A B777 crew, following a DC10 on descent, encountered wake turbulence at FL366.

Attributes
ACN	525868
Time
Date	200109
Day	Tue
Local Time Of Day	1801 To 2400
Place
Locale Reference	navaid : ckh.vortac
State Reference	HI
Altitude	msl single value : 36600
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	artcc : zzz.artcc
Operator	common carrier : air carrier
Make Model Name	B777 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	descent : intermediate altitude
Flight Plan	IFR
Aircraft 2
Controlling Facilities	artcc : zzz.artcc
Operator	common carrier : air carrier
Make Model Name	DC-10 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	cruise : level
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time type : 1260
ASRS Report	525868
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time total : 10000 flight time type : 451
ASRS Report	525933
Events
Anomaly	cabin event other inflight encounter : wake turbulence
Independent Detector	other flight crewa other flight crewb
Resolutory Action	controller : issued new clearance
Consequence	faa : reviewed incident with flight crew other
Supplementary
Problem Areas	ATC Human Performance Flight Crew Human Performance Environmental Factor
Primary Problem	Environmental Factor

Narrative:

We were descending from FL390 through FL366 when we hit wake turbulence from air carrier X which was 11 mi ahead of us. I leveled off and added power to get above their descent profile. The wake turbulence was over in a few seconds. ATC could not believe that we had hit air carrier X wake turbulence, but we did. Finally ATC gave me the requested left or right turn. The rest of the flight was uneventful. At the gate, I asked if anyone was hurt and then found out 1 flight attendant hurt her ankle and cut a finger. No passenger were injured. I am not sure how I will prevent this in the future. 11 mi should be enough, but it wasn't. Supplemental information from acn 525933: we were given a descent clearance to 10000 ft. Just after we began our descent, we encountered wake turbulence from a preceding DC10. My copilot was flying and talking to ATC while I was listening to ATIS. He immediately asked for clearance north or south of course and then leveled off. The encounter was over in just a few seconds. We flew north of our course about 2 mi then went direct to bambo. No other turbulence occurred. After landing, we learned that 1 flight attendant cut her thumb and slightly twisted her ankle during the encounter. I don't know her name.

Original NASA ASRS Text

Title: A B777 CREW, FOLLOWING A DC10 ON DSCNT, ENCOUNTERED WAKE TURB AT FL366.

Narrative: WE WERE DSNDING FROM FL390 THROUGH FL366 WHEN WE HIT WAKE TURB FROM ACR X WHICH WAS 11 MI AHEAD OF US. I LEVELED OFF AND ADDED PWR TO GET ABOVE THEIR DSCNT PROFILE. THE WAKE TURB WAS OVER IN A FEW SECONDS. ATC COULD NOT BELIEVE THAT WE HAD HIT ACR X WAKE TURB, BUT WE DID. FINALLY ATC GAVE ME THE REQUESTED L OR R TURN. THE REST OF THE FLT WAS UNEVENTFUL. AT THE GATE, I ASKED IF ANYONE WAS HURT AND THEN FOUND OUT 1 FLT ATTENDANT HURT HER ANKLE AND CUT A FINGER. NO PAX WERE INJURED. I AM NOT SURE HOW I WILL PREVENT THIS IN THE FUTURE. 11 MI SHOULD BE ENOUGH, BUT IT WASN'T. SUPPLEMENTAL INFO FROM ACN 525933: WE WERE GIVEN A DSCNT CLRNC TO 10000 FT. JUST AFTER WE BEGAN OUR DSCNT, WE ENCOUNTERED WAKE TURB FROM A PRECEDING DC10. MY COPLT WAS FLYING AND TALKING TO ATC WHILE I WAS LISTENING TO ATIS. HE IMMEDIATELY ASKED FOR CLRNC N OR S OF COURSE AND THEN LEVELED OFF. THE ENCOUNTER WAS OVER IN JUST A FEW SECONDS. WE FLEW N OF OUR COURSE ABOUT 2 MI THEN WENT DIRECT TO BAMBO. NO OTHER TURB OCCURRED. AFTER LNDG, WE LEARNED THAT 1 FLT ATTENDANT CUT HER THUMB AND SLIGHTLY TWISTED HER ANKLE DURING THE ENCOUNTER. I DON'T KNOW HER NAME.

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.