Narrative:

I was the first officer and PF while conducting a visual approach to runway 9R in atl. Approach control cleared us for a visual approach and told us to contact the tower at the OM. At 500 ft AGL, the captain (who was PNF) stated 'no flags, gear checked down, cleared to land.' after landing, when the captain took over the controls to taxi, I noticed we were still on approach control frequency and had never switched to tower frequency prior to landing. I immediately switched to tower frequency, and we were cleared to taxi to the gate.

Google
 

Original NASA ASRS Text

Title: ACR FLC LNDG AT ATL FAILED TO CONTACT TWR AS INSTRUCTED BY APCH AND LANDED WITHOUT LNDG CLRNC.

Narrative: I WAS THE FO AND PF WHILE CONDUCTING A VISUAL APCH TO RWY 9R IN ATL. APCH CTL CLRED US FOR A VISUAL APCH AND TOLD US TO CONTACT THE TWR AT THE OM. AT 500 FT AGL, THE CAPT (WHO WAS PNF) STATED 'NO FLAGS, GEAR CHKED DOWN, CLRED TO LAND.' AFTER LNDG, WHEN THE CAPT TOOK OVER THE CTLS TO TAXI, I NOTICED WE WERE STILL ON APCH CTL FREQ AND HAD NEVER SWITCHED TO TWR FREQ PRIOR TO LNDG. I IMMEDIATELY SWITCHED TO TWR FREQ, AND WE WERE CLRED TO TAXI TO THE GATE.

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.