Incident at Regina, Saskatchewan (Aerodrome - power failure)
1997-01-03: A failure of the landline that carries the ATC radio frequency resulted in a loss of communications between IFR aircraft and the terminal control unit at Regina. CDR 1340, a Fokker 28 aircraft, was on a SID 5 departure from runway 31 Regina, with an IFR clearance to Calgary. The Regina SID 5 departure requires the aircraft to climb on a runway heading to 6,000 feet ASL and to anticipate radar vectors. In the event of a communications failure in IFR weather the aircraft must maintain its last assigned altitude until 10 minutes after take-off and proceed directly on course after reaching the last assigned altitude. When the loss of radio communication occurred, the terminal controller observed CDR1340 climb through 6,700 ASL and was concerned that a loss of separation or confliction would occur with ACA188, a DC-9 aircraft entering a left hand downwind approach for runway 31 and descending to 9,000 ASL. The terminal controller contacted the Regina Tower controller to instruct CDR1340 not to climb above 7,000 ASL and the aircraft levelled off at 7,000 ASL. The aircraft remained vertically separated by 2,000 in an area where the required minimum separation was 1,000 feet. Communications were re-established soon afterwards through the use of the back-up radio transceiver.
|Occurred At||- 22:37|
|Day or Night?|
|TSB Occurrence Number|
|TSB Class of Investigation|