Narrative:

I was the first officer on a flight from oak to sna, and was the PNF. Our routing was the skyline 3 departure, flw transition and the tandy 2 arrival into sna. On our arrival into sna we were given a pilot's discretion to FL240. The captain initiated a slow descent and I informed him that I was leaving the frequency to get the sna ATIS and get gate information from our company. My VOR was tuned to sxc and the captain's was tuned to fim in order to intercept the 148 degree radial. Approximately 2-3 mins after I returned to center frequency the captain exclaimed 'uh-oh,' deployed the speed brake and started a steep high speed descent. I looked at the altitude alerter and noticed 14000 ft set. I saw our altitude passing FL180 and that we were 31 mi south of fim. I asked the captain if we were given a crossing restr at merma of 14000 ft and he said yes. We missed our restr by over 4000 ft. I think it is obvious that both the captain and I failed to use proper communications and situational awareness. When I returned to the frequency, I should have scanned all of the instruments and asked if there were any changes. The captain should have notified me of any changes from center without any prompting from me. In the future, I plan to double check all clrncs with the captain to avoid this type of situation. For the captain's part, he needs to be more aware of which VOR he is navigating on and ensure his current location in reference to all intxns and possible crossing restrs.

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Original NASA ASRS Text

Title: MLG FLC FAILS TO START DSCNT IN TIME, MISSES XING RESTR BY 4000 FT.

Narrative: I WAS THE FO ON A FLT FROM OAK TO SNA, AND WAS THE PNF. OUR ROUTING WAS THE SKYLINE 3 DEP, FLW TRANSITION AND THE TANDY 2 ARR INTO SNA. ON OUR ARR INTO SNA WE WERE GIVEN A PLT'S DISCRETION TO FL240. THE CAPT INITIATED A SLOW DSCNT AND I INFORMED HIM THAT I WAS LEAVING THE FREQ TO GET THE SNA ATIS AND GET GATE INFO FROM OUR COMPANY. MY VOR WAS TUNED TO SXC AND THE CAPT'S WAS TUNED TO FIM IN ORDER TO INTERCEPT THE 148 DEG RADIAL. APPROX 2-3 MINS AFTER I RETURNED TO CTR FREQ THE CAPT EXCLAIMED 'UH-OH,' DEPLOYED THE SPD BRAKE AND STARTED A STEEP HIGH SPD DSCNT. I LOOKED AT THE ALT ALERTER AND NOTICED 14000 FT SET. I SAW OUR ALT PASSING FL180 AND THAT WE WERE 31 MI S OF FIM. I ASKED THE CAPT IF WE WERE GIVEN A XING RESTR AT MERMA OF 14000 FT AND HE SAID YES. WE MISSED OUR RESTR BY OVER 4000 FT. I THINK IT IS OBVIOUS THAT BOTH THE CAPT AND I FAILED TO USE PROPER COMS AND SITUATIONAL AWARENESS. WHEN I RETURNED TO THE FREQ, I SHOULD HAVE SCANNED ALL OF THE INSTS AND ASKED IF THERE WERE ANY CHANGES. THE CAPT SHOULD HAVE NOTIFIED ME OF ANY CHANGES FROM CTR WITHOUT ANY PROMPTING FROM ME. IN THE FUTURE, I PLAN TO DOUBLE CHK ALL CLRNCS WITH THE CAPT TO AVOID THIS TYPE OF SIT. FOR THE CAPT'S PART, HE NEEDS TO BE MORE AWARE OF WHICH VOR HE IS NAVING ON AND ENSURE HIS CURRENT LOCATION IN REF TO ALL INTXNS AND POSSIBLE XING RESTRS.

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.