B757-200 CREW LANDED AT MMPR WITHOUT CONTACTING THE TWR FOR CLRNC. THE FO WAS ON HIS FIRST LNDG ON IOE.

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IT WAS MY SECOND LEG ON THE B757. MY FIRST AS PF. IT WAS MY FIRST DAY OF IOE; AS WELL AS THE FIRST TIME I HAD FLOWN INTO MEXICO. WX CONDITIONS AT MMPR (PUERTO VALLARTA; MEXICO) WERE VFR. THE CAPT AND I HAD BRIEFED THE VOR RWY 22 APCH AND DISCUSSED HOW I SHOULD CONFIGURE AND EXECUTE THE APCH. AFTER COMMENCING THE APCH AND FLYING THE ARC AROUND TO THE FINAL APCH COURSE; WE HAD A VISUAL ON THE RWY AND RPTED THE FIELD IN SIGHT. WE WERE THEN CLRED THE VISUAL APCH TO RWY 22. I TRANSITIONED THE ACFT TO AN EXTENDED FINAL AND CONTINUED TO FLY AND CONFIGURE WITH THE AUTOPLT DISENGAGED. WE COMPLETED OUR FINAL APCH CHKS AND MADE A STABILIZED APCH TO AN UNEVENTFUL FIRST LNDG IN THE B757. AS WE BEGAN TO EXIT THE RWY; APCH CTL ADVISED US TO CONTACT THE TWR ON 118.5. AT THIS POINT; I THOUGHT WE HAD NEVER BEEN TOLD TO CONTACT THE TWR BEFORE LNDG; OR HAD MISUNDERSTOOD THE APCH CTLR. I WAS CONCERNED BECAUSE I FELT WE MAY HAVE JUST LANDED WITHOUT A LNDG CLRNC. WE CONTACTED THE TWR AND THEY CLRED US TO TAXI TO THE GATE. WE FINISHED OUR AFTER LNDG CHKS AND TAXIED TO THE RAMP AND PARKED. I DON'T KNOW FOR SURE IF WE EVER HAD CLRNC TO LAND; FOR WE NEVER CONTACTED THE TWR UNTIL AFTER LNDG. I DON'T KNOW FOR SURE IF THE APCH CTLR ADVISED US TO CONTACT THE TWR PRIOR TO LNDG. NO OTHER TFC WAS IN THE AREA; ON THE GND OR IN THE AIR AT THE TIME OF OUR ARR. I BELIEVE MANY FACTORS COULD HAVE CONTRIBUTED TO THIS POSSIBLE EVENT. BEING MY FIRST TIME IN MEXICAN AIRSPACE; I FOUND IT DIFFICULT TO UNDERSTAND THE CTLRS. SECOND; BEING MY FIRST LNDG IN THE AIRPLANE; I WAS VERY FOCUSED ON HOW I WAS GOING TO SET UP FOR THIS APCH AND LNDG; AS WELL AS GET A 'FEEL' FOR THE AIRPLANE. THIS WAS MY PRIMARY CONCERN AFTER BEING CLRED FOR THE VISUAL APCH. IF WE WERE INSTRUCTED TO CONTACT THE TWR FOR LNDG CLRNC; I MAY HAVE MISSED IT DUE TO MY CONCENTRATION ON FLYING THE AIRPLANE. IN THE FUTURE; I WILL BE EXTRA CAREFUL WHEN IT COMES TO LNDG CLRNCS. IN ADDITION TO HAVING GEAR DOWN AND LNDG FLAPS SELECTED ON FINAL; I DOUBLECHK LNDG CLRNC. I ALSO TURN ON THE NOSE GEAR LIGHT WHEN THE LNDG CLRNC IS ISSUED AS A REMINDER THAT WE ARE CLRED TO LAND.