B777-200 encounters severe turbulence on descent into jfk.

Attributes
ACN	601405
Time
Date	200312
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : jfk.airport
State Reference	NY
Altitude	msl single value : 11000
Environment
Weather Elements	Turbulence Windshear
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : n90.tracon
Operator	common carrier : air carrier
Make Model Name	B777-200
Operating Under FAR Part	Part 121
Flight Phase	descent : approach descent : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : relief pilot
Qualification	pilot : atp
Experience	flight time last 90 days : 210 flight time total : 10000 flight time type : 3974
ASRS Report	601405
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
ASRS Report	601288
Events
Anomaly	inflight encounter : turbulence other anomaly
Independent Detector	other flight crewa
Resolutory Action	flight crew : exited adverse environment
Consequence	other
Supplementary
Problem Areas	Weather Flight Crew Human Performance Environmental Factor Aircraft ATC Human Performance
Primary Problem	Weather

Narrative:

On approach into jfk, we experienced several jolts that at first seemed like wake turbulence. We experienced about a 60 KT windshear at about 11000-10000 ft. The wind speed changed from 115 KTS to 45 KTS and shifted directions 180 degrees within a matter of seconds. Along with this, we experienced large and abrupt changes in altitude and airspeed which we briefly discussed and were in agreement to classify the turbulence as severe. We reported this to approach who said he was aware, yet he had given us no indication and no further information. No one was hurt and the aircraft landed uneventfully.

Original NASA ASRS Text

Title: B777-200 ENCOUNTERS SEVERE TURB ON DSCNT INTO JFK.

Narrative: ON APCH INTO JFK, WE EXPERIENCED SEVERAL JOLTS THAT AT FIRST SEEMED LIKE WAKE TURB. WE EXPERIENCED ABOUT A 60 KT WINDSHEAR AT ABOUT 11000-10000 FT. THE WIND SPD CHANGED FROM 115 KTS TO 45 KTS AND SHIFTED DIRECTIONS 180 DEGS WITHIN A MATTER OF SECONDS. ALONG WITH THIS, WE EXPERIENCED LARGE AND ABRUPT CHANGES IN ALT AND AIRSPD WHICH WE BRIEFLY DISCUSSED AND WERE IN AGREEMENT TO CLASSIFY THE TURB AS SEVERE. WE RPTED THIS TO APCH WHO SAID HE WAS AWARE, YET HE HAD GIVEN US NO INDICATION AND NO FURTHER INFO. NO ONE WAS HURT AND THE ACFT LANDED UNEVENTFULLY.

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.