LOST COM AND NAV RADIOS IN VICINITY OF DEST ARPT. RPTR ACFT WAS SQUAWKING APPROPRIATE CODES ON XPONDER; BUT RPTR NOT SURE THEY WERE WORKING EITHER. RPTR DIDN'T KNOW LOST COM PROC FOR TWR FLY-BY AND GREEN LIGHT.

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ON DSCNT INTO WICHITA BOTH COM AND BOTH NAV WERE LOST. WE USED OUR LORAN-BF GOODRICH 6000 TO FIND THE ICT VOR; AND DSNDING TO VFR CONDITIONS; SQUAWKING FIRST 1200; THEN 7600; WE APCHED THE ARPT; ALTHOUGH UNABLE TO SEE GREEN LIGHT FROM TWR; SAW EMER VEHICLES ALONG RWY; PROCEEDED TO LAND. SUGGESTION -- A GREEN LIGHT AT THE BEGINNING OF RWY ANGLED UP THE GS WOULD GIVE UNCERTAIN PLT CONFIDENCE TO LAND IN EMER. A RED LIGHT IN A DIFFERENT CONFIGN THAN THE RWY APCH LIGHTS WOULD ALSO WORK. BOTH OF THEM COULD BE CTLED BY THE TWR. UPON LNDG WERE ABLE TO SEE A GREEN LIGHT FROM THE TWR FOR US TO TAXI IN. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: ACFT TYPE WAS CITATION 1. THE LORAN-BF GOODRICH 6000 RPTR USED FOR NAV IS A LONG RANGE NAV SYS. RPTR WAS BRINGING THE ACFT TO CESSNA SVC CTR FOR SVC AND TRIED TO FIND THE CAUSE OF THEIR COM AND NAV FAILURES. THE COMPANY EITHER DIDN'T KNOW OR WAS RELUCTANT TO TELL HIM. IT MAY HAVE BEEN RELATED TO A RELAY ON THE EMER BUS. RPTR DIDN'T KNOW THE PROC FOR ESTABLISHING CONTACT WITH THE TWR WITH LOST COM. HE WASN'T SURE THAT ANYONE KNEW ABOUT THEIR PROB BECAUSE; THOUGH SQUAWKING EMER XPONDER CODE; HE DIDN'T KNOW IF IT WAS WORKING. THEY ASSUMED THAT THE ARPT KNEW OF THEIR PROB WHEN THEY SAW THE EMER EQUIP STANDING BY THE RWY. BUT; THEN RPTR ASSUMED THAT THE TWR SHOULD HAVE GIVEN THEM A GREEN LIGHT TO LAND. THIS ANALYST ADVISED THE RPTR THAT; THOUGH THE TWR MAY BE ALERTED THAT HE WAS COMING; THEY MAY NOT HAVE HAD XPONDER INFO IN THE TWR AND CONSEQUENTLY PROBABLY DIDN'T REALLY KNOW HE WAS THERE UNTIL AFTER HE LANDED. AFTER LNDG THE TWR DID GIVE THE GREEN LIGHT FOR TAXI. RPTR WAS COUNSELED THAT THE PROC FOR LOST COM WOULD BE TO FLY BY THE TWR WITH THE LNDG GEAR DOWN AND WAGGLE THE WINGS. THEN THE ACFT TURNS DOWNWIND AND WATCHES THE TWR FOR A GREEN LIGHT. HE SAID HE DIDN'T FEEL COMFORTABLE FLYING BY THE TWR IN A HIGH PERFORMANCE ACFT; BUT AGAIN HE WAS ASSURED THAT IT IS NOT A PROB AND IS THE ONLY WAY THAT BOTH THE FLC AND TWR KNOW THAT THEY HAVE LNDG CLRNC.