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A crj-200 pilot reports light to moderate wake vortex including a stall warning and stick shaker for 1 second at 1000 ft after takeoff behind an A320 aircraft.
| Attributes | |
| ACN | 816459 |
| Time | |
| Date | 200812 |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : phx.airport |
| State Reference | AZ |
| Altitude | agl single value : 1500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : phx.tower |
| Operator | common carrier : air carrier |
| Make Model Name | Regional Jet 200 ER&LR |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : initial |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tower : phx.tower |
| Operator | common carrier : air carrier |
| Make Model Name | Airbus Industrie Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : commercial |
| Experience | flight time last 90 days : 150 flight time total : 5000 flight time type : 3000 |
| ASRS Report | 816459 |
| Events | |
| Anomaly | inflight encounter : wake turbulence non adherence : required legal separation |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : detected after the fact |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance ATC Human Performance Airport |
| Primary Problem | Ambiguous |
Narrative:
After take-off behind an airbus; we experienced wake turbulence after acceleration altitude of 1000 ft AGL. Wake turbulence was light to moderate; we received a stick-shaker/stall warning that lasted approximately 1 second. We were in a climb of approximately 1000 FPM and did not experience any loss of separation or loss of aircraft control. What caused the problem: 1) failure to fly the airplane at a profile that would best avoid this event. 2) lack of adequate separation by ATC/tower -- we were cleared for takeoff. 3) flex thrust. Flex thrust was used. In retrospect; it may have been advantageous to take-off with full power in order to gain the benefits of an increased climb rate and an earlier vr point on the runway. What can prevent the problem: 1) insist on more separation from larger aircraft prior to being put in take-off sequence. 2) full power take-off when operationally feasible.
Original NASA ASRS Text
Title: A CRJ-200 PILOT REPORTS LIGHT TO MODERATE WAKE VORTEX INCLUDING A STALL WARNING AND STICK SHAKER FOR 1 SECOND AT 1000 FT AFTER TAKEOFF BEHIND AN A320 AIRCRAFT.
Narrative: AFTER TAKE-OFF BEHIND AN AIRBUS; WE EXPERIENCED WAKE TURBULENCE AFTER ACCELERATION ALTITUDE OF 1000 FT AGL. WAKE TURBULENCE WAS LIGHT TO MODERATE; WE RECEIVED A STICK-SHAKER/STALL WARNING THAT LASTED APPROXIMATELY 1 SECOND. WE WERE IN A CLIMB OF APPROX 1000 FPM AND DID NOT EXPERIENCE ANY LOSS OF SEPARATION OR LOSS OF AIRCRAFT CONTROL. WHAT CAUSED THE PROBLEM: 1) FAILURE TO FLY THE AIRPLANE AT A PROFILE THAT WOULD BEST AVOID THIS EVENT. 2) LACK OF ADEQUATE SEPARATION BY ATC/TOWER -- WE WERE CLEARED FOR TAKEOFF. 3) FLEX THRUST. FLEX THRUST WAS USED. IN RETROSPECT; IT MAY HAVE BEEN ADVANTAGEOUS TO TAKE-OFF WITH FULL POWER IN ORDER TO GAIN THE BENEFITS OF AN INCREASED CLIMB RATE AND AN EARLIER VR POINT ON THE RUNWAY. WHAT CAN PREVENT THE PROBLEM: 1) INSIST ON MORE SEPARATION FROM LARGER AIRCRAFT PRIOR TO BEING PUT IN TAKE-OFF SEQUENCE. 2) FULL POWER TAKE-OFF WHEN OPERATIONALLY FEASIBLE.
Data retrieved from NASA's ASRS site as of May 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.