B737NG captain reported encountering wake turbulence 7 miles in trail of another B737 on descent int...

Attributes
ACN	1571161
Time
Date	201808
Place
Locale Reference	F11.TRACON
State Reference	FL
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	B737 Next Generation Undifferentiated
Operating Under FAR Part	Part 121
Flight Phase	Descent
Route In Use	STAR CWORLD
Flight Plan	IFR
Aircraft 2
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Descent
Flight Plan	IFR
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Multiengine
Events
Anomaly	ATC Issue All Types Inflight Event / Encounter Loss Of Aircraft Control Inflight Event / Encounter Wake Vortex Encounter

Narrative:

On the cworld arrival to orlando we were separated [from] another 737 by 7 miles. At cworld we encountered increasing intensity wake turbulence descending through 12;000' to mco. At one point the aircraft rapidly rolled right approximately 40+ degrees of bank with the autopilot connected and LNAV and VNAV engaged. I promptly disconnected the autopilot and rolled wings level. During the upset the egpws (enhanced ground proximity warning system) announced bank angle but the upset was quickly corrected. After recovery I offset the arrival by .5 miles to the right of course for about 10 miles while we connected the autopilot again in heading and vertical speed. The alarming issue however was not so much the upset but the cavalier attitude of air traffic controllers. When we announced the lateral deviation due to wake turbulence they said we were 'only' following a 737 and he was 7 miles ahead of us. They did not believe nor did they take seriously the fact that we encountered wake turbulence strong enough to roll us to 40+ degrees of bank rapidly by 'just a 737'.

Original NASA ASRS Text

Title: B737NG Captain reported encountering wake turbulence 7 miles in trail of another B737 on descent into MCO that rolled the aircraft into a 40 degree bank.

Narrative: On the CWORLD Arrival to Orlando we were separated [from] another 737 by 7 miles. At CWORLD we encountered increasing intensity wake turbulence descending through 12;000' to MCO. At one point the aircraft rapidly rolled right approximately 40+ degrees of bank with the autopilot connected and LNAV and VNAV engaged. I promptly disconnected the autopilot and rolled wings level. During the upset the EGPWS (Enhanced Ground Proximity Warning System) announced bank angle but the upset was quickly corrected. After recovery I offset the arrival by .5 miles to the right of course for about 10 miles while we connected the autopilot again in HDG and Vertical Speed. The alarming issue however was not so much the upset but the cavalier attitude of air traffic controllers. When we announced the lateral deviation due to wake turbulence they said we were 'only' following a 737 and he was 7 miles ahead of us. They did not believe nor did they take seriously the fact that we encountered wake turbulence strong enough to roll us to 40+ degrees of bank rapidly by 'just a 737'.

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.

B737NG captain reported encountering wake turbulence 7 miles in trail of another B737 on descent into mco that rolled the aircraft into a 40 degree bank.