Narrative:

Approaching civit intersection our arrival was changed from the civet to the mitts arrival with instructions for intercepting the runway 24R localizer. The FMS was programmed (I thought) for the mitts and we were cleared for that arrival. Approaching mitts intersection, my co-pilot advised me that it looked as if the aircraft was not properly descending. I checked the HSI at the same time as a flight attendant entered the cockpit and I misinterpreted the display as being ok. It wasn't. We crossed mitts about 600 ft high. I reestablished the correct vertical path and noticed that the 'exec' light on the FMS was illuminated. This arrival is a relatively new and not often used procedure. This incident resulted from the last minute change in arrival, a possible error in programming the FMS, an interruption in the cockpit, and my unfamiliarity with the procedure.

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Original NASA ASRS Text

Title: B767-200 ACFT ON STAR ARRIVAL WAS GIVEN A NEW STAR. FLT CREW PROGRAMMED FMS FOR THE NEW ARRIVAL, BUT DIDN'T MAKE THE CROSSING RESTRICTION ON THE NEW ARRIVAL.

Narrative: APPROACHING CIVIT INTXN OUR ARRIVAL WAS CHANGED FROM THE CIVET TO THE MITTS ARRIVAL WITH INSTRUCTIONS FOR INTERCEPTING THE RWY 24R LOCALIZER. THE FMS WAS PROGRAMMED (I THOUGHT) FOR THE MITTS AND WE WERE CLRED FOR THAT ARRIVAL. APPROACHING MITTS INTXN, MY CO-PLT ADVISED ME THAT IT LOOKED AS IF THE ACFT WAS NOT PROPERLY DSNDING. I CHECKED THE HSI AT THE SAME TIME AS A FLT ATTENDANT ENTERED THE COCKPIT AND I MISINTERPRETED THE DISPLAY AS BEING OK. IT WASN'T. WE CROSSED MITTS ABOUT 600 FT HIGH. I REESTABLISHED THE CORRECT VERT PATH AND NOTICED THAT THE 'EXEC' LIGHT ON THE FMS WAS ILLUMINATED. THIS ARRIVAL IS A RELATIVELY NEW AND NOT OFTEN USED PROC. THIS INCIDENT RESULTED FROM THE LAST MINUTE CHANGE IN ARRIVAL, A POSSIBLE ERROR IN PROGRAMMING THE FMS, AN INTERRUPTION IN THE COCKPIT, AND MY UNFAMILIARITY WITH THE PROC.

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.