ACR LNDG WITHOUT CLRNC. PLTDEV.

Narrative

I WAS THE PF OF A FLT INTO PIT. THE WX WAS EXCEPTIONALLY GOOD AND THE FLT PROCEEDED NORMALLY. UPON ENTERING PIT AIRSPACE WE WERE TOLD TO LOOK FOR MLG ACR Y THAT WE WOULD FOLLOW TO THE ARPT. WE FOUND THE TFC AND WERE CLRED FOR THE VISUAL APCH TO 28L. SINCE I WAS FLYING; I WAS CONCENTRATING ON KEEPING THE TFC IN SIGHT. SINCE IT WAS DUSK I WAS LOOKING INTO THE SUN DURING THIS TIME. THE CAPT FOR THE FLT WAS NEW IN THE AIRPLANE; THIS WAS HIS SECOND DAY OF LINE FLYING SINCE IOE AND WASN'T YET SETTLED INTO THE 'FLOW' OF THE CHKLISTS AND HANDLING OF THE ACFT. WE CONTINUED THE APCH AND LANDED; UPON CLRING THE RWY WE WERE NOT TOLD TO CONTACT GND SO I ANNOUNCED (THE CAPT NOW HAD CTL OF THE ACFT) THAT FLT XXXX WAS CLR OF THE ACTIVE. AFTER A PAUSE WE WERE TOLD TO CONTACT GND .9. THIS PAUSE WAS THE FIRST HINT THAT SOMETHING WAS WRONG. GND TOLD US TO TAXI TO THE RAMP AND AFTER A FEW MOMENTS ASKED US IF WE HAD TALKED TO THE TWR. WE REPLIED THAT WE HAD AND HE REPLIED THAT THE TWR MUST BE GETTING FORGETFUL. NOTHING ELSE WAS SAID. AFTER FURTHER THINKING WE LATER REALIZED THAT APCH HAD NEVER SWITCHED US TO TWR AND THAT WE TOO HAD FORGOTTEN TO REMIND THEM. I BELIEVE THAT I WAS TRYING TO KEEP OUR TFC IN SIGHT AND FOLLOW THE ILS SO INTENTLY WHILE LOOKING INTO THE SUN THAT I FAILED TO NOTICE THAT WE HAD NEVER SWAPPED FREQS. ATC WAS RELATIVELY BUSY AND WE HAD BEEN CLRED FOR THE VISUAL; I BELIEVE THAT THE LAST THING EITHER OF US DISTINCTLY REMEMBERS IS BEING CLRED FOR APCH AND IT STUCK IN OUR HEADS ENOUGH THAT WE THOUGHT WE WERE CLRED TO LAND. I HAVE TO SAY THAT I BELIEVE THE MAJORITY OF THE BLAME RESTS WITH US; THE CREW. ALTHOUGH WE WERE TIRED THAT IS NOT AN EXCUSE TO LET ONE'S DILIGENCE WANE. I BELIEVE THAT PART OF THE SITUATION WAS CAUSED BY APCH NEVER TELLING US TO CONTACT THE TWR. MORE AWARENESS BY BOTH PARTIES WOULD HAVE PREVENTED THE SITUATION.