Medium Large Transport
Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 12.5
Communication Breakdown; Distraction; Situational Awareness; Training / Qualification
ATC Issue All Types; Conflict Ground Conflict; Less Severe; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy; Ground Incursion Runway
Air Traffic Control Separated Traffic; Flight Crew Requested ATC Assistance / Clarification
Procedure; Human Factors
While training a developmental; on a configuration that he had never seen before (landing RWY 14R; departing RWY 28R EE intersection (and full length); we had an international heavy cargo jet; Aircraft Y arrive runway 14R; who needed to get to cargo [ramp].  The aircraft exited RWY 14R; and was instructed to taxi and hold short of RWY 28R on Tango.  After a departure rolled; the developmental issued clearance to cross RWY 28R.  Aircraft X was eventually put into 'line up and wait' and was waiting for the departure gap on RWY 14R as we are required to apply CRO [Converging Runway Operation] rules for converging runways.  Once we had the departure gap; the developmental cleared Aircraft X for takeoff (with my instruction; as I was watching the departure gap) without delay (more than 2 minutes after the runway crossing was issued to Aircraft Y). The pilot questioned the departure clearance immediately; I then looked at the intersection; and immediately cancelled the takeoff clearance. After Aircraft Y had cleared runway 28R; we waited until the next departure gap on runway 14R; and departed Aircraft X in that gap. The developmental has been taught that whenever you are crossing a runway; the departure strip that is in LUAW (Line Up and Wait) status needs to be flipped over; so one cannot read the strip as a memory jogger.  In this situation; I do not recall the strip being flipped over; and neither does the developmental.  The strip needed to be flipped over.
ORD Local instructor reports the Developmental crosses traffic downfield; then clears an aircraft for takeoff. Departing pilot questions clearance and Local Control cancels takeoff until crossing is complete. Reporter does not recall using the memory jogger for crossing aircraft.