A givsp flight crew reported a severe wake vortex encounter in trail of a B737 on arrival to dfw. AT...

Narrative:

ATC had cleared our aircraft to descend to FL240; 40 west of ukw and maintain 310 KTS when able. Center at no time advised us of traffic in front of us for the potential of wake turbulence. Upon leaving FL300 encountered severe wake turbulence from aircraft on same clearance 12 miles in front of us. Aircraft rolled violently to left and then back to right. Autopilot disengaged; auto throttles disengaged and flight guidance computer temporarily failed. Captain regained control of aircraft just as ATC was handing us of to another. We reported the severe turbulence to the controller prior to switching to the new frequency. We checked in and the aircraft had slowed down below 310 KTS. We were trying ensure that the integrity of the aircraft had not been compromised. Our flight attendant had been thrown about the cabin and had come forward to let us know she was okay. The captain had been able to re-engage the autopilot; auto throttles; flight guidance computer and was in the process of accelerating back to 310 KTS. The ft worth air traffic controller began to berate us for slowing down and was not interested in the 'severe wake turbulence' we had encountered. I believe center having realized what they had done vectored us off the arrival away from the traffic. The controller advised us that our slowing constituted a deviation but they were not going to have us call in. The controller stated the aircraft in front of us was a 737 but couldn't understand why we encountered wake turbulence but that we should have maintained our speed and proximity to that aircraft. He seemed to be more concerned with keeping [the 737] on schedule rather than maintaining a safe separation.

Original NASA ASRS Text

Title: A GIVSP flight crew reported a severe wake vortex encounter in trail of a B737 on arrival to DFW. ATC was upset when they slowed below the assigned 310 KTS.

Narrative: ATC had cleared our aircraft to descend to FL240; 40 west of UKW and maintain 310 KTS when able. Center at no time advised us of traffic in front of us for the potential of wake turbulence. Upon leaving FL300 encountered severe wake turbulence from aircraft on same clearance 12 miles in front of us. Aircraft rolled violently to left and then back to right. Autopilot disengaged; auto throttles disengaged and flight guidance computer temporarily failed. Captain regained control of aircraft just as ATC was handing us of to another. We reported the severe turbulence to the Controller prior to switching to the new frequency. We checked in and the aircraft had slowed down below 310 KTS. We were trying ensure that the integrity of the aircraft had not been compromised. Our Flight Attendant had been thrown about the cabin and had come forward to let us know she was okay. The Captain had been able to re-engage the autopilot; auto throttles; flight guidance computer and was in the process of accelerating back to 310 KTS. The Ft Worth Air Traffic Controller began to berate us for slowing down and was not interested in the 'Severe Wake Turbulence' we had encountered. I believe Center having realized what they had done vectored us off the arrival away from the traffic. The Controller advised us that our slowing constituted a deviation but they were not going to have us call in. The Controller stated the aircraft in front of us was a 737 but couldn't understand why we encountered wake turbulence but that we should have maintained our speed and proximity to that aircraft. He seemed to be more concerned with keeping [the 737] on schedule rather than maintaining a safe separation.

Data retrieved from NASA's ASRS site as of April 2012 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.

Attributes
ACN	973319
Time
Date	201109
Local Time Of Day	1201-1800
Place
Locale Reference	ZFW.ARTCC
State Reference	TX
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Gulfstream IV / G350 / G450
Operating Under FAR Part	Part 135
Flight Phase	Descent
Flight Plan	IFR
Person 1
Function	Pilot Not Flying Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 50 Flight Crew Total 16000 Flight Crew Type 280
Person 2
Function	First Officer Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 80 Flight Crew Total 7800 Flight Crew Type 325
Events
Anomaly	ATC Issue All Types Deviation - Procedural Clearance Deviation - Speed All Types Inflight Event / Encounter Wake Vortex Encounter

A givsp flight crew reported a severe wake vortex encounter in trail of a B737 on arrival to dfw. ATC was upset when they slowed below the assigned 310 KTS.