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Ce-560XLS captain reported multiple routing and altitude changes from ATC to avoid wake encounters.
| Attributes | |
| ACN | 1549474 |
| Time | |
| Date | 201806 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ZBW.ARTCC |
| State Reference | NH |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Citation Excel (C560XL) |
| Operating Under FAR Part | Part 135 |
| Flight Phase | Cruise |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | B747-400 |
| Flight Phase | Cruise |
| Flight Plan | IFR |
| Person 1 | |
| Function | Captain Pilot Flying |
| Qualification | Flight Crew Instrument Flight Crew Air Transport Pilot (ATP) Flight Crew Multiengine |
| Events | |
| Anomaly | ATC Issue All Types |
Narrative:
While enroute [to] cyqb; we had 3 close calls with wake turbulence due to aircraft separation of only 1;000 feet. Departed for cyqb. There were 2 route changes after new york ARTCC handed [us] to boston ARTCC. Boston center cleared [us] to climb to FL290; then changed it to FL270; then FL250. Then; boston advised [us] of crossing traffic right to left B747-400 at FL260. Boston advised a frequency change; we contacted boston for a heading change to avoid wake turbulence. The B747-400 crossed ahead of our flight path and barely gave us enough time during a frequency change (boston) and ask for a heading change to avoid the wake turbulence.the second separation occurred 30NM south of mpv VOR at FL370. We had an airbus 321 at FL380 pass right to left; off the nose with only 1;000 feet separation. Again; we contacted boston for a heading change to avoid the wake turbulence. Boston ARTCC handed [us] to canada ARTCC. Five minutes after entering canadian airspace; at FL350; the controller advised an airbus crossing our flight path at FL360 right to left. Then; canadian ARTCC cleared [us for] a descent to FL290; which kept our flight path away from the wake turbulence of the passing airbus.suggestions: smaller private jets including the cessna citation xl/xls should be operating above heavy airplanes; not below. The wake turbulence generated from heavy aircraft (B747/B787 & airbus) descends more than 1;000 feet below their flight path; should be avoided; and could detrimental to smaller aircraft.
Original NASA ASRS Text
Title: CE-560XLS Captain reported multiple routing and altitude changes from ATC to avoid wake encounters.
Narrative: While enroute [to] CYQB; we had 3 close calls with wake turbulence due to aircraft separation of only 1;000 feet. Departed for CYQB. There were 2 route changes after New York ARTCC handed [us] to Boston ARTCC. Boston Center cleared [us] to climb to FL290; then changed it to FL270; then FL250. Then; Boston advised [us] of crossing traffic right to left B747-400 at FL260. Boston advised a frequency change; we contacted Boston for a heading change to avoid wake turbulence. The B747-400 crossed ahead of our flight path and barely gave us enough time during a frequency change (Boston) and ask for a heading change to avoid the wake turbulence.The second separation occurred 30NM south of MPV VOR at FL370. We had an Airbus 321 at FL380 pass right to left; off the nose with only 1;000 feet separation. Again; we contacted Boston for a heading change to avoid the wake turbulence. Boston ARTCC handed [us] to Canada ARTCC. Five minutes after entering Canadian airspace; at FL350; the Controller advised an Airbus crossing our flight path at FL360 right to left. Then; Canadian ARTCC cleared [us for] a descent to FL290; which kept our flight path away from the wake turbulence of the passing Airbus.Suggestions: Smaller private jets including the Cessna Citation XL/XLS should be operating above Heavy Airplanes; not below. The wake turbulence generated from Heavy aircraft (B747/B787 & Airbus) descends more than 1;000 feet below their flight path; should be avoided; and could detrimental to smaller aircraft.
Data retrieved from NASA's ASRS site 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.