AIR AMBULANCE ACFT MAKES APCH USING LORAN INSTEAD OF VOR AS FLAGS WERE UP. MISSES ILS CTRLINE TWICE. RADAR VECTORS.

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WE WERE CONDUCTING AN AIR AMBULANCE FLT FROM IDAHO FALLS; ID; TO O'HARE SO PATIENT AND 2 FLT NURSES COULD CATCH AN INTL FLT TO AMSTERDAM. THE PATIENT WAS NOT CRITICAL AND THEY HAD APPROX 2 HRS UNTIL DEP FROM O'HARE. WE WERE RECEIVING VECTORS AND DSCNT CLRNCS SO I TUNED IN THE ILS FOR RWY 14R AT O'HARE INTO BOTH MY NAV (COPLT; R SIDE) AND CAPT'S. CAPT WAS FLYING. SHORTLY AFTER SELECTING THE FREQ WE STILL HAD NAV FLAGS ON BOTH SIDES. CAPT THEN STATED TO ME THAT THIS WAS ONE OF THOSE ILS FREQS THAT OUR RADIOS COULD NOT RECEIVE. CHICAGO APCH THEN TOLD US TO TURN TO OUR LAST HDG FOR INTERCEPTING THE LOC COURSE AND TO CONTACT O'HARE TWR AT THE MARKER. I ACKNOWLEDGED THEIR XMISSION AND REMAINED ON THEIR FREQ. I ASKED THE CAPT IF WE COULD TELL APCH WE WERE NOT RECEIVING THE ILS. HE SAID NO; THAT HE COULD CONDUCT THE APCH USING THE ONBOARD LORAN. AT THIS POINT I STARTED BECOMING EXTREMELY CONCERNED. IT WAS VERY HAZY; THE ARPT WAS NOWHERE IN SIGHT AND WE REALLY HAD NO IDEA WHERE THE LOC COURSE OR THE MARKER WERE. I TRIED TUNING IN THE NDB BUT IT WAS NOT POINTING ANYWHERE CLOSE TO WHERE THE MARKER WAS. SHORTLY THEREAFTER CHICAGO APCH (O'HARE APCH) CAME BACK ON THE RADIO AND ADVISED US THAT WE HAD FLOWN THROUGH THE LOC COURSE AND TO TURN R TO REINTERCEPT. AT THIS POINT I TRIED TO REASON WITH THE CAPT BUT HE TOLD ME TO ACKNOWLEDGE THEIR XMISSION; SO I DID. SHORTLY AFTER THIS; APCH CAME BACK ON THE RADIO AND TOLD US THAT AGAIN WE HAD FLOWN THROUGH THE LOC COURSE AND TO REINTERCEPT. THEY SOUNDED CONCERNED SO THEY STATED THAT THE ARPT WAS 5 MI (APPROX) AHEAD. THEY THEN SAID TO CONTACT THE TWR AT THE MARKER. CAPT ADVISED ME HE HAD THE ARPT IN SIGHT AND TO TELL APCH; WHICH I DID. I COULD NOT MAKE OUT THE ARPT; IT SIMPLY WAS NOT IN SIGHT FROM MY SIDE. SOMEWHERE BTWN THAT LAST XMISSION AND FINALLY SIGHTING THE WRONG RWY; BUT O'HARE NONETHELESS; THE CAPT RESTATED HIS ABILITY TO SHOOT THE APCH USING THE LORAN. HOWEVER; WHEN WE FINALLY SIGHTED A RWY; IT WAS RWY 14L. AGAIN WE HAD BEEN CLRED FOR ILS RWY 14R. THE CAPT SAW RWY 14L AND STARTED PROCEEDING TOWARDS IT. I THEN SAW RWY 14R AND TOLD HIM TO PROCEED TOWARDS IT; THAT HE WAS GOING TOWARDS THE WRONG RWY. WHEN WE FINALLY GOT THE RWY 14L/R COMPLEX IN SIGHT WE WERE SMACK DAB IN THE MIDDLE BTWN THE 2 ILS COURSES/EXTENDED RWY CTRLINES. THE CAPT THEN SAID 'OH; THAT'S RIGHT; LORANS GO TOWARD THE CTR OF THE ARPT; NOT TO A PARTICULAR RWY.' I COULDN'T BELIEVE WHAT I WAS HEARING. WE HAD JUST FLOWN INTO THE WORLD'S BUSIEST ARPT WITHOUT A CLUE AS TO WHERE WE REALLY WERE. HE STATED TO ME ON THE APCH THAT HE DIDN'T WANT TO TELL APCH THAT WE COULD NOT RECEIVE THE ILS. HE DIDN'T WANT TO BE PUT INTO A HOLD. HE FELT THAT IF WE HAD ACKNOWLEDGED OUR PROB THAT THEY WOULDN'T LET US LAND EVEN THOUGH WE WERE OPERATING AS A LIFEGUARD FLT. AFTER LNDG I STATED MY OBJECTIONS TO WHAT HE HAD JUST DONE. HE TOLD ME THAT HE DIDN'T CARE. IT IS OBVIOUS THAT SOME CREW MEMBERS HAVE ALMOST NO REGARD FOR SAFETY AND THEY HAVE NO IDEA WHAT CREW COORD MEANS. HE WAS ENDANGERING THE LIVES OF POSSIBLY HUNDREDS OF PEOPLE AND EVEN AFTER BEING REMINDED OF THAT FACT; STILL DIDN'T SEEM TO CARE.