Incident at ARVIAT NU (CYEK) (Conflict - loss of separation)

Summary

2005-01-18: UPDATE ANS and Airspace reported that Nav Canada will conduct a Level 2 Operational Safety Investigation.
2005-01-17: NWA 25, a B747-400, was en route from Detroit to Tokyo and over Hudson Bay and estimated to progress KEBVA at 2133Z. The aircraft did not progress KEBVA until 2136Z (3 minutes late) at FL 340, resulting in a 9 minute crossing track situation with BAW 269, where 10 minutes were required. The aircraft were already in conflict by the time the position report was received. NWA 25 was descended to FL 330 to re-establish separation.
2005-01-18: UPDATE TSB reported that N673US, a Boeing 747-400 operating as NWA 25 was en route from Detroit to Narita. The flight was planned to arrive overhead KEBVA intersection at 2133Z. Edmonton ACC had crossing traffic BAW 269 estimating KEBVA at 2143Z. At 2122Z, the Controller requested a progress report from NWA 25. The revised estimate for NWA 25 overhead Kebva, 2136Z, was not received until the crossing separation had decreased to 9 minutes, where 10 minutes was required. The Controller then cleared N673US to FL 330 where separation was re-established.

Details


CADORS Number 2005C0124
Occurrence Type Incident
Reported By NAV CANADA
Occurred At 2005-01-15 - 21:36
Day or Night? Day-time
Fatalities 0
Injuries
Aerodrome ID CYEK
Aerodrome Name ARVIAT NU (CYEK)
Geographic Location Nunavut, Canada, North America, Prairie and Northern Region, SE of Arviat at 6056N 9158W
TSB Occurrence Number A05C0013
TSB Class of Investigation Class 5
AOR Number 52822-V2
Reported By NAV CANADA
Categories Airprox/TCAS alert/loss of separation/(near) midair collisions
Events Conflict - loss of separation


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