PHL LCL CTLR EXPERIENCED AN OPERROR AS SECOND DEP ACFT OVERTOOK FIRST ACFT AT APPROX 4000 FT.

Narrative

PHL ON RWY 27L. JETS DEPART ON A 255 DEG HDG. ACR X; A B717; DEPARTED RWY 27L AND CLBED TO 5000 FT ON A 255 DEG HDG. NEXT DEP WAS AN ACR Y JET THAT CLBED TO 5000 FT ON A 255 DEG HDG. ACR X WAS 6 MI W AT 4000 FT AND NOT TALKING TO ND BUT WAS ON LW'S FREQ. I WAS WORKING SD. I WAS BUSY WORKING OTHER TFC AND DIDN'T GET TO TALK TO ACR Y UNTIL 4 MI 2 AT APPROX 4200 FT. ND TOLD ME TO TURN ACR Y AND I DID IMMEDIATELY TO TURN AWAY FROM THE B717. THE TURN INCREASED THE SEPARATION. SUPPLEMENTAL INFO FROM ACN 669942: WHILE WORKING THE N DEP POS AT PHL; I OBSERVED AN ACR X B717 DEPART RWY 27L ON A 255 DEG HDG FOR VECTORS TO HIS FIRST DEP FIX IN MY AIRSPACE. AS THE ACFT CLBED THROUGH 4000 FT FOR 5000 FT; I REALIZED THE ACFT WAS NOT ON MY FREQ AFTER REPEATED ATTEMPTS TO CONTACT HIM. IT WAS AT THIS TIME I OBSERVED THE BE40 DEPART PHL ON THE SAME HDG. AFTER CONTACTING THE LCL CTLR TO SEE WHERE ACR X WAS; I DISCOVERED HE WAS STILL ON THE LCL CTLR'S FREQ. MY INTENT WAS TO GET CTL OF ACR X TO TURN HIM ON COURSE AWAY FROM THE BE40 THAT WAS CLOSING.