DIFFICULTIES IN INSTALLING A TARDY REPROGRAMMING OF THE RNAV APPROACH RESULTS IN CE68 FLIGHT CREW FAILING TO MAKE THE CROSSING RESTRICTION AT THE FAF.

Narrative

WE WERE ENRTE TO DTS AND SHORTLY BEFORE BEING HANDED OFF FROM JAX ARTCC TO EGLIN APCH CTL WE WERE ON VECTORS AND THEN CLRED DIRECT TO THE ARPT. AT THAT POINT; I PUNCHED DORECT TO DTS (1ST MISTAKE). SHORTLY THEREAFTER; WE WERE HANDED OFF TO EGLIN APCH CTL AND WERE CLRED FOR THE RNAV (GPS) RWY 14 APCH. THE FMS HAD PREVIOUSLY BEEN PROGRAMMED FOR THIS APCH. THE PNF THEN ATTEMPTED TO REPROGRAM THIS APCH AND WAS UNSUCCESSFUL. I; THE PF; THEN ATTEMPTED TO REPROGRAM THE APCH AND WAS ALSO UNSUCCESSFUL. I THEN ASKED THE PNF TO ENTER ILOPE; THE IAF; WHICH HE DID AND WE PROCEEDED TO THAT FIX TO BEGIN THE APCH. HOWEVER; NOZEC; THE FAF AT 3.6 NM; WAS NOT ENTERED INTO THE FMS (ANOTHER MISTAKE). WE CROSSED ILOPE APPROX 500 FT ABOVE THE PRESCRIBED ALT OF 2000 FT. AT THIS POINT WE WERE DSNDING AND PNF WAS ATTEMPTING TO FIGURE WHERE THE 3.6 MI FIX WAS INSTEAD OF PROGRAMMING IT INTO THE FMS. SINCE THE VNAV FUNCTION WAS QUESTIONABLE AT THIS POINT; I SWITCHED OFF THE AUTOPLT AND BEGAN TO FLY THE AIRPLANE BY HAND. DURING THIS TIME I FAILED TO MONITOR THE ALT AND RATE OF DSCNT AND DSNDED TO APPROX 1200 FT AGL PRIOR TO XING NOZEC (1600 FT IS THE PRESCRIBED XING ALT) PRIOR TO DSCNT TO MDA. WHEN THE PNF NOTED THE ALT; I IMMEDIATELY ARRESTED THE DSCNT AND HELD THIS ALT UNTIL XING WHAT WE EXPECTED TO BE NOZEC. I THEN BEGAN A 500 FPM RATE OF DSCNT AND WE BEGAN TO GET GND CONTACT. WE BROKE OUT UNDER A RAGGED CEILING AT 900-1000 FT AGL WITH BETTER THAN 5 MI VISIBILITY AND APPROX 2 MI FROM THE END OF THE RWY. WE WERE CONFIGURED TO LAND AND A LNDG WAS SUCCESSFULLY ACCOMPLISHED WITH A STRONG XWIND FROM THE L. AT NO TIME DID WE DSND BELOW MDA UNTIL THE RWY WAS IN SIGHT AND THE LNDG WAS ASSURED. WE CANCELED IFR WITH EGLIN APCH ONCE WE WERE ON THE GND. IN RETROSPECT I FEEL THE FOLLOWING MISTAKES WERE MADE AND LESSONS WELL LEARNED: 1) DUE TO FAMILIARITY WITH THIS APCH; BOTH PLTS WERE COMPLACENT; NO ADEQUATE APCH BRIEFING WAS GIVEN. HAD THIS NOT BEEN THE CASE; I BELIEVE THAT NOZEC WOULD HAVE BEEN PROGRAMMED INTO THE FMS EVEN IF THE REST OF THE PROC WAS NOT. 2) AFTER FIRST UNSUCCESSFUL ATTEMPT TO REPROGRAM THE CORRECT APCH PROC; A REQUEST FOR VECTORS OR HOLDING SHOULD HAVE BEEN MADE UNTIL THE REPROGRAMMING ISSUE WAS RESOLVED. IN LIEU OF THIS; A MISSED APCH SHOULD HAVE BEEN CALLED AND INITIATED WHEN THE EXCESSIVE DSCNT BECAME APPARENT. EITHER PLT COULD HAVE CALLED FOR THIS; FAILURE TO DO SO REFLECTS POOR CRM. 3) BOTH PLTS STILL FAIL TO UNDERSTAND WHY NEITHER WAS ABLE TO REPROGRAM THE FMS. A THOROUGH EXAM OF THE FMS MANUAL WILL BE CONDUCTED TO ANSWER THIS QUESTION. BOTH CREWMEN ARE EXPERIENCED IN THIS ACFT AND THIS PROB HAD NOT BEEN ENCOUNTERED PRIOR TO THIS OCCASION. 4) BOTH PLTS SHOULD NOT HAVE BEEN ATTEMPTING TO SOLVE THE FMS PROB AT THE SAME TIME; BEFORE PF ATTEMPTED TO REPROGRAM HE SHOULD HAVE TURNED CTL OF THE ACFT TO PNF. AT THIS POINT ATTN TO THE FMS BECAME MORE IMPORTANT THAN FLYING THE AIRPLANE. THIS SHOULD NEVER HAVE HAPPENED. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: REPORTER WAS STILL UNCERTAIN AS TO WHY THE APPROACH COULD NOT BE REINSTALLED. HE STATED THAT THE FLIGHT CREW WAS GETTING BEHIND THE AIRPLANE AND FELT IT WAS MOST LIKELY THAT BOTH PILOTS WERE MAKING ERRORS OUT OF HASTE. THE EVENT OCCURRED BECAUSE THE FLIGHT WAS PREVIOUSLY CLEARED DIRECT TO THE AIRPORT BY ARTCC AND WHEN THAT CLEARANCE WAS INSTALLED AND EXECUTED IN THE FMS ALL PRIOR WAYPOINTS WERE ERASED; INCLUDING THOSE ASSOCIATED WITH THE PREVIOUSLY INSTALLED RNAV RWY 14 IAP.