Incident at HALIFAX / STANFIELD INTL NS (CYHZ) (Conflict - loss of separation, Conflict - IFR & VFR, Communication error)


2001-10-25: TSB Update Oct 23, 2001. A01A0130: C-GPEY, a Cessna 182, was on a VFR round robin training flight from Debert to Debert via the Halifax VOR at 3500 feet. The route of flight took C-GPEY through the departure path for runway 33 at Halifax airport. C-GPEY was flying in airspace where conflict resolution was being provided, and was in contact with Halifax tower. Canada 3000, a Boeing 737, flight number CMM7104, was departing IFR from Halifax for Toronto. When C-GPEY was approximately 12 nm north west of Halifax airport, the airport controller cleared CMM7104 for take off runway 33, and instructed the Canada 3000 crew to contact the Halifax terminal departure controller. When the two aircraft were 4 miles apart, the Halifax tower controller first attempted to contact CMM7104 to pass traffic, but without success. The controller then twice passed traffic on CMM7104 to C-GPEY. When the aircraft were 2 nm miles apart, C-GPEY established visual contact and turned left. The two aircraft passed with .4 nm lateral separation at the same altitude. C-GPEY had already turned away from the flight path of CMM7104 at that point. CMM7104 had been advised of the C-182 traffic by the Halifax terminal departure controller and reported the traffic in sight. The controller instructed CMM7104 to level off at 3000 feet, but received no response to that instruction. CMM7104 subsequently advised the controller that they had received a TCAS RA on the traffic.
2001-10-22: CGPEY VFR C182 transferred to Halifax Tower frequency at 1432Z. CMM7104 IFR B737 departed runway 33 at 1434Z. Unresolved question as to what traffic was passed between aircraft and when. Aircraft converged 6 NM NW of airport with minimal separation. TSB Evaluating.


CADORS Number 2001A0659
Occurrence Type Incident
Reported By NAV CANADA
Occurred At 2001-10-21 - 14:36
Day or Night? Day-time
Fatalities 0
Aerodrome ID CYHZ
Geographic Location Nova Scotia, Canada, North America, Atlantic Region,
TSB Occurrence Number A01A0130
TSB Class of Investigation Class 5
AOR Number 18351
Reported By NAV CANADA
Categories Airprox/TCAS alert/loss of separation/(near) midair collisions,ATM/CNS
Events Conflict - loss of separation,Conflict - IFR & VFR,Communication error

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