DC3 HAS ENG FAILURE ON TKOF ROLL; REJECTS TKOF; LEAVES RWY; ENTERS RAMP AND GND LOOPS TO AVOID COLLISION WITH A TAXIING ACFT.

Narrative

ACFT Z; AN A320; HAD JUST EXITED RWY 23 AT TXWY G AND WAS HOLDING ON TXWY A WAITING FOR ACFT Y TO REPOSITION FROM HIS GATE TO ANOTHER ONE. ACFT X; A DC3; WAS CLRED FOR TKOF AND ROLLING ON RWY 23. ACFT X LOST L ENG ON TKOF ROLL AND EXITED RWY 23 AT TXWY E; BASICALLY OUT OF CTL. HE SAW ACFT Z; FACING HIM OPPOSITE DIRECTION ON TXWY A AND VEERED TO AVOID HIM. THIS PUT HIM ON COLLISION COURSE WITH ACFT Y; WHO WAS JUST STARTING TO TAXI. ACFT X SPUN AROUND TO AVOID ACFT Y AND STOPPED APPROX 10 FT FROM HIM. I FOUND THIS OUT LATER FROM THE PLTS; THIS AREA OF RAMP IS NOT VISIBLE FROM THE TWR. I CALLED ARPT CRASH FIRE RESCUE WHEN I OBSERVED ACFT X LEAVING THE RWY. THE DISPATCHER WAS INEXPERIENCED AND SLOW TO ACKNOWLEDGE. BY THE TIME CRASH FIRE RESCUE HAD RESPONDED AND WAS APCHING THE RWY TO CROSS; THE ACFT X PLT STATED HE WAS OK AND WANTED TO TAXI BACK TO HIS RAMP. I APPROVED THE TAXI; ADVISED CRASH FIRE RESCUE THEY WERE NOT NEEDED; AND HAD A FIELD TRUCK CHK THE RWY FOR FOD. THE PLT OF THE ACFT Y WAS SURPRISED BY THIS AND EXPLAINED HOW CLOSE ACFT X HAD COME TO HIM. IN HINDSIGHT; HE WAS CORRECT. I SHOULD HAVE KEPT ACFT X WHERE HE WAS AND HAD CRASH FIRE RESCUE INSPECT THE ACFT. AT THE TIME I DIDN'T KNOW HOW CLOSE IT WAS AND I WAS TRYING TO GET ACFT X TO HIS GATE. AFTER TALKING TO ACFT Y PLT; I REQUESTED RELIEF FROM POS. IT WAS OVER 1 HR BEFORE RELIEF WAS FINALLY PROVIDED. AS THE PROX SUNK IN; I THINK MY PERFORMANCE SUFFERED. RELIEF WAS AVAILABLE AND SHOULD HAVE BEEN PROVIDED SOONER.