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Learjet 45 captain reported experiencing 'violent' wake turbulence on the PUFFR4 RNAV arrival into apa in trail of a B737.
| Attributes | |
| ACN | 1443520 |
| Time | |
| Date | 201704 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ZDV.ARTCC |
| State Reference | CO |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Learjet 45 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | Descent |
| Route In Use | STAR PUFFR4 |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | B737 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Descent |
| Route In Use | STAR PUFFR4 |
| Flight Plan | IFR |
| Person 1 | |
| Function | Pilot Flying Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) Flight Crew Multiengine Flight Crew Instrument |
| Experience | Flight Crew Last 90 Days 100 Flight Crew Total 12500 Flight Crew Type 1000 |
| Events | |
| Anomaly | Inflight Event / Encounter Wake Vortex Encounter Inflight Event / Encounter Loss Of Aircraft Control |
Narrative:
While on PUFFR4 RNAV arrival for apa; when crossing slmon fix at FL210; we experienced wake turbulence in our lr-45 violent enough to roll the aircraft 30 degrees left then 30 degrees right in only a couple seconds and forceful enough to cause the autopilot to disconnect. I recognized the issue and reduced our pitch to change profile of our descent. I then asked ATC who we were following and they indicated a B737 10 miles ahead of us. I asked for off the profile and was given vectors and descent south off the arrival with no further incident. Have had multiple encounters of this type over last couple of years directly associated with 'descend via' clearances on RNAV arrivals which put all aircraft on the same descent profile while crossing fixes at specific altitude windows which I believe is creating dangerous wake turbulence encounters.
Original NASA ASRS Text
Title: Learjet 45 Captain reported experiencing 'violent' wake turbulence on the PUFFR4 RNAV Arrival into APA in trail of a B737.
Narrative: While on PUFFR4 RNAV arrival for APA; when crossing SLMON fix at FL210; we experienced wake turbulence in our LR-45 violent enough to roll the aircraft 30 degrees left then 30 degrees right in only a couple seconds and forceful enough to cause the autopilot to disconnect. I recognized the issue and reduced our pitch to change profile of our descent. I then asked ATC who we were following and they indicated a B737 10 miles ahead of us. I asked for off the profile and was given vectors and descent south off the arrival with no further incident. Have had multiple encounters of this type over last couple of years directly associated with 'descend via' clearances on RNAV arrivals which put all aircraft on the same descent profile while crossing fixes at specific altitude windows which I believe is creating dangerous wake turbulence encounters.
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.