Incident at 100 NM NW of Iqaluit, NU (Conflict - loss of separation, ATS operating irregularity)


1999-10-12: KLM 602, a B747, was enroute from Los Angeles to Amsterdam at FL 330 and UAL 954, a B777, was enroute from San Francisco to Heathrow at FL 370 about 6 minutes apart approximately 100 miles northwest of Iqaluit. Reykjavik ACC contacted Edmonton ACC to explain that a controller had mistakenly cleared the crew of KLM 602 to FL 370 and then re-cleared them back to FL 330. It was confirmed that KLM 602 reached FL 370 before to error was detected, which resulted in less than the required 10 minutes longitudinal separation between the two a/c. A subsequent conversation with the Shift Manager at Reykjavik ACC revealed that the error occurred because the clearance to KLM 602 to climb was intended for KLM 606, which was further ahead in Reykjavik airspace. OPI - ANS and Airspace UPDATE ANS reported that NavCanada will not be investigating this occurrence further.


CADORS Number 1999C0822
Occurrence Type Incident
Reported By NAV CANADA
Occurred At 1999-09-26 - 05:15
Day or Night? Night-time
Fatalities 0
Aerodrome ID
Aerodrome Name
Geographic Location Nunavut, Canada, North America, Prairie and Northern Region, 100 NM NW of Iqaluit, NU
TSB Occurrence Number
TSB Class of Investigation
AOR Number
Reported By NAV CANADA
Categories Airprox/TCAS alert/loss of separation/(near) midair collisions,ATM/CNS
Events Conflict - loss of separation,ATS operating irregularity

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