Incident at Calgary, AB (Conflict - potential, ATS operating irregularity)
1999-07-29: The crew of ACA 221, a DC-9, was in position on Runway 34 at Calgary International Airport and Tower cleared them for takeoff. When ACA 221 did not go, Tower queried the crew who informed Tower that there was a Cessna 150, C-FVGX, rolling for takeoff in front of them. ACA 221 was then instructed to exit the runway because of traffic on final. ACA 851, an A340 on final for Runway 34 after a flight from Heathrow, was pulled up and went around for a second approach. Initial information is that the Cessna 150 was forgotten about by ATC. OPI - ANS and Airspace UPDATE ANS reported that a Fact-Finding Board will be convened. TSB reported that THERE WERE THREE AIRCRAFT IN THE HOLDING AREA FOR RUNWAY 34 AWAITING TAKEOFF AT THE CALGARY INTERNATIONAL AIRPORT, WITH AN AIRBUS 340 (ACA 851) AS NO. 1 ON FINAL APPROACH. THE FIRST AIRCRAFT FOR DEPARTURE WAS A CESSNA 150, C-FVGX, WITH A STUDENT PILOT AND AN INSTRUCTOR ON BOARD. AFTER CALLING C-FVGX TWICE WITH INSTRUCTIONS TO TAXI TO POSITION ON RUNWAY 34, AND NOT RECEIVING ANY RESPONSE, THE CONTROLLER CALLED THE NEXT AIRCRAFT, A DC-9, (ACA 221) WITH CLEARANCE FOR AN IMMEDIATE TAKE-OFF. ACA 221 TAXIED OUT ONTO THE RUNWAY 34, AND WHEN THE CONTROLLER QUERIED THE DELAY IN TAKING OFF, THE CREW ADVISED HIM THAT C-FVGX HAD TAXIED OUT AHEAD OF THEM AND WAS DEPARTING. SINCE THEY DID NOT HAVE SUFFICIENT TIME TO FOLLOW BECAUSE OF SPACING FOR ACA 851 TO LAND, ACA 221 ADVISED THAT THEY WERE TAXIING CLEAR OF THE ACTIVE. THE CONTROLLER HAD ACA 851 INITIATE AN OVERSHOOT, THEN MADE A BLIND TRANSMISSION TO C-FVGX FOR AN IMMEDIATE RIGHT TURN FOR WAKE TURBULENCE SEPARATION. C-FVGX COMPLIED AND ACKNOWLEDGED, AND NORMAL AIRPORT OPERATIONS RESUMED. FURTHER DISCUSSIONS WITH THE CREW OF C-FVGX REVEALED THAT THE CREW HAD HEARD THE CLEARANCE TO POSITION ON THE ACTIVE, AND THOUGHT THAT THE IMMEDIATE TAKEOFF CLEARANCE ISSUED TO ACA 221 WAS FOR THEM.
|Occurred At||- 23:25|
|Day or Night?|
|TSB Occurrence Number|
|TSB Class of Investigation|