Narrative:

On initial contact with approach, we (aircraft X) were told to expect runway 19L, and first officer read that back. No further mention was made of runway number until we went through the runway 19R localizer. Approach clearance went something like 'turn right 160 degrees to intercept the localizer' and then '3000 ft until...established, cleared for the approach.' we came in from the west so when we went through the runway 19R localizer, the controller questioned us. We told him we were told to expect runway 19L on initial contact. He then cleared us for an approach on runway 19L. Communication disconnect between approach and aircraft. No redundancy in runway assignment verbiage led to approach thinking we were set up for the right (runway 19R) side.

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Original NASA ASRS Text

Title: CL65 FLC IS QUESTIONED BY IAD CTLR WHEN OBSERVED TRACKING ACROSS THE RWY 19R FINAL APCH COURSE. FLC ADVISES THEY WERE TOLD TO EXPECT RWY 19L ON INITIAL CONTACT.

Narrative: ON INITIAL CONTACT WITH APCH, WE (ACFT X) WERE TOLD TO EXPECT RWY 19L, AND FO READ THAT BACK. NO FURTHER MENTION WAS MADE OF RWY NUMBER UNTIL WE WENT THROUGH THE RWY 19R LOC. APCH CLRNC WENT SOMETHING LIKE 'TURN R 160 DEGS TO INTERCEPT THE LOC' AND THEN '3000 FT UNTIL...ESTABLISHED, CLRED FOR THE APCH.' WE CAME IN FROM THE W SO WHEN WE WENT THROUGH THE RWY 19R LOC, THE CTLR QUESTIONED US. WE TOLD HIM WE WERE TOLD TO EXPECT RWY 19L ON INITIAL CONTACT. HE THEN CLRED US FOR AN APCH ON RWY 19L. COM DISCONNECT BTWN APCH AND ACFT. NO REDUNDANCY IN RWY ASSIGNMENT VERBIAGE LED TO APCH THINKING WE WERE SET UP FOR THE R (RWY 19R) SIDE.

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.