Narrative:

Center cleared us for the ILS via a transition route to OM, and told us to contact PDT tower. PDT tower told us to report the OM inbound. First officer failed to report the marker, and I failed to notice the omission. After T/D and exiting from the runway, tower asked us our position. Since the runway was not visible from the tower due to heavy fog, we thought they wanted to know our position on the airport. Tower gave us clearance to taxi to the gate. It was not until after shutdown that neither one of us could remember having received a landing clearance. My first officer was inexperienced on the line, having completed his initial operating experience only 2 weeks previous. The flight originated at walla walla, wa, an airport 35 mi northeast of PDT. Total air time, including the full approach, was 21 mins, and was entirely in IMC and at night. On such short legs the workload for both pilots, especially the PNF (in this case the first officer) is very intense. Biological factors: we began this trip at our domicile at XA00 hours on 12/wed/89, and arrived at walla walla shortly before midnight. We overnighted there and reported for duty at XA10 hours on thur to begin the second day of our 2-DAY trip. However, due to heavy fog at walla walla, no flts were able to land all day, including the flight that was to bring our airplane. We were kept at the airport for another 3 hours before dispatch and crew scheduling released us from duty. At midnight walla walla station operations awakened me at the hotel to inform me that we were to take a taxi cabin attendant at XC00 hours to pasco, wa (an hour's ride), whereupon we would pick up our airplane and attempt to reposition to walla. Since our circadian rhythms were on an afternoon-evening cycle, our need to arise at XC30 hours (an hour only slightly later than the one at which we retired the previous day) seriously compromised our ability to perform, and eroded the safety margin needed to deal with emergencys.

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Original NASA ASRS Text

Title: COMMUTER SMT UNAUTH LNDG AT PDT.

Narrative: CENTER CLRED US FOR THE ILS VIA A TRANSITION ROUTE TO OM, AND TOLD US TO CONTACT PDT TWR. PDT TWR TOLD US TO RPT THE OM INBND. F/O FAILED TO RPT THE MARKER, AND I FAILED TO NOTICE THE OMISSION. AFTER T/D AND EXITING FROM THE RWY, TWR ASKED US OUR POS. SINCE THE RWY WAS NOT VISIBLE FROM THE TWR DUE TO HEAVY FOG, WE THOUGHT THEY WANTED TO KNOW OUR POS ON THE ARPT. TWR GAVE US CLRNC TO TAXI TO THE GATE. IT WAS NOT UNTIL AFTER SHUTDOWN THAT NEITHER ONE OF US COULD REMEMBER HAVING RECEIVED A LNDG CLRNC. MY F/O WAS INEXPERIENCED ON THE LINE, HAVING COMPLETED HIS INITIAL OPERATING EXPERIENCE ONLY 2 WKS PREVIOUS. THE FLT ORIGINATED AT WALLA WALLA, WA, AN ARPT 35 MI NE OF PDT. TOTAL AIR TIME, INCLUDING THE FULL APCH, WAS 21 MINS, AND WAS ENTIRELY IN IMC AND AT NIGHT. ON SUCH SHORT LEGS THE WORKLOAD FOR BOTH PLTS, ESPECIALLY THE PNF (IN THIS CASE THE F/O) IS VERY INTENSE. BIOLOGICAL FACTORS: WE BEGAN THIS TRIP AT OUR DOMICILE AT XA00 HRS ON 12/WED/89, AND ARRIVED AT WALLA WALLA SHORTLY BEFORE MIDNIGHT. WE OVERNIGHTED THERE AND RPTED FOR DUTY AT XA10 HRS ON THUR TO BEGIN THE SECOND DAY OF OUR 2-DAY TRIP. HOWEVER, DUE TO HEAVY FOG AT WALLA WALLA, NO FLTS WERE ABLE TO LAND ALL DAY, INCLUDING THE FLT THAT WAS TO BRING OUR AIRPLANE. WE WERE KEPT AT THE ARPT FOR ANOTHER 3 HRS BEFORE DISPATCH AND CREW SCHEDULING RELEASED US FROM DUTY. AT MIDNIGHT WALLA WALLA STATION OPS AWAKENED ME AT THE HOTEL TO INFORM ME THAT WE WERE TO TAKE A TAXI CAB AT XC00 HRS TO PASCO, WA (AN HR'S RIDE), WHEREUPON WE WOULD PICK UP OUR AIRPLANE AND ATTEMPT TO REPOSITION TO WALLA. SINCE OUR CIRCADIAN RHYTHMS WERE ON AN AFTERNOON-EVENING CYCLE, OUR NEED TO ARISE AT XC30 HRS (AN HR ONLY SLIGHTLY LATER THAN THE ONE AT WHICH WE RETIRED THE PREVIOUS DAY) SERIOUSLY COMPROMISED OUR ABILITY TO PERFORM, AND ERODED THE SAFETY MARGIN NEEDED TO DEAL WITH EMERS.

Data retrieved from NASA's ASRS site as of August 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.