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A C414 encounters wake turbulence from a departing B727 at dca, dc. The C414 crosses the wake of the B727 twice and receives 2 sharp encounters with the wake.
| Attributes | |
| ACN | 374317 |
| Time | |
| Date | 199707 |
| Day | Tue |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : dca |
| State Reference | DC |
| Altitude | agl bound lower : 500 agl bound upper : 700 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : dca |
| Operator | general aviation : personal |
| Make Model Name | Chancellor 414A & C414 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | departure other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | B727 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | departure other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : single pilot |
| Qualification | pilot : instrument pilot : commercial pilot : cfi pilot : atp |
| Experience | flight time last 90 days : 45 flight time total : 10000 flight time type : 350 |
| ASRS Report | 374317 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : local |
| Qualification | controller : non radar |
| Events | |
| Anomaly | inflight encounter other other anomaly |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course flight crew : regained aircraft control |
| Consequence | other |
| Supplementary | |
| Air Traffic Incident | other |
Narrative:
Departed dca runway 15, runways 18 and 21 were also in use for arrs and departures. After takeoff and turning to intercept the noise abatement route approximately 400 ft AGL, aircraft encountered turbulence or wake turbulence. Aircraft and altitude were uncontrollable. After recovery, aircraft exited turbulence approximately 2 mi west of extended runway 18 centerline, southwest of airport. Continued on course. Remainder of climb out and en route uneventful. A corrective action would be to be more aware of possibility of turbulence and wake turbulence when operating from any airport, especially large airport with multiple runways in use. Callback conversation with reporter revealed the following information: reporter participated in the wake turbulence callback study. Reporter's aircraft hit the wake of departing B727 twice as he crossed it during his departure. First time was rated as a 3 in severity and the second time rated as a 5. His aircraft rolled as much as 60 degrees. His fright index was also very high as he stated several times. He feels he was not thinking about the possibility of the encounter, although he was aware of the fact he would be crossing the B727 flight path. As he stated, if he were to perform the same departure again, he would fly the aircraft either higher or lower as he went by the wake area.
Original NASA ASRS Text
Title: A C414 ENCOUNTERS WAKE TURB FROM A DEPARTING B727 AT DCA, DC. THE C414 CROSSES THE WAKE OF THE B727 TWICE AND RECEIVES 2 SHARP ENCOUNTERS WITH THE WAKE.
Narrative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
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.