Narrative:

I had air carrier X DH7 depart phl swbound climbing to 5000 ft. About 7500 ft west of phl, I had turned the DH7 wbound towards his first fix and climbed him to his final altitude of 8000 ft. He requested a deviation around WX in the south of him and wanted a turn to the northwest. I approved it and had to get a pointout from an adjacent controller because he would fly into his airspace. I then gave a relief briefing to another controller. In the middle of the briefing air carrier Y, B75 departed phl southwest off runway 27 on a 255 degree heading. I did not respond to him initially because I was still giving the briefing. I almost finished the brief when the relieving controller was told to unplug and another controller was told to relieve me. I then responded to the B735 to climb to 10000 ft (our highest departure altitude). I then started giving the 2ND briefing and midway through the briefing, the B735 said he would like to turn east (his direction of flight). I then recognized that the B735 was about 1 1/2 mi behind the DH7 and about 500 ft apart. I stopped the B735 altitude at 7000 ft, turned him eastbound, and issued traffic. I believe that the deviation around WX and issuing 2 relief briefing contributed to the situation.

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Original NASA ASRS Text

Title: ACR Y CLB THROUGH OCCUPIED ALT HAD LTSS FROM ACR X. SYS ERROR.

Narrative: I HAD ACR X DH7 DEPART PHL SWBOUND CLBING TO 5000 FT. ABOUT 7500 FT W OF PHL, I HAD TURNED THE DH7 WBOUND TOWARDS HIS FIRST FIX AND CLBED HIM TO HIS FINAL ALT OF 8000 FT. HE REQUESTED A DEV AROUND WX IN THE S OF HIM AND WANTED A TURN TO THE NW. I APPROVED IT AND HAD TO GET A POINTOUT FROM AN ADJACENT CTLR BECAUSE HE WOULD FLY INTO HIS AIRSPACE. I THEN GAVE A RELIEF BRIEFING TO ANOTHER CTLR. IN THE MIDDLE OF THE BRIEFING ACR Y, B75 DEPARTED PHL SW OFF RWY 27 ON A 255 DEG HDG. I DID NOT RESPOND TO HIM INITIALLY BECAUSE I WAS STILL GIVING THE BRIEFING. I ALMOST FINISHED THE BRIEF WHEN THE RELIEVING CTLR WAS TOLD TO UNPLUG AND ANOTHER CTLR WAS TOLD TO RELIEVE ME. I THEN RESPONDED TO THE B735 TO CLB TO 10000 FT (OUR HIGHEST DEP ALT). I THEN STARTED GIVING THE 2ND BRIEFING AND MIDWAY THROUGH THE BRIEFING, THE B735 SAID HE WOULD LIKE TO TURN E (HIS DIRECTION OF FLT). I THEN RECOGNIZED THAT THE B735 WAS ABOUT 1 1/2 MI BEHIND THE DH7 AND ABOUT 500 FT APART. I STOPPED THE B735 ALT AT 7000 FT, TURNED HIM EBOUND, AND ISSUED TFC. I BELIEVE THAT THE DEV AROUND WX AND ISSUING 2 RELIEF BRIEFING CONTRIBUTED TO THE SIT.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.