Dc-10 captain reported wake turbulence encounter in trail of a B777 on arrival to mem and suggested ...

Narrative:

[We received a] momentary stall warning/activation due to encounter of B777 wake turbulence. ATC assigned us 210 KTS; and then descend to 6;000 ft at clark on the ltown arrival with a B777 ahead; around 6 mile range; and they were given same [clearance earlier]. Captain (pilot flying) using autopilot and descending on downwind; calm winds and aircraft began [to] roll right due to wake encounter approaching olivv intersection. Autopilot unable to counter roll to return to level flight; approaching approximately 15 deg bank; speed of 210 gave us foot +15 in clean configuration. While PF disconnected autopilot to return to level the bank angle; had momentary stall warning/stick shaker activation. Normal roll to wings level and stall recovery normal; with a short auto slat extension during encounter. Extended slats for added protection as we were being vectored along same B777 approach. No further encounters. Fom-required logbook entry and crew performed post flight visual inspection with no defects noted.mem approach controller should have notified us of B777 ahead; [and] applied greater separation distance on downwind arrival. Suggest that crews may need to consider use of 0/slat extended configuration while following B777 on initial arrival routes as aircraft is still relatively clean configuration and potential of greater wake production.

Original NASA ASRS Text

Title: DC-10 Captain reported wake turbulence encounter in trail of a B777 on arrival to MEM and suggested additional spacing might be a good idea.

Narrative: [We received a] momentary stall warning/activation due to encounter of B777 wake turbulence. ATC assigned us 210 KTS; and then descend to 6;000 FT at CLARK on the LTOWN arrival with a B777 ahead; around 6 mile range; and they were given same [clearance earlier]. Captain (pilot flying) using autopilot and descending on downwind; calm winds and aircraft began [to] roll right due to wake encounter approaching OLIVV Intersection. Autopilot unable to counter roll to return to level flight; approaching approximately 15 deg bank; speed of 210 gave us foot +15 in clean configuration. While PF disconnected autopilot to return to level the bank angle; had momentary stall warning/stick shaker activation. Normal roll to wings level and stall recovery normal; with a short auto slat extension during encounter. Extended slats for added protection as we were being vectored along same B777 approach. No further encounters. FOM-required logbook entry and crew performed post flight visual inspection with no defects noted.MEM Approach Controller should have notified us of B777 ahead; [and] applied greater separation distance on downwind arrival. Suggest that crews may need to consider use of 0/slat extended configuration while following B777 on initial arrival routes as aircraft is still relatively clean configuration and potential of greater wake production.

Data retrieved from NASA's ASRS site as of July 2013 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	1018371
Time
Date	201206
Local Time Of Day	0601-1200
Place
Locale Reference	MEM.Airport
State Reference	TN
Aircraft 1
Make Model Name	DC-10 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Descent
Flight Plan	IFR
Aircraft 2
Make Model Name	B777 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)
Events
Anomaly	Deviation - Speed All Types Inflight Event / Encounter Wake Vortex Encounter

Dc-10 captain reported wake turbulence encounter in trail of a B777 on arrival to mem and suggested additional spacing might be a good idea.