A COMMUTER AIRLINE FLC WAS DISTR BY TASKS; AND FAILED TO COMPLY WITH THE ASSIGNED XING RESTR.

Narrative

I WAS GIVEN A XING RESTR AT STORY INTXN; CROSS STORY AT 8000 FT. I HAD STARTED DOWN OUT OF 12000 FT IN PLENTY OF TIME (AND DISTANCE) TO CROSS STORY AT 8000 FT. HOWEVER; AS WE GOT CLOSE TO STORY; THINGS STARTED TO GET BUSY. THE FO WAS ON THE #2 RADIO WITH COMPANY; ATC GAVE US A FREQ CHANGE; WHICH I TOOK CARE OF; AND WE HIT SOME TURB. THESE THINGS TOOK MY MIND OFF THE XING RESTR. AS I WAS SLOWING DOWN BECAUSE OF THE TURB I HAD ALSO SLOWED THE DSCNT RATE. WHEN I REMEMBERED THE XING RESTR IT WAS TOO LATE. I CROSSED STORY 500-600 FT TOO HIGH. SUPPLEMENTAL INFO FROM ACN 304013: WHILE APCHING ORD ARPT (AT 12000 FT) ON THE PULLMAN 3 ARR; WE WERE INSTRUCTED BY ZAU TO CROSS STORY INTXN AT 8000 FT. I CHKED IN WITH ORD APCH AND ADVISED THEM THAT WE WERE DSNDING TO 8000 FT. THEN I GAVE APCH FREQ TO THE CAPT; AND I STARTED TO LISTEN/COPY ATIS AND RUN THROUGH OUR IN-RANGE AND DSCNT CHKLISTS. UPON COMPLETION OF THESE TASKS; I FOCUSED MY ATTN TO THE NAVAIDS AND ALTIMETER. THIS IS WHEN I REALIZED THAT WE HAD PASSED STORY INTXN AND WERE STILL AT 8600 FT. I BROUGHT THIS TO THE ATTN OF THE CAPT; HE SEEMED TO REALIZE THE SIT AS I SPOKE.