Incident at EDMONTON INTL AB (CYEG) (Overshoot/missed approach, Conflict - loss of separation, ATS operating irregularity)

Summary

2003-04-10: UPDATE ANS and Airspace reported that Nav Canada will hold an Operational Safety Investigation concerning this incident.
2003-04-11: UPDATE TSB reported that the Morningstar Air Express Boeing 727-100, operating as MAL 8068, was on a three mile final approach to Runway 02 at the Edmonton International Airport. A WestJet 737, WJA 532, was on a 6 mile final approach to Runway 12. Ten miles west of the airport a second WestJet 737-200, WJA 41, was being vectored to Runway 12. The Arrival Controller was using speed control between MAL 8068 and WJA 532. The Arrival Controller pointed out traffic on approach for Runway 12 to MAL 8068 and they were not able to identify it. To ensure separation at the threshold, the Arrival Controller changed MAL 8068's runway to 12 and vectored MAL 8068 on a heading of 340°M for Runway 12. The vector placed MAL 8068 on a right base for Runway 12, between WJA 532 and WJA 41. A loss of separation occurred between WJA 41 and MAL 8068 when the distance between the aircraft decreased to 1 mile horizontally and 500 feet vertically where 3 miles or 1000 feet are required. Tower instructed WJA 41 to overshoot Runway 12. At the same time WJA 41 received a TCAS Advisory and began to climb.
2003-04-09: At 1516Z, MAL 8068, a B727, was on 3-mile final approach for Runway 02 at Edmonton (YEG) and WJA 532, a B737-700, was on 6-mile final approach for Runway 12. WJA 41, a B737-200, was approximately 10 miles west of YEG was being vectored for Runway 12. The Arrival Controller was using speed control between MAL 8068 and WJA 532. At 1518Z, the Arrival Controller pointed out traffic to the crew of MAL 8068 and they did not have the traffic in sight. The Arrival Controller recognized that at the current speeds, separation would not be maintained at the threshold. The Arrival Controller then asked MAL 8068 if they could do a right hand base leg on Runway 12 from his position. The crew of MAL 8068 advised that they could do the right hand for Runway 12 and the Arrival Controller turned MAL 8068 to a heading of 340 degrees. The crew of WJA 41 asked the Arrival Controller if they could contact Tower and the Arrival Controller advised 'not over to Tower yet'. WJA 41 then contacted Edmonton Tower. At 1518Z, the Arrival Controller turned MAL 8068 in between WJA 532 and WJA 41. WJA 41 was subsequently instructed to overshoot by Edmonton Tower. A loss of separation occurred when the Arrival Controller instructed MAL 8068 to turn right base and follow WJA 532 with WJA 41 on a 4-mile final for Runway 12. Separation required is 3 miles or 1,000 feet. Separation achieved was 1 mile and 500 feet. At the same time as the Tower instructed WJA 41 to overshoot, WJA 41 received a TCAS Advisory and began to climb. MAL 8068 landed at 1520Z and WJA 41 circled for Runway 20 and landed at 1527Z. TSB has been in contact with the companies involved.

Details


CADORS Number 2003C0437
Occurrence Type Incident
Reported By NAV CANADA
Occurred At 2003-04-08 - 15:18
Day or Night? Day-time
Fatalities 0
Injuries
Aerodrome ID CYEG
Aerodrome Name EDMONTON INTL AB (CYEG)
Geographic Location Alberta, Canada, North America, Prairie and Northern Region, EDMONTON INTL AB (CYEG)
TSB Occurrence Number A03W0072
TSB Class of Investigation Class 5
AOR Number 28574
Reported By NAV CANADA
Categories Undershoot/overshoot,Airprox/TCAS alert/loss of separation/(near) midair collisions,ATM/CNS
Events Overshoot/missed approach,Conflict - loss of separation,ATS operating irregularity


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