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A CL604 captain reported encountering wake turbulence on takeoff behind a heavy jet; resulting in a deviation from cleared track and altitude.
| Attributes | |
| ACN | 942743 |
| Time | |
| Date | 201104 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ZSSS.Airport |
| State Reference | FO |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Challenger CL604 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | Initial Climb |
| Route In Use | SID NXD02D |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Heavy Transport |
| Flight Phase | Initial Climb |
| Person 1 | |
| Function | Captain Pilot Not Flying |
| Qualification | Flight Crew Flight Engineer Flight Crew Instrument Flight Crew Multiengine |
| Experience | Flight Crew Last 90 Days 50 Flight Crew Total 12000 Flight Crew Type 120 |
| Events | |
| Anomaly | Deviation - Altitude Excursion From Assigned Altitude Deviation - Procedural Clearance Deviation - Procedural Published Material / Policy Deviation - Track / Heading All Types Inflight Event / Encounter Wake Vortex Encounter |
Narrative:
After taking off from runway 36L behind heavy airliner; ATC instructed us to climb and maintain 1;200 meters; moments later after the 'after take off procedures' were completed and during initial climb; the aircraft experienced an abrupt roll to the left. While pilot flying was trying to correct the unusual bank attitude; the aircraft had deviated from the desired SID tracks and assigned altitude; subsequently multiple headings were given by ATC to avoid conflicting traffic. Once the aircraft had stabilized and established on the assigned heading and altitude; the FD and the ats (automatic throttle system) were reset; followed by the autopilot system engaged; the aircraft continued to climb and precede en-route uneventfully. The aircraft was assumed to have encountered the wake turbulence from the preceding traffic. If the crew decided to wait on ground a few minutes longer; this situation could have been avoided!
Original NASA ASRS Text
Title: A CL604 Captain reported encountering wake turbulence on takeoff behind a heavy jet; resulting in a deviation from cleared track and altitude.
Narrative: After taking off from Runway 36L behind heavy airliner; ATC instructed us to climb and maintain 1;200 meters; moments later after the 'After take off procedures' were completed and during initial climb; the aircraft experienced an abrupt roll to the left. While pilot flying was trying to correct the unusual bank attitude; the aircraft had deviated from the desired SID tracks and assigned altitude; subsequently multiple headings were given by ATC to avoid conflicting traffic. Once the aircraft had stabilized and established on the assigned heading and altitude; the FD and the ATS (Automatic Throttle System) were reset; followed by the autopilot system engaged; the aircraft continued to climb and precede en-route uneventfully. The aircraft was assumed to have encountered the wake turbulence from the preceding traffic. If the crew decided to wait on ground a few minutes longer; this situation could have been avoided!
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.