Narrative:

On flight from lhr to sfo, approaching N64 W60, received rerte from montreal, as follows: N6330 W67, N60 W80, N5530 W90, ywe, as filed. I incorrectly entered N5330 W90 vice N5530 W90 in the FMC. First officer checked route but did not catch error, nor did I. Shortly thereafter, I went on rest break. The rerte was passed to dispatch (correctly) but new flight plan not received in cockpit until after 80W so crew was unable to check routing against paper plan. Plotting chart is not required over canada, so that xchk was gone. 2 position reports were made (67W and 80W), but ATC did not catch error. At 83W winnipeg called to verify next waypoint. Error was caught at that time and flight was cleared to descend to FL330 from FL350 and cleared direct winnipeg. After several mins flight was cleared back to FL350. Deviation from course was approximately 30 NM. Perhaps resumption of position plotting over canada would help prevent another occurrence of this kind. Supplemental information from acn 410444: 2 position reports were made prior with incorrect waypoint given, and none caught error. Flying first officer had come back from break prior to 080W and captain went back for his break at that time. The flying first officer did not catch error either. This keyboard entry error which caused the navigation deviation was not recognized by 3 pilots and 3 controllers (through position reports). We followed all procedures correctly but didn't have a new flight plan from dispatch for the final and most essential verification. Supplemental information from acn 410452: the captain took his rest break prior to W80, I took his seat and the flying first officer took right seat. We briefed the rerte but didn't have the hard copy from dispatch yet for her to check it. I told them the incorrectly entered waypoint of N5330 W090. They told us to descend from FL350 to FL330 (we saw traffic ahead approximately 40 NM at FL350). (Original flight plan route: N64 W060 direct kagly direct teffo N544B ywg.) we did query dispatch as to why it was taking so long to get new flight plan. They answered over ACARS saying they had to enter it in the computer and it would be a while.

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Original NASA ASRS Text

Title: A B777 FLC DOES NOT CATCH THE ERRONEOUS FMC ENTRY RELATIVE TO THEIR RERTE OVER CANADA AND EXPERIENCE A HDG TRACK POS DEV. CTLR CATCHES MISTAKE AND DSNDS ACFT FOR OPPOSING TFC.

Narrative: ON FLT FROM LHR TO SFO, APCHING N64 W60, RECEIVED RERTE FROM MONTREAL, AS FOLLOWS: N6330 W67, N60 W80, N5530 W90, YWE, AS FILED. I INCORRECTLY ENTERED N5330 W90 VICE N5530 W90 IN THE FMC. FO CHKED RTE BUT DID NOT CATCH ERROR, NOR DID I. SHORTLY THEREAFTER, I WENT ON REST BREAK. THE RERTE WAS PASSED TO DISPATCH (CORRECTLY) BUT NEW FLT PLAN NOT RECEIVED IN COCKPIT UNTIL AFTER 80W SO CREW WAS UNABLE TO CHK ROUTING AGAINST PAPER PLAN. PLOTTING CHART IS NOT REQUIRED OVER CANADA, SO THAT XCHK WAS GONE. 2 POS RPTS WERE MADE (67W AND 80W), BUT ATC DID NOT CATCH ERROR. AT 83W WINNIPEG CALLED TO VERIFY NEXT WAYPOINT. ERROR WAS CAUGHT AT THAT TIME AND FLT WAS CLRED TO DSND TO FL330 FROM FL350 AND CLRED DIRECT WINNIPEG. AFTER SEVERAL MINS FLT WAS CLRED BACK TO FL350. DEV FROM COURSE WAS APPROX 30 NM. PERHAPS RESUMPTION OF POS PLOTTING OVER CANADA WOULD HELP PREVENT ANOTHER OCCURRENCE OF THIS KIND. SUPPLEMENTAL INFO FROM ACN 410444: 2 POS RPTS WERE MADE PRIOR WITH INCORRECT WAYPOINT GIVEN, AND NONE CAUGHT ERROR. FLYING FO HAD COME BACK FROM BREAK PRIOR TO 080W AND CAPT WENT BACK FOR HIS BREAK AT THAT TIME. THE FLYING FO DID NOT CATCH ERROR EITHER. THIS KEYBOARD ENTRY ERROR WHICH CAUSED THE NAV DEV WAS NOT RECOGNIZED BY 3 PLTS AND 3 CTLRS (THROUGH POS RPTS). WE FOLLOWED ALL PROCS CORRECTLY BUT DIDN'T HAVE A NEW FLT PLAN FROM DISPATCH FOR THE FINAL AND MOST ESSENTIAL VERIFICATION. SUPPLEMENTAL INFO FROM ACN 410452: THE CAPT TOOK HIS REST BREAK PRIOR TO W80, I TOOK HIS SEAT AND THE FLYING FO TOOK R SEAT. WE BRIEFED THE RERTE BUT DIDN'T HAVE THE HARD COPY FROM DISPATCH YET FOR HER TO CHK IT. I TOLD THEM THE INCORRECTLY ENTERED WAYPOINT OF N5330 W090. THEY TOLD US TO DSND FROM FL350 TO FL330 (WE SAW TFC AHEAD APPROX 40 NM AT FL350). (ORIGINAL FLT PLAN RTE: N64 W060 DIRECT KAGLY DIRECT TEFFO N544B YWG.) WE DID QUERY DISPATCH AS TO WHY IT WAS TAKING SO LONG TO GET NEW FLT PLAN. THEY ANSWERED OVER ACARS SAYING THEY HAD TO ENTER IT IN THE COMPUTER AND IT WOULD BE A WHILE.

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.