Narrative:

Flight was scheduled from sdf-ewr. Clearance came via ACARS. First officer retrieved clearance after loading the INS routing from the flight plan. I checked the routing on the INS with the flight plan. Takeoff, climb and initial cruise uneventful. Approximately 20 mins after takeoff ZID asked if we were on 'J-526 or were we cutting the corner.' our INS loaded flight plan had iiu direct bkw. J-526 had a bend in it at fix iiu 100 degrees/137 KTS (ziebr) which occurs on the next fold of the map. It changes to a 270 degree radial inbound to bkw, a 10 degree course change. I replied that we were proceeding direct to bkw and asked if we were supposed to be on J526? The controller indicated that that was our clearance but to just go direct to bkw now. I checked the ACARS pre departure clearance and in fact we were cleared 'as filed except J526 bkw.' I and the first officer had missed the bend in the routing and had assumed it was a direct routing. It was our mistake. In the future, I will pay more attention to the pre departure clearance 'cleared as filed except,' wording and verify the routing more closely with the charts. The first officer apologized for the mistake and I replied that it is a crew airplane and that we both missed it. ATC was very professional and seemed not to be upset about the mistake. I certainly felt very embarrassed and unprofessional about not catching it. Lesson learned, no harm done, this time.

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Original NASA ASRS Text

Title: A DC8-71 FREIGHTER PIC IS CALLED TO TASK BY ATC FOR PROCEEDING DIRECT TO BKW VERSUS FLYING J526 TO BKW VOR, ZID, IN.

Narrative: FLT WAS SCHEDULED FROM SDF-EWR. CLRNC CAME VIA ACARS. FO RETRIEVED CLRNC AFTER LOADING THE INS ROUTING FROM THE FLT PLAN. I CHKED THE ROUTING ON THE INS WITH THE FLT PLAN. TKOF, CLB AND INITIAL CRUISE UNEVENTFUL. APPROX 20 MINS AFTER TKOF ZID ASKED IF WE WERE ON 'J-526 OR WERE WE CUTTING THE CORNER.' OUR INS LOADED FLT PLAN HAD IIU DIRECT BKW. J-526 HAD A BEND IN IT AT FIX IIU 100 DEGS/137 KTS (ZIEBR) WHICH OCCURS ON THE NEXT FOLD OF THE MAP. IT CHANGES TO A 270 DEG RADIAL INBOUND TO BKW, A 10 DEG COURSE CHANGE. I REPLIED THAT WE WERE PROCEEDING DIRECT TO BKW AND ASKED IF WE WERE SUPPOSED TO BE ON J526? THE CTLR INDICATED THAT THAT WAS OUR CLRNC BUT TO JUST GO DIRECT TO BKW NOW. I CHKED THE ACARS PDC AND IN FACT WE WERE CLRED 'AS FILED EXCEPT J526 BKW.' I AND THE FO HAD MISSED THE BEND IN THE ROUTING AND HAD ASSUMED IT WAS A DIRECT ROUTING. IT WAS OUR MISTAKE. IN THE FUTURE, I WILL PAY MORE ATTN TO THE PDC 'CLRED AS FILED EXCEPT,' WORDING AND VERIFY THE ROUTING MORE CLOSELY WITH THE CHARTS. THE FO APOLOGIZED FOR THE MISTAKE AND I REPLIED THAT IT IS A CREW AIRPLANE AND THAT WE BOTH MISSED IT. ATC WAS VERY PROFESSIONAL AND SEEMED NOT TO BE UPSET ABOUT THE MISTAKE. I CERTAINLY FELT VERY EMBARRASSED AND UNPROFESSIONAL ABOUT NOT CATCHING IT. LESSON LEARNED, NO HARM DONE, THIS TIME.

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.