Incident at WINNIPEG / JAMES ARMSTRONG RICHARDSON INTL MB (CYWG) (Conflict - potential, Communication error, ATS operating irregularity)

Summary

2001-07-03: UPDATE ANS and Airspace reported that NAV CANADA will convene a Fact Finding Board.
2001-06-20: At 1439Z, the Controller working Winnipeg East Sector cleared Air Canada 189, an A320 inbound to Winnipeg from Toronto, to maintain 16,000 feet. The crew read back 7,000 feet and the Controller missed the error. The Controller was relieved and then went on a break. The error was discovered when ACA 189 was eventually cleared to 7,000 feet and the crew replied they were already cleared to 7,000 feet. ACA 189 had been given clearance to descend to 16,000 feet because of C-FKJI, a Beech King Air, southeast bound at 15,000 feet. The aircraft passed each other 12,000 feet apart. When ACA 189 reported leaving FL 350 the crew did not state their cleared altitude. TSB will be contacting NAV CANADA.
2001-06-27: UPDATE TSB reported that the Beech Super King Air, C-FKJI operated by Walsten Air Service, was enroute from Winnipeg to Fort Frances under IFR at 15,000 feet. The Airbus A320, ACA 189, was inbound to Winnipeg at FL 350, and was cleared by the ACC Winnipeg East Controller to descend to 16,000 feet at pilots' discretion. The crew read back 7,000 feet. ACA 189 was descending through FL 271 when it passed C-FKJI, still level at 15,000, and the minimum horizontal spacing between the two aircraft was 2.96 NM. The separation standard required was 5 NM horizontally or 1,000 feet vertically. A separation plan was not in effect when ACA 189 passed C-FKJI, and safety was not assured.

Details


CADORS Number 2001C0652
Occurrence Type Incident
Reported By NAV CANADA
Occurred At 2001-06-19 - 14:39
Day or Night?
Fatalities 0
Injuries
Aerodrome ID CYWG
Aerodrome Name WINNIPEG / JAMES ARMSTRONG RICHARDSON INTL MB (CYWG)
Geographic Location Manitoba, Canada, North America, Prairie and Northern Region, 80 NM E of Winnipeg
TSB Occurrence Number A01C0124
TSB Class of Investigation Class 5
AOR Number 15871
Reported By NAV CANADA
Categories Airprox/TCAS alert/loss of separation/(near) midair collisions,ATM/CNS
Events Conflict - potential,Communication error,ATS operating irregularity


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