Narrative:

We had flown west on a nat track (north atlantic track) with an inland fix at lakes intersection. The captain had entered our route prior to takeoff and I checked it by going down our flight planning form and entering the winds aloft at the flight plan fixes. The captain had entered the route as lakes direct mofat, our filed and subsequently cleared route was lakes na 316 mofat. These 2 rtes were not the same -- the cleared route went lakes-hinge-teals-mofat. My checking the route with the flight plan form did not catch the error since hinge and teals were not on the form. Our flight was an ETOPS flight, with a relief pilot. Just after center issued our clearance, I was relieved and went onto a rest period in the cabin. Normally this is where somebody would doublechk the FMS route with the book, but with the shift change and some complacency, none of us did. The result was a navigation deviation that center discovered, with no apparent compromise of separation. In the future, I will check our FMS loaded route with the flight plan filed route section and will also make a greater effort to guard against complacency. A copy of this (de-idented, of course) will go to our training people so that maybe others will not be caught by the method I used to check our route.

Related reports:

Google
 

Original NASA ASRS Text

Title: NAV ERROR ADMITTED IN HDG TRACK POS DEV.

Narrative: WE HAD FLOWN W ON A NAT TRACK (N ATLANTIC TRACK) WITH AN INLAND FIX AT LAKES INTXN. THE CAPT HAD ENTERED OUR RTE PRIOR TO TKOF AND I CHKED IT BY GOING DOWN OUR FLT PLANNING FORM AND ENTERING THE WINDS ALOFT AT THE FLT PLAN FIXES. THE CAPT HAD ENTERED THE RTE AS LAKES DIRECT MOFAT, OUR FILED AND SUBSEQUENTLY CLRED RTE WAS LAKES NA 316 MOFAT. THESE 2 RTES WERE NOT THE SAME -- THE CLRED RTE WENT LAKES-HINGE-TEALS-MOFAT. MY CHKING THE RTE WITH THE FLT PLAN FORM DID NOT CATCH THE ERROR SINCE HINGE AND TEALS WERE NOT ON THE FORM. OUR FLT WAS AN ETOPS FLT, WITH A RELIEF PLT. JUST AFTER CTR ISSUED OUR CLRNC, I WAS RELIEVED AND WENT ONTO A REST PERIOD IN THE CABIN. NORMALLY THIS IS WHERE SOMEBODY WOULD DOUBLECHK THE FMS RTE WITH THE BOOK, BUT WITH THE SHIFT CHANGE AND SOME COMPLACENCY, NONE OF US DID. THE RESULT WAS A NAV DEV THAT CTR DISCOVERED, WITH NO APPARENT COMPROMISE OF SEPARATION. IN THE FUTURE, I WILL CHK OUR FMS LOADED RTE WITH THE FLT PLAN FILED RTE SECTION AND WILL ALSO MAKE A GREATER EFFORT TO GUARD AGAINST COMPLACENCY. A COPY OF THIS (DE-IDENTED, OF COURSE) WILL GO TO OUR TRAINING PEOPLE SO THAT MAYBE OTHERS WILL NOT BE CAUGHT BY THE METHOD I USED TO CHK OUR RTE.

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.