Incident at 30 NM NW of EDMONTON INTL AB (CYEG) (Conflict - loss of separation, Alleged Canadian Aviation Regulations (CARs) infraction)


2003-03-05: UPDATE TSB reported that C-GHOC, a Beech King Air 100, operating as KBA 100 was en route from Red Earth Creek AB (CEH5), to Edmonton Intl (CYEG) at 10,000 feet asl. Piper PA-31, C-FXLO was en route from Red Earth Creek to Ponoka (CEH3) at 9,000 feet. Approximately 30 NM northwest of Edmonton, the crew of KBA 100 was advised that they would be allowed to descend to a lower altitude once they were 3 miles past their traffic. The Controller noticed that KBA 100 had descended to 9,600 feet, and when this was brought to the attention of the crew, they climbed back to 10,000 feet. Separation was reduced to 700 feet vertically and 1.5 NM laterally where 1,000 feet and 3 NM was required.
2003-02-12: Approximately 30NM Northwest of Edmonton International Airport KBA100 (10,000 feet)was overtaking FXLO (9,000 feet). The controller advised KBA100 he would get the aircraft lower once he was 3 miles past his traffic (told the pilot twice because he got no response the first time) and then noticed KBA100 had descended below 10,000 (was showing 9,600 on the radar) so he asked if the aircraft was leveling at 10,000 (aircraft had been cleared to 10,000 from 14,000 earlier by the Enroute Controller) to which the pilot replied ""Roger"" and then the controller noticed the aircraft climbed to 10,000 and leveled off. The traffic was showing at 8,900 and when KBA100 was at 9,600 it was only 1.5NM away from FXLO which is below the standard required in this area. The required separation is either 1,000 feet or 3NM. The pilot of KBA100 made no excuse for why he descended below his last assigned altitude.


CADORS Number 2003C0187
Occurrence Type Incident
Reported By NAV CANADA
Occurred At 2003-02-11 - 18:17
Day or Night? Day-time
Fatalities 0
Injuries 0
Aerodrome ID
Aerodrome Name
Geographic Location Alberta, Canada, North America, Prairie and Northern Region, 30 NM NW of EDMONTON INTL AB (CYEG)
TSB Occurrence Number A03W0029
TSB Class of Investigation Class 5
AOR Number 27520
Reported By NAV CANADA
Categories Other,Airprox/TCAS alert/loss of separation/(near) midair collisions
Events Conflict - loss of separation,Alleged Canadian Aviation Regulations (CARs) infraction

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