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B767-300 departure from iad refused ATC takeoff clearance behind B777 with less than 2 minute interval.
| Attributes | |
| ACN | 823640 |
| Time | |
| Date | 200902 |
| Local Time Of Day | 0001-0600 |
| Place | |
| Locale Reference | IAD.Airport |
| State Reference | DC |
| Environment | |
| Flight Conditions | VMC |
| Aircraft 1 | |
| Make Model Name | B767-300 and 300 ER |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Taxi |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | B777 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Takeoff |
| Flight Plan | IFR |
| Person 1 | |
| Function | Captain Pilot Not Flying |
| Experience | Flight Crew Last 90 Days 220 Flight Crew Total 21000 Flight Crew Type 13000 |
| Events | |
| Anomaly | ATC Issue All Types |
Narrative:
Was ordered to take off with less than the minimum 2 minute separation time; behind a B777 (hacked time at his takeoff roll and takeoff thrust application) and was at XA05 when dulles tower cleared us for 'immediate takeoff.' stated that 'I could not do that for about another minute.' tower became very agitated and told us to either start roll 'now' or 'get off the runway.' told him we did not have 2 minutes for about 30 seconds and would not take off without 2 full minutes. By the time this little conversation had run its course; we had the 2 minutes; and took off. It would be nice if we all played and honored the same time-proven rules of safety (i.e.; 2 full minutes wake turbulence separation...minimum). That was a full 777 going to europe -- with no wind. It was bad enough as it was; with 2 minutes. We were kicked around pretty good. Someone needs to come out to iad and re-train our iad controllers on wake turbulence separation times -- and the time starts not when you clear the prior 777 for takeoff -- but when he actually starts his takeoff roll (he sat there for about 10-20 seconds after he was cleared).
Original NASA ASRS Text
Title: B767-300 departure from IAD refused ATC takeoff clearance behind B777 with less than 2 minute interval.
Narrative: Was ordered to take off with less than the minimum 2 minute separation time; behind a B777 (hacked time at his takeoff roll and takeoff thrust application) and was at XA05 when Dulles Tower cleared us for 'immediate takeoff.' Stated that 'I could not do that for about another minute.' Tower became very agitated and told us to either start roll 'Now' or 'Get off the runway.' Told him we did not have 2 minutes for about 30 seconds and would NOT take off without 2 FULL minutes. By the time this little conversation had run its course; we had the 2 minutes; and took off. It would be nice if we all played and honored the same time-proven rules of safety (i.e.; 2 full minutes wake turbulence separation...minimum). That was a full 777 going to Europe -- with no wind. It was bad enough as it was; with 2 minutes. We were kicked around pretty good. Someone needs to come out to IAD and re-train our IAD Controllers on wake turbulence separation times -- and the time starts NOT when you clear the prior 777 for takeoff -- but when he actually starts his takeoff roll (he sat there for about 10-20 seconds after he was cleared).
Data retrieved from NASA's ASRS site as of April 2012 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.