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After takeoff a CL60 encountered wake turbulence behind a B737-800 that was more severe than behind most B737's. Inadequate traffic separation provided by ATC.
| Attributes | |
| ACN | 768089 |
| Time | |
| Date | 200712 |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : las.airport |
| State Reference | NV |
| Altitude | agl single value : 300 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : las.tower |
| Operator | general aviation : corporate |
| Make Model Name | Challenger CL600 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | climbout : initial |
| Route In Use | departure sid : staav |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tower : las.tower |
| Operator | common carrier : air carrier |
| Make Model Name | B737-800 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : initial |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : corporate |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : multi engine pilot : cfi pilot : atp |
| Experience | flight time last 90 days : 93 flight time total : 19000 |
| ASRS Report | 768089 |
| Person 2 | |
| Affiliation | company : corporate |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : private pilot : multi engine |
| Experience | flight time last 90 days : 41 flight time total : 4915 flight time type : 720 |
| ASRS Report | 768090 |
| Events | |
| Anomaly | inflight encounter : wake turbulence non adherence : published procedure non adherence : clearance other spatial deviation |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : exited adverse environment flight crew : took evasive action |
| Supplementary | |
| Problem Areas | Environmental Factor ATC Human Performance Airspace Structure |
| Primary Problem | ATC Human Performance |
Narrative:
Departed las runway 25R after a B737-800 on the STAAV3 departure. At approximately 300 to 400 ft above ground encounter wake turbulence. The encounter lasted 30 to 45 seconds and three different times. The aircraft was rocked greater than 30 degrees of bank. Turned off the departure route; climbed and accelerated to clear the path behind the B737. This was the worst wake turbulence I have ever encountered. Perceptions of the crew: continued flight behind the aircraft would compromise the safety of the aircraft. Decisions of the crew for the safety of the aircraft: depart from the departure route to get out of the wake turbulence. Contributing factors: 1) tower cleared us for takeoff before the aircraft in front of us had lifted off the ground. 2) as a pilot did not wait as long as we should have before starting our takeoff. 3) pressure from lax local controller to keep traffic moving as fast as possible. Lessons learned: 1) the newer model 737's produce greater wake turbulence than previously thought. 2) do not let ATC's pressure you to move traffic leading us into an unsafe position.
Original NASA ASRS Text
Title: AFTER TKOF A CL60 ENCOUNTERED WAKE TURB BEHIND A B737-800 THAT WAS MORE SEVERE THAN BEHIND MOST B737'S. INADEQUATE TFC SEPARATION PROVIDED BY ATC.
Narrative: DEPARTED LAS RWY 25R AFTER A B737-800 ON THE STAAV3 DEP. AT APPROX 300 TO 400 FT ABOVE GND ENCOUNTER WAKE TURB. THE ENCOUNTER LASTED 30 TO 45 SECONDS AND THREE DIFFERENT TIMES. THE ACFT WAS ROCKED GREATER THAN 30 DEGS OF BANK. TURNED OFF THE DEP RTE; CLBED AND ACCELERATED TO CLR THE PATH BEHIND THE B737. THIS WAS THE WORST WAKE TURB I HAVE EVER ENCOUNTERED. PERCEPTIONS OF THE CREW: CONTINUED FLT BEHIND THE ACFT WOULD COMPROMISE THE SAFETY OF THE ACFT. DECISIONS OF THE CREW FOR THE SAFETY OF THE ACFT: DEPART FROM THE DEP RTE TO GET OUT OF THE WAKE TURB. CONTRIBUTING FACTORS: 1) TOWER CLRED US FOR TAKEOFF BEFORE THE ACFT IN FRONT OF US HAD LIFTED OFF THE GND. 2) AS A PLT DID NOT WAIT AS LONG AS WE SHOULD HAVE BEFORE STARTING OUR TAKEOFF. 3) PRESSURE FROM LAX LCL CTLR TO KEEP TFC MOVING AS FAST AS POSSIBLE. LESSONS LEARNED: 1) THE NEWER MODEL 737'S PRODUCE GREATER WAKE TURB THAN PREVIOUSLY THOUGHT. 2) DO NOT LET ATC'S PRESSURE YOU TO MOVE TFC LEADING US INTO AN UNSAFE POSITION.
Data retrieved from NASA's ASRS site as of January 2009 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.