Narrative:

I fly night cargo operations in DC9 aircraft for xyz airlines. I fly regularly into ict. On many occasions approach, tower, ground and the flight data position, are combined and worked by the same person. Our arrival is either late at night, or very early in the morning. On jan/xx/94, I flew as first officer on flight from wilmington, oh, to wichita, ks, into ict airport. Both the captain and I had been on duty about 9 hours since XA00 EDT, as we neared ict airport and were told to contact ict approach on 134.0. I was working the radios and the captain was flying this particular leg. I contacted ict approach and received no answer. I recontacted approach a second time and the controller answered, instructing me to report the field in sight for the visual to runway 19R. At about 6 mi out the captain told me he had the runway so I notified the controller and he cleared us for the visual to runway 19R. We were both very tired, as we were finishing up a very difficult line of flying throughout the week. After landing and rollout, the captain and I both looked down and saw that the radio was still set on 134.0. Neither the captain nor I could remember whether we were switched over to tower, 118.2, or cleared to land by the approach controller, or whether we landed without clearance. After we pulled off the runway, I contacted ground on 121.9, and he instructed us to taxi to parking, as usual. There was no mention of landing without clearance by ground, us, or the clearance delivery person of the next clearance outbound. I am not sure whether we landed without clearance or were cleared by the approach controller to land, as happens many other nights. Again, nothing was said, but I'm just not sure whether we had clearance to land or not.

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Original NASA ASRS Text

Title: UNAUTH LNDG. CLRNC LNDG MAY NOT HAVE BEEN RECEIVED IN AN ACR NIGHT OP.

Narrative: I FLY NIGHT CARGO OPS IN DC9 ACFT FOR XYZ AIRLINES. I FLY REGULARLY INTO ICT. ON MANY OCCASIONS APCH, TWR, GND AND THE FLT DATA POS, ARE COMBINED AND WORKED BY THE SAME PERSON. OUR ARR IS EITHER LATE AT NIGHT, OR VERY EARLY IN THE MORNING. ON JAN/XX/94, I FLEW AS FO ON FLT FROM WILMINGTON, OH, TO WICHITA, KS, INTO ICT ARPT. BOTH THE CAPT AND I HAD BEEN ON DUTY ABOUT 9 HRS SINCE XA00 EDT, AS WE NEARED ICT ARPT AND WERE TOLD TO CONTACT ICT APCH ON 134.0. I WAS WORKING THE RADIOS AND THE CAPT WAS FLYING THIS PARTICULAR LEG. I CONTACTED ICT APCH AND RECEIVED NO ANSWER. I RECONTACTED APCH A SECOND TIME AND THE CTLR ANSWERED, INSTRUCTING ME TO RPT THE FIELD IN SIGHT FOR THE VISUAL TO RWY 19R. AT ABOUT 6 MI OUT THE CAPT TOLD ME HE HAD THE RWY SO I NOTIFIED THE CTLR AND HE CLRED US FOR THE VISUAL TO RWY 19R. WE WERE BOTH VERY TIRED, AS WE WERE FINISHING UP A VERY DIFFICULT LINE OF FLYING THROUGHOUT THE WK. AFTER LNDG AND ROLLOUT, THE CAPT AND I BOTH LOOKED DOWN AND SAW THAT THE RADIO WAS STILL SET ON 134.0. NEITHER THE CAPT NOR I COULD REMEMBER WHETHER WE WERE SWITCHED OVER TO TWR, 118.2, OR CLRED TO LAND BY THE APCH CTLR, OR WHETHER WE LANDED WITHOUT CLRNC. AFTER WE PULLED OFF THE RWY, I CONTACTED GND ON 121.9, AND HE INSTRUCTED US TO TAXI TO PARKING, AS USUAL. THERE WAS NO MENTION OF LNDG WITHOUT CLRNC BY GND, US, OR THE CLRNC DELIVERY PERSON OF THE NEXT CLRNC OUTBOUND. I AM NOT SURE WHETHER WE LANDED WITHOUT CLRNC OR WERE CLRED BY THE APCH CTLR TO LAND, AS HAPPENS MANY OTHER NIGHTS. AGAIN, NOTHING WAS SAID, BUT I'M JUST NOT SURE WHETHER WE HAD CLRNC TO LAND OR NOT.

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.