Narrative:

On final approach runway 25L las, approximately 5 mi from landing, we were given a second approach control frequency. We were never switched to a tower frequency and I must have mistaken the second arrival frequency as the switch to tower. We landed without contacting tower.

Google
 

Original NASA ASRS Text

Title: FLC OF A SUPER MD80 FAILED TO CONTACT THE TWR DUE TO A MISUNDERSTANDING OF A SECOND FREQ GIVEN BY APCH CTLR ON FINAL.

Narrative: ON FINAL APCH RWY 25L LAS, APPROX 5 MI FROM LNDG, WE WERE GIVEN A SECOND APCH CTL FREQ. WE WERE NEVER SWITCHED TO A TWR FREQ AND I MUST HAVE MISTAKEN THE SECOND ARR FREQ AS THE SWITCH TO TWR. WE LANDED WITHOUT CONTACTING TWR.

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.