TCAS question
Anybody have an explanation for what happened in this case...
The Arctic Rides LLC. Dassault-Breuget Falcon 50, N900KE, was enroute from PANC, Anchorage
to KFAR, Fargo at FL390. Winnipeg Centre passed an advisory of crossing traffic 1000 feet above
at FL400. The Fast Air Ltd. Gulfstream G150, C-FREE, operating as PBR150 was enroute from
CYWG, Winnipeg to CYYC, Calgary at FL400. Both aircraft were in visual contact and were
receiving erroneous TCAS Resolution Advisories (RA). N900KE was being advised to climb and CFREE
was being advised to descend. The TCAS RAs were disregarded by both crews. The aircraft
subsequently passed each other with approximately 1 mile lateral and 1000 feet vertical
separation. The event was discussed on a company frequency by the crews of each aircraft. The
crew of N900KE had noted a similar event approximately one hour previously while in Edmonton
Centre airspace. As a result of the two events, the crew of N900KE selected Traffic Advisory (TA)
only on their TCAS. Subsequent testing of the system did not reveal any faults however further
analysis of the TCAS processor will be carried out by the manufacturer. The crew of C-FREE
cancelled RVSM for the remainder of the itinerary. Subsequent testing did not reveal any faults and
the system was returned to service.