Incident at Northwest of Saint John NB


1999-01-25: ICN2205 ATR43 enroute Halifax to Montreal FL180. ICN2243 ATR43 enroute Saint John to Montreal FL160 requesting FL180. At time of occurrence, both aircraft were proceeding direct Millinocket (MLT) ICN2243 ahead of ICN2205 by aprx 7.5 miles, 20 knots faster was given clearance to climb with a speed requirement. ICN2243 then turned northerly towards Houlton then gradually turned back towards Millinocket When ICN2243 reported at FL180 the speed restriction was restated. At the time of handoff to Boston ATC, ICN2243 had continued the turn and was tracking westerly 255-270 degrees and the spacing between ICN2243 and ICN2205 was decreasing. The Controller issued a descent instruction to FL160 to ICN2243 three (3) times before the aircraft left FL180. A turn of 30 degrees right was issued to ICN2205. Aircraft were aprx 5 miles apart. TSB case closed. Update: The separation between the two aircraft deteriorated to 4.7 miles horizontal where 5 miles horizontal or 1000 feet vertical is required. Separation was restored when ICN2243 descended to 16,000 feet and ICN2205 was instructed to turn 30 degrees right. The operator will have further information for TSB.


CADORS Number 1999A0008
Occurrence Type Incident
Reported By NAV CANADA
Occurred At 1999-01-03 - 22:53
Day or Night?
Fatalities 0
Aerodrome ID
Aerodrome Name
Geographic Location New Brunswick, Canada, North America, Atlantic Region, Northwest of Saint John NB
TSB Occurrence Number
TSB Class of Investigation
AOR Number
Reported By NAV CANADA
Categories Airprox/TCAS alert/loss of separation/(near) midair collisions

Aircraft Details (1 aircraft)

Type Aeroplane
 Silhouette image of Aeroplane
Canadian Registration
Foreign Registration
Country of Registration Canada
Occurrence Type Incident
Operator Commercial
Make  Silhouette image of AEROSPATIALE
Model ATR 42 300
Year Built
Engine Type
Engine Make
Engine Model
Gear Type Land
Private No
Amateur Built No
Flight Number ICN2243
Flight Rule
CARS Subpart
Phase of Flight Climb
Damage Unknown
Fatalities 0
Injuries 0
Events Conflict - loss of separation

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