HS125 CREW LANDS AT TUL WITHOUT CLRNC AND OFF LCL CTL FREQ.

Narrative

I WAS THE R SEAT PLT ON AN IFR FLT FROM HOUSTON INTER-CONTINENTAL (IAH) TO TULSA INTL ARPT (TUL) IN A HAWKER 400 ACFT. I WAS TYPED AND CURRENT AS A CAPT ON THIS FLT AS WAS THE L SEAT PLT WHO WAS THE PF. TULSA APCH CTL VECTORED US ON A R DOWNWIND W OF THE FIELD FOR A VISUAL APCH TO RWY 18L AT TULSA. AFTER DSNDING BELOW A HIGH OVCST I CALLED THE FIELD IN SIGHT TO THE APCH CTLR. HE TURNED US TO A 090 DEG HDG FOR THE R BASE; CLRED US FOR A VISUAL APCH FOR RWY 18L AND HANDED US OFF TO THE TWR CTLR. JUST AS I WAS ACKNOWLEDGING HIS XMISSION THE PF CALLED FOR THE FIRST OF 3 FLAP SETTINGS IN PREPARATION FOR LNDG. AFTER I FINISHED RESPONDING TO THE CTLR; I CONFIRMED THE REQUESTED FLAPS WITH THE PF AND PUT THEM DOWN. I THEN IMMEDIATELY SET ABOUT FINISHING BEFORE LNDG CHKLIST AS WE WERE APPROX 2 MI FROM THE FIELD. THE SECOND RADIO WAS TUNED TO GND CTL IN PREPARATION FOR ITS USE WHILE I WAS STILL TALKING TO APCH AND WHEN THE APCH CTLR HANDED US OFF I PUNCHED THE FLIP-FLOP BUTTON TO THIS RADIO FREQ AND THEN I TUNED THE OTHER SIDE OF THE RADIO TO TWR CTL. I NEGLECTED TO RESELECT THE OTHER SIDE OF THE RADIO TO TALK TO TWR AS I WAS BUSY WITH THE CHKLIST. IN SO DOING I WAS MONITORING GND CTL ON OUR APCH AND LNDG. AFTER CLRING THE RWY I REACHED TO FLIP THE RADIO TO GND FREQ AND NOTICED IT WAS ALREADY TUNED AND THAT I HAD MADE A MISTAKE. THE GND CTLR QUIZZED ME ON WHETHER I HAD CALLED THE TWR CTLR CONFIRMING I HAD MADE A MAJOR MISTAKE. AS FAR AS I COULD TELL NO LOSS OF SEPARATION WITH OTHER ACFT OCCURRED AND NO SERIOUS RAMIFICATIONS CAME OF MY CARELESSNESS. I FEEL THE CAUSES OF MY FAILURE TO CONTACT TWR WERE RELATED TO DISTRACTIONS IN THE COCKPIT AND FAILURE ON MY PART TO ADHERE TO ACCEPTED STANDARD PROCS. FATIGUE MAY HAVE ALSO PLAYED A ROLE.