AN ACR LGT MAY HAVE LANDED WITHOUT CLRNC AT UIO.

Narrative

JUST PRIOR TO BEGINNING DSCNT; WE RECEIVED WX RPT OF BETTER THAN 10 MI VISIBILITY. APCH TOLD US WE WERE #1 AND TO EXPECT NO DELAY. THE WX CHANGED DURING THE COURSE OF OUR APCH WITH A FOG BANK DEVELOPING. THIS INFO NEVER WAS UNDERSTOOD BY US. THE CTLR DID PASS SOME WX INFO TO US; BUT THE COMBINATION OF LANGUAGE; CONCENTRATION ON A DIFFICULT APCH PROC; AND WE HAD A VISUAL ON THE FIELD FOR MOST OF THE APCH SO HIS INFO REALLY DIDN'T GET ACROSS TO US. WE CALLED THE FIELD IN SIGHT ABOVE MINIMUMS AND WERE TOLD THAT THE TWR DID NOT HAVE US IN SIGHT. WE TOLD THE CTLR THAT WE HAD A CLR VIEW OF THE RWY ENVIRONMENT AND REQUESTED CONFIRMATION OF LNDG CLRNC. THE CTLR STOPPED TALKING TO US. WE LANDED WITH NO PROB; ROLLED INTO MODERATE FOG PART WAY DOWN THE RWY AND THEN DISCOVERED THAT THE FIELD WAS CLOSED FOR WX. WITH THE INFO WE HAD PRIOR TO BEGINNING THE APCH; WX WAS NEVER EVEN CONSIDERED TO BE A CONSIDERATION UNTIL WE ENCOUNTERED THE FOG ON ROLLOUT. LANGUAGE CONTRIBUTED TO THE CONFUSION. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THIS WAS THE RPTR'S FIRST TRIP INTO QUITO. HE HAD NOT YET BECOME USED TO THEIR BRAND OF ENGLISH NOR THE CHANGEABLE WX. UIO TWR RPTED THE WX TO BE ONLY 2 KM WHILE THE ACFT WAS ON APCH; BUT 4 KM IS NEEDED FOR THE APCH. THIS INFO PASSED BY THE FLC AS THEY WERE ABLE TO SEE THE RWY ALL OF THE TIME. THE ACR'S GND PERSONNEL ASSURED THE FLC THAT THERE WAS NOTHING TO WORRY ABOUT FROM UIO ATC. THE RPTR HAS LEARNED SINCE THIS INCIDENT THAT THE WX AT UIO CAN CHANGE VERY RAPIDLY AS CLOUDS DRIFT BY. AS THE MAP PROC AT UIO IS 'AN EMER PROC IN ITSELF;' THE RPTR FEELS THAT IT IS SAFER TO LAND WITH SLIGHTLY REDUCED VISIBILITY THAN TO EXECUTE THE MAP.