ORF CTLR RECOGNIZES AFTER THE FACT THAT A B757 HAS LANDED WITHOUT CLRNC AND THAT HE HAS NOT ENSURED THAT A MAINT VEHICLE HAS CLRED THE RWY PRIOR TO THE LNDG.

Narrative

I WAS WORKING THE LATE NIGHT SHIFT. I HAD 3 POS COMBINED IN THE TWR; LCL CTL; GND CTL; AND CLRNC DELIVERY. NORMAL SOP IS TO PUT ALL FREQS UNDER YOUR CTL IN SPEAKER POS AND WORK OFF A HAND SET (LIKE A TELEPHONE) RATHER THAN A HEADSET. THE WX CLOSED IN SHORTLY AFTER I ASSUMED TWR POS; DECREASING TO CLOSE TO MINIMUMS; AT THE TIME OF THE OCCURRENCE; VISIBILITY WAS 3/4 MI INCREASING TO 1 1/2 MI. OUR PRIMARY RWY CLOSED THAT EVENING FOR MAINT; THEREFORE WE HAD NO ARRS UNTIL AFTER THE PRIMARY RWY OPENED AT XA30Z. OUR PRIMARY RWY IS RWY 5/23. MY MAIN FUNCTIONS THAT EVENING WERE MONITORING/CTLING VEHICULAR TFC AND MAKING ATIS MESSAGES DUE TO THE WX. AFTER RWY 5/23 OPENED; I HAD 2 ARR ACFT PRIOR TO THE OCCURRENCE. WHEN RWY 5/23 RE-OPENED; WE WERE ON RWY 5. AT THE TIME OF THE OCCURRENCE; VISIBILITY WAS 3/4 MI INCREASING TO 1 1/2 MI. THE APCH END OF RWY 5 TO SHORTLY BEYOND WAS VISIBLE AND THE FIELD/RWY WAS OBSCURED ON THE DEP END. THE CEILING WAS RPTED 200 FT. THE ILS MONITORED FUNCTIONING; HOWEVER; THE DME AND LOM HAD DROPPED OFF-LINE TWICE AFTER RWY 5 OPENED. APCH LIGHTS WERE ON STEP 3; WITH SEQUENCE FLASHING LIGHTS ON; TXWY LIGHTS ON AND RWY 5 RVR GREATER THAN 6000 FT. AT APPROX XB50Z; I TURNED ON THE TWR OVERHEAD EXHAUST FAN TO HELP CLR THE AIR OF CIGARETTE ODOR. THE FAN ADDED A FAIR AMOUNT OF AMBIENT NOISE TO THE ROOM. AN AIR TFC AID ARRIVED AT APPROX XC40Z AND TOOK RESPONSIBILITY FOR THE CLRNC DELIVERY POS. ARPT 6 CALLED GND CTL FOR CLRNC ON RWY 5 TO CHK THE WORK PERFORMED EARLIER THAT MORNING AND WAS CLRED ONTO THE RWY. I CALLED THE WX OFFICE TO INCREASE THE VISIBILITY TO 1 1/2 MI. THE MORNING SUPVR CALLED AND ASKED IF THE APCH LIGHTS WERE ON AND I REPLIED 'YES; WHO ASKED?' HE SAID 'THE GUY INBOUND LNDG; HE WAS SAYING THE APCH LIGHTS WERE NOT ON.' I REPLIED 'ON STEP 3; WITH FLASHERS.' I THEN PROCEEDED TO CHK EACH LIGHTING PANEL INDICATOR TO ENSURE THEY WERE ALL ON; SEVERAL OF WHICH ARE IN THE AREA OF THE LCL CTL POS. I ALSO CHKED THE POS OF ARPT 6 DURING THIS TIME. I WAS TURNED TOWARD THE CLRNC DELIVERY POS WHEN I HEARD ENG REVERSE THRUST CONSISTENT WITH THAT OF AN ARRIVING ACFT. I SPUN AROUND AND GRABBED FOR THE HAND SET KNOWING IMMEDIATELY WHAT HAD HAPPENED AND SAW ARPT 6 ON TXWY G AND A LARGE ACFT APCHING THE RWY 5/32 INTXN ON ROLLOUT. ARPT 6 CALLED GND CTL AND I INSTRUCTED HIM TO REMAIN ON THE TERMINAL SIDE OF THE FIELD. SHORTLY THEREAFTER; ACFT CALLED CLRING THE RWY. I INSTRUCTED HIM TO TAXI TO PARKING. I WAS RELIEVED BY THE MORNING CTLR AND RPTED THE SIT TO THE MORNING SUPVR. UPON REVIEW OF THE VOICE RECORDINGS; THERE WAS A XMISSION FROM ACFT TO THE TWR WHICH I THOUGHT WAS ARPT 6 AND ACKNOWLEDGED HIM. WHETHER THE MISCOM WAS DUE TO THE INCREASED NOISE LEVELS IN THE TWR DUE TO THE OVERHEAD FAN BEING ON; OR THE DISTRS CAUSED BY OPENING A POS OR A COMBINATION OF THESE WOULD BE A TOPIC OF DEBATE. ACFT NEVER RECEIVED A LNDG CLRNC; BUT LANDED NONETHELESS. ARPT 6 LATER RPTED HEARING MY 'ARPT 6 ROGER' CALL; BUT DID NOT REPLY THAT IT WAS NOT HE WHO XMITTED. SINCE I WAS ON HAND SET AND SPEAKER; IT SHOULD BE NOTED THAT EVEN WITH THE SPEAKER VOLUME FULL; OCCASIONALLY CALLS ARE DIFFICULT TO HEAR SATISFACTORILY FROM OTHER THAN THE LCL CTL 1 POS. THESE ISSUES DID NOT CLUE ME TO SCAN MY BRITE DISPLAY. INSTEAD; I WENT ABOUT CHKING MY LIGHTING PANELS TO INSURE EVERYTHING MONITORED NORMALLY; VISUALLY CHKING THE FIELD TO SEE IF THE LIGHTS I COULD SEE WERE ON; AND DISCOUNTING THE POSSIBILITY THAT AN ACFT ON APCH COULD HAVE MADE THIS STATEMENT. A CURSORY SCAN OF THE BRITE DISPLAY WOULD HAVE AVOIDED THE ENTIRE SIT. AFTER FURTHER INVESTIGATION AND REVIEW OF CONSTANT DATA RECORDING DATA; THE ACFT'S XMISSION WAS MADE AFTER HE LANDED AND WAS ROLLING OUT. THE SOP DICTATES LCL CTL 1 IS RESPONSIBLE FOR MONITORING HIS POS WHICH INCLUDES THE BRITE RADAR DISPLAY.