Bombardier Learjet Undifferentiated or Other Model
Air Traffic Control Fully Certified
Training / Qualification; Situational Awareness; Confusion
ATC Issue All Types; Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Clearance
General None Reported / Taken
Human Factors; Procedure
I was training a Developmental on the G scope. The Developmental told a Lear on the downwind to the airport that their sequence was another Lear at 11 o'clock and 6 miles; 2 miles west of ZZZZZ. The Lear on the down wind reported the other Lear in sight. The Developmental instructed the Lear to follow the traffic; cleared Visual Approach to Runway XX. After acknowledging the clearance; the Lear pilot requested to be switched to the Tower. The Developmental switched the Lear to the Tower frequency. I then immediately told the Developmental to call the Tower and coordinate the Visual Approach because we could not ensure that the Lear on the Visual Approach would be established on a 7 mile final per LOA. The Tower said unable and that the 2nd Lear was turning base early and following the wrong aircraft. Had the Lear followed the correct traffic; coordination would most likely not be needed and separation would have been ensured.
TRACON Controller providing OJT described a confused sequence event and potential conflict when a Lear was cleared for a Visual Approach to follow another Lear on final; but cut in front of the straight in traffic.