A C560 crew, on approach to kauo, flew a GPS only approach, localizer was OTS.

Attributes
ACN	536633
Time
Date	200201
Day	Thu
Local Time Of Day	0001 To 0600
Place
Locale Reference	airport : aoo.airport
State Reference	AL
Altitude	msl single value : 2600
Environment
Flight Conditions	IMC
Light	Night
Aircraft 1
Controlling Facilities	artcc : ztl.artcc tower : mke.tower
Operator	general aviation : personal
Make Model Name	Citation V
Operating Under FAR Part	Part 91
Navigation In Use	other
Route In Use	approach : instrument non precision
Flight Plan	IFR
Person 1
Affiliation	other
Function	flight crew : first officer
Qualification	pilot : cfi pilot : atp pilot : multi engine
Experience	flight time last 90 days : 150 flight time total : 3100 flight time type : 460
ASRS Report	536633
Person 2
Affiliation	other
Function	flight crew : captain oversight : pic
Events
Anomaly	non adherence : published procedure non adherence : far other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : anomaly accepted
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Upon returning to auburn, al, the WX was reported by AWOS as 400 ft overcast and 10 mi visibility, winds from the south at 8-10 KTS. The approachs at auburn are: localizer, VOR/DME-a, GPS, NDB. The localizer has been decommissioned but our FMS has the approach in the database. The captain elected to shoot the localizer runway 36, using the FMS database as primary means of navigation. 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 localizer approach 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 approach anyway. Inbound to the runway, the WX had improved and we ended up seeing the runway well before minimums. There needs to be more emphasis on the difference between a GPS overlay and a 'full blown' GPS approach such as a VOR or GPS approach. Callback conversation with a 'kauo' airport operations specialist revealed the following information: the localizer for runway 36 was shut down on dec/4/00 due to runway construction. The length of runway 18/36 was increased to 5265 ft. Unsure when the localizer will be back in service.

Original NASA ASRS Text

Title: 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.

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.