A C560 CREW; ON APCH TO KAUO; FLEW A GPS ONLY APCH; LOC WAS OTS.

Narrative

UPON RETURNING TO AUBURN; AL; THE WX WAS RPTED BY AWOS AS 400 FT OVCST AND 10 MI VISIBILITY; WINDS FROM THE S AT 8-10 KTS. THE APCHS AT AUBURN ARE: LOC; VOR/DME-A; GPS; NDB. THE LOC HAS BEEN DECOMMISSIONED BUT OUR FMS HAS THE APCH IN THE DATABASE. THE CAPT ELECTED TO SHOOT THE LOC RWY 36; USING THE FMS DATABASE AS PRIMARY MEANS OF NAV. I TOLD HIM THAT WE COULD NOT DO IT BECAUSE THE FMS (IN THAT INSTANCE) CAN BE USED ONLY AS A BACK-UP. HE SAID IT WAS LEGAL TO DO THE LOC APCH SINCE IT WAS IN THE DATABASE AND HAD A 'G' NEXT TO IT; MEANING GPS. I ARGUED AGAIN BUT HE DECIDED TO STICK TO THAT APCH ANYWAY. INBOUND TO THE RWY; THE WX HAD IMPROVED AND WE ENDED UP SEEING THE RWY WELL BEFORE MINIMUMS. THERE NEEDS TO BE MORE EMPHASIS ON THE DIFFERENCE BTWN A GPS OVERLAY AND A 'FULL BLOWN' GPS APCH SUCH AS A VOR OR GPS APCH. CALLBACK CONVERSATION WITH A 'KAUO' ARPT OPS SPECIALIST REVEALED THE FOLLOWING INFO: THE LOC FOR RWY 36 WAS SHUT DOWN ON DEC/4/00 DUE TO RWY CONSTRUCTION. THE LENGTH OF RWY 18/36 WAS INCREASED TO 5265 FT. UNSURE WHEN THE LOC WILL BE BACK IN SVC.