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During pre-flight a B767 crew notice an unusually high flight time for their north atlantic crossing. Later on during coast in ATC reclears the flight on a route reducing flight time by approximately 1 hour. Reporter later researches the longer planned flight and finds the original route was filed incorrectly with a zig zag type pattern to the south and west of ireland.
| Attributes | |
| ACN | 1226020 |
| Time | |
| Date | 201412 |
| Local Time Of Day | 0001-0600 |
| Place | |
| Locale Reference | EISN.ARTCC |
| State Reference | FO |
| Environment | |
| Flight Conditions | VMC |
| Aircraft 1 | |
| Make Model Name | B767 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Cruise |
| Route In Use | Oceanic |
| Flight Plan | IFR |
| Person 1 | |
| Function | First Officer Pilot Not Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 120 Flight Crew Total 10000 Flight Crew Type 3000 |
| Events | |
| Anomaly | No Specific Anomaly Occurred All Types |
Narrative:
During flight planning the flight plan indicated the flight would depart on time; but arrive 1:11 late. We assumed it was due to an unusually long nat track and unfavorable winds. The flight plan called for a cost index of 149. After loading and verifying the flight plan in the FMS; we compared the FMC distance to that of the flight plan; and they matched. I had the 3rd break. I was called back to the cockpit an hour early and told that we were arriving on time; and with 10;000 lbs more fuel than expected. While on break; the flight had been cleared direct to a point ahead; which reduced the flight time by nearly 1 hour. We landed on time. The next morning I studied the flight plan to try and figure out what happened. That's when I noticed two points that took us nearly 90 degrees off course for 350 miles; then 180 turn back to a normal course. The route went bexet; lasno; emper; unlid. I assume the controller must have noticed the unusual route and when the flight was cleared direct to unlid; about an hour was knocked off the flight time; along with 10;000lbs of fuel savings.
Original NASA ASRS Text
Title: During pre-flight a B767 crew notice an unusually high flight time for their North Atlantic crossing. Later on during coast in ATC reclears the flight on a route reducing flight time by approximately 1 hour. Reporter later researches the longer planned flight and finds the original route was filed incorrectly with a zig zag type pattern to the south and west of Ireland.
Narrative: During flight planning the flight plan indicated the flight would depart on time; but arrive 1:11 late. We assumed it was due to an unusually long NAT track and unfavorable winds. The flight plan called for a cost index of 149. After loading and verifying the flight plan in the FMS; we compared the FMC distance to that of the flight plan; and they matched. I had the 3rd break. I was called back to the cockpit an hour early and told that we were arriving on time; and with 10;000 lbs more fuel than expected. While on break; the flight had been cleared direct to a point ahead; which reduced the flight time by nearly 1 hour. We landed on time. The next morning I studied the flight plan to try and figure out what happened. That's when I noticed two points that took us nearly 90 degrees off course for 350 miles; then 180 turn back to a normal course. The route went Bexet; Lasno; Emper; Unlid. I assume the controller must have noticed the unusual route and when the flight was cleared direct to Unlid; about an hour was knocked off the flight time; along with 10;000lbs of fuel savings.
Data retrieved from NASA's ASRS site 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.