Incident
at SLAVE LAKE AB (CYZH)
(Conflict - potential)
Approximately 40 miles south of Slave Lake, Alberta, both aircraft were converging at 6000 feet with less than the minimal procedural separation. This occurred after radar contact may have been lost. The situation was resolved as soon as communication was restored. UPDATE: C-GLLH, a Piper PA34, with one pilot and three passengers on board, was northbound at 6000 feet IFR en route from Edmonton International direct to Red Earth, AB, and was estimating abeam Slave Lake, AB at 1858Z. C-GQHV, a Piper PA31, with one pilot and six passengers on board, was northbound at 6,000 feet IFR en route from Calgary International direct to Red Deer, AB direct Slave Lake, estimating at 1855Z. C-FVVS, a Piper PA31, call sign CNS351, with one pilot and six passengers on board, was southbound at 7,000 feet IFR en route from Red Earth direct to Edmonton International, and was estimating Slave Lake at 1827Z. The Edmonton Area Control Centre Whitecourt Sector Controller had planned to get C-FVVS and C-GLLH passed each other on radar, then climb C-GLLH to 7,000 feet before C-GLLH and C-GQHV disappeared on radar, so that he could apply radar separation instead of procedural controlling. As it happened, the controller could not radar identify or communicate with C-FVVS to confirm position by the time C-GLLH and C-GQHV disappeared on radar. Consequently, there was a loss of procedural separation and an operating irregularity. C-FVVS was eventually identified, C-GLLH was given a clearance to 7,000 feet and C-GQHV was cleared to the Slave Lake Airport for an approach. The situation was resolved as soon as communications was restored. An Edmonton ACC operating irregularity report has been filed with NavCanada.