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A challenger 604 flight crew experienced severe wake turbulence at FL370 from aircraft at same altitude, 12 mi ahead. A passenger was injured.
| Attributes | |
| ACN | 575616 |
| Time | |
| Date | 200303 |
| Day | Fri |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : ely.airport |
| State Reference | NV |
| Altitude | msl bound lower : 37000 msl bound upper : 37200 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zoa.artcc |
| Operator | general aviation : corporate |
| Make Model Name | Challenger CL604 |
| Operating Under FAR Part | Part 91 |
| Navigation In Use | other |
| Flight Phase | cruise : level |
| Route In Use | enroute airway : j84.airway |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zoa.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : corporate |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : multi engine pilot : instrument pilot : commercial pilot : cfi pilot : atp |
| Experience | flight time last 90 days : 50 flight time total : 20400 flight time type : 11200 |
| ASRS Report | 575616 |
| Person 2 | |
| Affiliation | company : corporate |
| Function | flight crew : first officer |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude inflight encounter : wake turbulence other anomaly |
| Independent Detector | other flight crewa other flight crewb |
| Resolutory Action | controller : issued new clearance flight crew : returned to assigned altitude flight crew : took evasive action flight crew : took precautionary avoidance action other |
| Consequence | other |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Airspace Structure Environmental Factor ATC Human Performance Aircraft |
| Primary Problem | Environmental Factor |
Narrative:
While in cruise at FL370, 1 hour 5 mins into the flight from sjc-teb, we encountered severe wake turbulence from an airliner (unknown type) 12 mi ahead of us at same altitude. The event was immediate (no warning) and severe causing the aircraft to roll (30-45 degrees) violently and sustained negative g-forces for approximately 2-3 seconds, and a loss of altitude of 300 ft. Recovery maneuver caused a gain of +200 ft (FL372). Total event time line approximately 10 seconds. Altitude and event were reported to ATC. Offset routing was then requested. Minor injury of 1 passenger who was unbelted and hit ceiling, then floor of aircraft, bruising tail bone. Seatbelt sign placed 'on' at first opportunity. Remainder of flight uneventful.
Original NASA ASRS Text
Title: A CHALLENGER 604 FLT CREW EXPERIENCED SEVERE WAKE TURB AT FL370 FROM ACFT AT SAME ALT, 12 MI AHEAD. A PAX WAS INJURED.
Narrative: WHILE IN CRUISE AT FL370, 1 HR 5 MINS INTO THE FLT FROM SJC-TEB, WE ENCOUNTERED SEVERE WAKE TURB FROM AN AIRLINER (UNKNOWN TYPE) 12 MI AHEAD OF US AT SAME ALT. THE EVENT WAS IMMEDIATE (NO WARNING) AND SEVERE CAUSING THE ACFT TO ROLL (30-45 DEGS) VIOLENTLY AND SUSTAINED NEGATIVE G-FORCES FOR APPROX 2-3 SECONDS, AND A LOSS OF ALT OF 300 FT. RECOVERY MANEUVER CAUSED A GAIN OF +200 FT (FL372). TOTAL EVENT TIME LINE APPROX 10 SECONDS. ALT AND EVENT WERE RPTED TO ATC. OFFSET ROUTING WAS THEN REQUESTED. MINOR INJURY OF 1 PAX WHO WAS UNBELTED AND HIT CEILING, THEN FLOOR OF ACFT, BRUISING TAIL BONE. SEATBELT SIGN PLACED 'ON' AT FIRST OPPORTUNITY. REMAINDER OF FLT UNEVENTFUL.
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.