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Flight crew of medium large transport departing ord encounters what they believed to be the wake turbulence of a large transport that departed just before them.
| Attributes | |
| ACN | 149927 |
| Time | |
| Date | 199006 |
| Day | Sun |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : ord |
| State Reference | IL |
| Altitude | agl bound lower : 300 agl bound upper : 300 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : ord |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | climbout : initial climbout : takeoff |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | climbout : takeoff climbout : initial |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 50 flight time total : 5500 flight time type : 1500 |
| ASRS Report | 149927 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Events | |
| Anomaly | inflight encounter other other anomaly |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : regained aircraft control |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Ambiguous |
| Air Traffic Incident | other |
Narrative:
I am captain of an medium large transport. Told to expedite takeoff behind large transport on runway 32L at ord. We began takeoff roll as large transport rotated. He went straight out and we were to turn to 180 degrees. We started the turn at 300' AGL with 15 degrees angle of bank. We were violently increased to 30 degrees angle of bank from the apparent wake turbulence of the large transport. The copilot recovered smoothly and no one was injured. I wondered if the FAA or aircraft mfr had considered increased sep behind large transport aircraft because of wing design.
Original NASA ASRS Text
Title: FLT CREW OF MLG DEPARTING ORD ENCOUNTERS WHAT THEY BELIEVED TO BE THE WAKE TURBULENCE OF A LGT THAT DEPARTED JUST BEFORE THEM.
Narrative: I AM CAPT OF AN MLG. TOLD TO EXPEDITE TKOF BEHIND LGT ON RWY 32L AT ORD. WE BEGAN TKOF ROLL AS LGT ROTATED. HE WENT STRAIGHT OUT AND WE WERE TO TURN TO 180 DEGS. WE STARTED THE TURN AT 300' AGL WITH 15 DEGS ANGLE OF BANK. WE WERE VIOLENTLY INCREASED TO 30 DEGS ANGLE OF BANK FROM THE APPARENT WAKE TURB OF THE LGT. THE COPLT RECOVERED SMOOTHLY AND NO ONE WAS INJURED. I WONDERED IF THE FAA OR ACFT MFR HAD CONSIDERED INCREASED SEP BEHIND LGT ACFT BECAUSE OF WING DESIGN.
Data retrieved from NASA's ASRS site as of July 2007 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.