BEECH 400 CPR JET FLC FAILED TO LEVELOFF AT THEIR SIGNED INTERMEDIATE ALT DURING CLBOUT FROM A NON CTLED ARPT.

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I AM EMPLOYED AS A SIC ON A BE400A. AS I AM TYPED IN THE ACFT; IT IS COMPANY POLICY FOR THE PLTS TO SWAP SEATS EVERY OTHER LEG. FOR OUR LEG DEPARTING RUQ; I WAS IN THE L SEAT; THE PIC IN THE R. WHILE WE TAXIED TO RWY 2 (UNCTLED FIELD); HE CONTACTED CLT CLRNC; AND I LISTENED TO THE AWOS. I HEARD JUST BITS AND PIECES OF HIS XMISSION; IN WHICH HE ADVISED CLT CLRNC THAT THEIR XMISSION HAD BEEN PARTIALLY BLOCKED; AND HE ASKED THEM TO FILL IN THE PORTIONS HE MISSED. HE ADVISED ME THAT OUR CLRNC WAS A L TURN TO 270 DEGS AND A CLB TO FL270. I CHALLENGED THAT ALT; AS IT SEEMED HIGH FOR AN INITIAL. MY PIC SAID HE WAS CERTAIN THAT THIS ALT (FL270) WAS CORRECT. AGAIN; I TOLD HIM THAT IT SEEMED INCORRECT TO ME. MY PIC BECAME ADAMANT THAT HE WAS CORRECT; SO I BACKED OFF. (WE HAD FILED FOR FL270 AS A FINAL.) WE DEPARTED RWY 2; TURNED L TO 270 DEGS; AND BEGAN OUR CLB. THE FREQ WAS CONGESTED AND BY THE TIME THE PIC WAS ABLE TO REACH CLT APCH/DEP; WE WERE CLBING THROUGH 5000 FT. THE CTLR ADVISED US THAT WE HAD BEEN ASSIGNED 3000 FT AS AN INITIAL ALT. HE THEN CLRED US TO 14000 FT. MY PIC ADVISED ATC THAT OUR FIRST CLRNC HAD BEEN BLOCKED; BUT HE HAD SUBSEQUENTLY RECEIVED ONLY FL270 AS AN ASSIGNED ALT. LESSONS LEARNED: 1) DON'T LET A LAZY FELLOW CREW MEMBER DICTATE YOUR BEHAVIOR. IF A XMISSION IS BLOCKED; ASK FOR A FULL RE-XMISSION. 2) IF YOUR GUT TELLS YOU SOMETHING DOESN'T SOUND RIGHT; INSIST THAT YOUR FELLOW CREW MEMBER (EVEN IF THEY'RE THE PIC) RECHKS THE ITEM IN QUESTION.