GA FLT CREW HAS AN ALTDEV WHILE DEP YIP.

Narrative

I WAS PIC. CLRNC WAS TO TAKE OFF ON RWY 5R; CLB AND MAINTAIN 3000 FT MSL AND TURN L TO 300 DEGS. TKOF WAS NORMAL. TWR GAVE US A FREQ CHANGE TO DEP. BEFORE THE FO COULD CALL DEP; THE CTLR WAS CALLING US IN A VOICE THAT EXUDED URGENCY. THE CTLR SAID '(OUR ACFT); TURN R IMMEDIATELY TO 030 DEGS!' WE WERE PASSING A HEADING OF ABOUT 330 DEGS AT THIS TIME. THE FO CALLED 'OUT OF 2000 FT FOR 3000 FT;' WHICH I ACKNOWLEDGED. I IMMEDIATELY INITIATED A ROLL REVERSAL FROM ABOUT 20 DEGS L BANK TO 40 DEGS R BANK; ALL THE WHILE TRYING TO KEEP THE RIDE SMOOTH AND NOT SCARE THE 8 PAX BEHIND ME. THE ACFT WAS ACCELERATING AND THE THROTTLES WERE STILL AT CLB THRUST SINCE THIS MANEUVER WAS REQUIRING BOTH HANDS. THE FO COULDN'T REDUCE PWR FOR ME BECAUSE I HAD INSTRUCTED HIM TO 'BUG' ME AROUND TO 030 DEGS -- SINCE THE FLT DIRECTOR COMMAND BARS WERE BANKED L AND THE ACFT WAS NOW BANKED R. BEFORE I ARRESTED THE CLB; THE ACFT HAD REACHED 3400 FT OR 3500 FT. WE WERE TURNING TOWARD 4000 FT TFC AND ALTHOUGH I DON'T REMEMBER HEARING IT; THE FO TOLD ME THAT WE GOT A TA ON THE TCASII. WE DID NOT GET AN RA. SHORTLY AFTER THIS; THE CTLR CALLED US AND ASKED US TO VERIFY LEVEL AT 3000 FT. BY THIS TIME WE WERE. THE FO ACKNOWLEDGED LEVEL AND THE CTLR CAME BACK AND EXPLAINED TO US THAT ANOTHER ACFT HAD DEPARTED A NEIGHBORING ARPT AND WAS REQUESTING HIS IFR CLRNC. THE CTLR RIGHTFULLY TURNED US AWAY FROM THIS ACFT WHILE HE SORTED OUT THE SIT. IT'S HARD TO IMAGINE THAT THE ACFT REQUESTING HIS IFR CLRNC WAS LEGAL SINCE WILLOW RUN WAS RPTING 700 FT OVCST AND 5 MI VISIBILITY; WHEN WE DEPARTED WE WERE SOLID IMC THROUGHOUT THIS OCCURRENCE. THIS IS MENTIONED ONLY TO CLARIFY THE FACTS AND NOT AS AN EXCUSE FOR THE ALTDEV. THE ACFT WAS ACCELERATING AND CLBING RAPIDLY; BUT THAT'S NO EXCUSE FOR NOT DOING A BETTER JOB. I WILL IN THE FUTURE.