A CAPT'S AND FO'S RPT ON AN ALT OVERSHOOT ON DSCNT THAT DEALS WITH THE ALT CALLOUT PROC AND HOW IT FAILED THIS CREW DURING A CLRNC MISINTERP.

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FO WAS FLYING. CTR SAID DSND AND MAINTAIN 6000 FT. I READ THE CLRNC BACK TO MAINTAIN 6000 FT AND SET THE ALT BUG. THE FO DSNDED TO 5000 FT. AS WE DSNDED THROUGH 6000 FT; THE FO CALLED OUT ALT. I SAID OUT OF 7000 FT FOR 6000 FT; NOT REALIZING THE ALTIMETER WAS READING 6000 FT. I FEEL THE FO MISUNDERSTOOD THE CLRNC AND OUT OF HABIT I JUST CALLED OUT WHAT I WAS EXPECTING TO SEE; AND DID NOT PROPERLY READ THE ALTIMETER. SUPPLEMENTAL INFO FROM ACN 411844: CAPT ACKNOWLEDGED RADIO CALLED AND SET ALT BUG TO 6000 FT (FO CANNOT SEE THIS BUG). PASSING THROUGH 6000 FT FOR 5000 FT; FO CALLED 1000 FT TO GO AND CAPT ACKNOWLEDGED. AFTER LEVELING AT 5000 FT; CAPT ASKED WHY WE WERE THERE (ALT). HE SAID WE WERE CLRED ONLY TO 6000 FT AND SAID TO STAY THERE AND SEE IF ATC SAYS SOMETHING. THEY NEVER DID. CTR SWITCHED US TO APCH AND THEY CLRED US DOWN TO 3000 FT WITH NO QUESTION IN ALT. NORMALLY THIS LOCATION WHERE OUR QUESTION ON ALT WAS IS CLRED TO 6000 FT. BIG QUESTION ON WHO WAS RIGHT. IN THE FUTURE; I WILL WRITE DOWN ALT AND HDG CLRNCS EVEN IF THE CAPT WILL NOT. ALSO; I WILL GET CLARIFICATION FROM ATC IF THERE IS A QUESTION.