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Ord tower controller reported departing a B747 from runway 10L followed by a B777. The B777 encountered wake turbulence and deviated to avoid it.
| Attributes | |
| ACN | 1375773 |
| Time | |
| Date | 201607 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | ORD.Tower |
| State Reference | IL |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | B747-400 |
| Operating Under FAR Part | Part 129 |
| Flight Phase | Climb |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | B777 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Initial Climb |
| Flight Plan | IFR |
| Person 1 | |
| Function | Local |
| Qualification | Air Traffic Control Fully Certified |
| Experience | Air Traffic Control Time Certified In Pos 1 (yrs) 1 |
| Events | |
| Anomaly | ATC Issue All Types Deviation - Procedural Published Material / Policy Inflight Event / Encounter Wake Vortex Encounter |
Narrative:
Aircraft X was cleared for takeoff on runway 10L; initially assigned runway heading then turned to a 040 heading once there was no longer a conflict with traffic departing runway 9R. Aircraft Y was then cleared for takeoff; assigned runway heading. Shortly after rotation; aircraft Y advised he was turning left for a wake encounter. Aircraft Y turned left to an approximate heading of 075. I advised aircraft Y to fly heading 090 as soon as able for traffic departing runway 9R. After aircraft Y was established on a 090 heading; I issued a turn to 040 and instructed the pilot to contact departure.standard wake turbulence separation must be ensured.
Original NASA ASRS Text
Title: ORD Tower Controller reported departing a B747 from Runway 10L followed by a B777. The B777 encountered wake turbulence and deviated to avoid it.
Narrative: Aircraft X was cleared for takeoff on Runway 10L; initially assigned runway heading then turned to a 040 heading once there was no longer a conflict with traffic departing Runway 9R. Aircraft Y was then cleared for takeoff; assigned runway heading. Shortly after rotation; Aircraft Y advised he was turning left for a wake encounter. Aircraft Y turned left to an approximate heading of 075. I advised Aircraft Y to fly heading 090 as soon as able for traffic departing Runway 9R. After Aircraft Y was established on a 090 heading; I issued a turn to 040 and instructed the pilot to contact departure.Standard wake turbulence separation must be ensured.
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.