near) midair collisions
Events Conflict - loss of separation

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