Narrative:

I was the 'PNF' on a ferry flight from europe to the USA. It was the captain's first flight with this type of navigation system and the so was rather inexperienced with this being his second international leg. I was busy trying to keep up with the navigation system and talk to and understand the french controllers. We were approaching the west coast of france and I realized that we were getting into the range of shanwick radio and I should be getting our oceanic clearance. When I looked at the master flight plan for our estimate to the north atlantic track entry point (48N 008W), I found that the so had not completed the etas as is our normal procedures. I quickly began to add up times on the flight plan, but in my haste, I miss added and came up with an ETA to our north at entry point that was one hour off (XA06Z instead of XB06Z). When I compared my computed ETA with the INS, it looked fine because the INS only gave the last 2 digits of the ETA (06). I requested and received a clearance from shanwick radio for the nat track and FL350. I had still not discovered my mistake when I gave the position crossing 48N 008W to shanwick at XB06Z (it was really XA06Z). Shortly after I gave the position report, shanwick called and told us to descend to FL330 immediately. At that time, I began to rechk our initial clearance and finally looked at the clock instead of the INS for the time. The next reporting position was just a few mins away and at that time I gave the proper air traffic area and etas for our flight. Looking back, this could have been prevented if I had asked one of the other crew members to verify my work. It would have also been smart if I would have looked at the clock instead of the INS to confirm my original estimate.

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Original NASA ASRS Text

Title: ACR WDB FLC ON FERRY FLT GIVE WRONG TIME FOR N ATLANTIC TRACK ENTRY.

Narrative: I WAS THE 'PNF' ON A FERRY FLT FROM EUROPE TO THE USA. IT WAS THE CAPT'S FIRST FLT WITH THIS TYPE OF NAV SYS AND THE SO WAS RATHER INEXPERIENCED WITH THIS BEING HIS SECOND INTL LEG. I WAS BUSY TRYING TO KEEP UP WITH THE NAV SYS AND TALK TO AND UNDERSTAND THE FRENCH CTLRS. WE WERE APCHING THE W COAST OF FRANCE AND I REALIZED THAT WE WERE GETTING INTO THE RANGE OF SHANWICK RADIO AND I SHOULD BE GETTING OUR OCEANIC CLRNC. WHEN I LOOKED AT THE MASTER FLT PLAN FOR OUR ESTIMATE TO THE N ATLANTIC TRACK ENTRY POINT (48N 008W), I FOUND THAT THE SO HAD NOT COMPLETED THE ETAS AS IS OUR NORMAL PROCS. I QUICKLY BEGAN TO ADD UP TIMES ON THE FLT PLAN, BUT IN MY HASTE, I MISS ADDED AND CAME UP WITH AN ETA TO OUR N AT ENTRY POINT THAT WAS ONE HR OFF (XA06Z INSTEAD OF XB06Z). WHEN I COMPARED MY COMPUTED ETA WITH THE INS, IT LOOKED FINE BECAUSE THE INS ONLY GAVE THE LAST 2 DIGITS OF THE ETA (06). I REQUESTED AND RECEIVED A CLRNC FROM SHANWICK RADIO FOR THE NAT TRACK AND FL350. I HAD STILL NOT DISCOVERED MY MISTAKE WHEN I GAVE THE POS XING 48N 008W TO SHANWICK AT XB06Z (IT WAS REALLY XA06Z). SHORTLY AFTER I GAVE THE POS RPT, SHANWICK CALLED AND TOLD US TO DSND TO FL330 IMMEDIATELY. AT THAT TIME, I BEGAN TO RECHK OUR INITIAL CLRNC AND FINALLY LOOKED AT THE CLOCK INSTEAD OF THE INS FOR THE TIME. THE NEXT RPTING POS WAS JUST A FEW MINS AWAY AND AT THAT TIME I GAVE THE PROPER ATA AND ETAS FOR OUR FLT. LOOKING BACK, THIS COULD HAVE BEEN PREVENTED IF I HAD ASKED ONE OF THE OTHER CREW MEMBERS TO VERIFY MY WORK. IT WOULD HAVE ALSO BEEN SMART IF I WOULD HAVE LOOKED AT THE CLOCK INSTEAD OF THE INS TO CONFIRM MY ORIGINAL ESTIMATE.

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.