Narrative:

The first officer was flying the aircraft and the captain was handling communications and checklist accomplishment. The flight received a moderate amount of radar vectoring to be sequenced for a visual approach to the left of 2 parallel runways. As we reported converging traffic from the right (being vectored to join final for the right parallel runway in sight, we received our final intercept heading, clearance for the visual approach and instructions to contact tower over the marker. We completed our visual approach and landing uneventfully and, after turning off the runway, noticed that radio was still on approach frequency. Essentially, we had landed without receiving or acknowledging such clearance from the tower. A contributing factor to this incident is believed to be 2 separate TCASII alerts, one while nearing the intercept to the localizer, and a second (with RA) established on final and approaching the OM. Both were valid warnings considering the proximity of the traffic (to our right and slightly behind) for the parallel runway, but nonetheless were distracting at the time when a frequency changeover and radio call were requested. Both pilots quickly agreed to disarm the alerting feature to eliminate the distraction. I guess I just wasn't up to the tank at hand and forgot the changeover call.

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Original NASA ASRS Text

Title: AN MLG ACR CREW LANDED WITHOUT CLRNC. THEY FORGOT TO SWITCH OVER TO TWR FROM APCH CTL.

Narrative: THE FO WAS FLYING THE ACFT AND THE CAPT WAS HANDLING COMS AND CHKLIST ACCOMPLISHMENT. THE FLT RECEIVED A MODERATE AMOUNT OF RADAR VECTORING TO BE SEQUENCED FOR A VISUAL APCH TO THE L OF 2 PARALLEL RWYS. AS WE RPTED CONVERGING TFC FROM THE R (BEING VECTORED TO JOIN FINAL FOR THE R PARALLEL RWY IN SIGHT, WE RECEIVED OUR FINAL INTERCEPT HDG, CLRNC FOR THE VISUAL APCH AND INSTRUCTIONS TO CONTACT TWR OVER THE MARKER. WE COMPLETED OUR VISUAL APCH AND LNDG UNEVENTFULLY AND, AFTER TURNING OFF THE RWY, NOTICED THAT RADIO WAS STILL ON APCH FREQ. ESSENTIALLY, WE HAD LANDED WITHOUT RECEIVING OR ACKNOWLEDGING SUCH CLRNC FROM THE TWR. A CONTRIBUTING FACTOR TO THIS INCIDENT IS BELIEVED TO BE 2 SEPARATE TCASII ALERTS, ONE WHILE NEARING THE INTERCEPT TO THE LOC, AND A SECOND (WITH RA) ESTABLISHED ON FINAL AND APCHING THE OM. BOTH WERE VALID WARNINGS CONSIDERING THE PROX OF THE TFC (TO OUR R AND SLIGHTLY BEHIND) FOR THE PARALLEL RWY, BUT NONETHELESS WERE DISTRACTING AT THE TIME WHEN A FREQ CHANGEOVER AND RADIO CALL WERE REQUESTED. BOTH PLTS QUICKLY AGREED TO DISARM THE ALERTING FEATURE TO ELIMINATE THE DISTR. I GUESS I JUST WASN'T UP TO THE TANK AT HAND AND FORGOT THE CHANGEOVER CALL.

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.