Narrative:

After being turned on a short visual approach for runway 27R at fll by miami approach and cleared for a visual to runway 27R I thought my first officer went to fll tower and we were given clearance to land. Upon landing however, I hear miami approach giving heading/altitude changes to other aircraft. After rollout and turn off runway we go to ground control and they clear us to the gate -- no questions asked!! Now I'm not sure if we were cleared to land by tower or we had stayed on miami approach frequency. Miami approach was very busy and so were we with the short final, doing landing checklist, etc. At 500 ft AGL I always say '5 green lights and cleared to land.' I did this at 500 ft but now I'm not sure if we were ever cleared. I called the tower by telephone from the gate and was told there was no problem and everything was ok. They didn't have time to talk very long since there was a bomb threat taking place on the field at the same time!! Maybe the first officer inadvertently changed back to miami approach frequency from tower when putting in the ground frequency on the other radio control head. I would usually say the lesson learned was 'if not sure ask again' but we're not sure if we were cleared! No conflicts occurred since we were the only aircraft on final and no other aircraft were taking off or taxiing on that side of the field at that time. Supplemental information from acn 358540: we were on approach frequency during rollout. It seemed, however, to us that we had received a landing clearance, however, that key phrase 'cleared,' was given by approach to another aircraft. I feel we mistook 'cleared' to mean 'cleared to land.' I did have tower dialed into the other communication head.

Google
 

Original NASA ASRS Text

Title: B737-200 FLC IN AN UNCOORD UNAUTH LNDG. CLRNC LNDG NOT RECEIVED. STILL ON APCH CTL FREQ DURING LNDG PROC ROLLOUT.

Narrative: AFTER BEING TURNED ON A SHORT VISUAL APCH FOR RWY 27R AT FLL BY MIAMI APCH AND CLRED FOR A VISUAL TO RWY 27R I THOUGHT MY FO WENT TO FLL TWR AND WE WERE GIVEN CLRNC TO LAND. UPON LNDG HOWEVER, I HEAR MIAMI APCH GIVING HEADING/ALT CHANGES TO OTHER ACFT. AFTER ROLLOUT AND TURN OFF RWY WE GO TO GND CTL AND THEY CLR US TO THE GATE -- NO QUESTIONS ASKED!! NOW I'M NOT SURE IF WE WERE CLRED TO LAND BY TWR OR WE HAD STAYED ON MIAMI APCH FREQ. MIAMI APCH WAS VERY BUSY AND SO WERE WE WITH THE SHORT FINAL, DOING LNDG CHKLIST, ETC. AT 500 FT AGL I ALWAYS SAY '5 GREEN LIGHTS AND CLRED TO LAND.' I DID THIS AT 500 FT BUT NOW I'M NOT SURE IF WE WERE EVER CLRED. I CALLED THE TWR BY TELEPHONE FROM THE GATE AND WAS TOLD THERE WAS NO PROB AND EVERYTHING WAS OK. THEY DIDN'T HAVE TIME TO TALK VERY LONG SINCE THERE WAS A BOMB THREAT TAKING PLACE ON THE FIELD AT THE SAME TIME!! MAYBE THE FO INADVERTENTLY CHANGED BACK TO MIAMI APCH FREQ FROM TWR WHEN PUTTING IN THE GND FREQ ON THE OTHER RADIO CTL HEAD. I WOULD USUALLY SAY THE LESSON LEARNED WAS 'IF NOT SURE ASK AGAIN' BUT WE'RE NOT SURE IF WE WERE CLRED! NO CONFLICTS OCCURRED SINCE WE WERE THE ONLY ACFT ON FINAL AND NO OTHER ACFT WERE TAKING OFF OR TAXIING ON THAT SIDE OF THE FIELD AT THAT TIME. SUPPLEMENTAL INFO FROM ACN 358540: WE WERE ON APCH FREQ DURING ROLLOUT. IT SEEMED, HOWEVER, TO US THAT WE HAD RECEIVED A LNDG CLRNC, HOWEVER, THAT KEY PHRASE 'CLRED,' WAS GIVEN BY APCH TO ANOTHER ACFT. I FEEL WE MISTOOK 'CLRED' TO MEAN 'CLRED TO LAND.' I DID HAVE TWR DIALED INTO THE OTHER COM HEAD.

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.