Falcon 2000 captain reported an uncommanded 60 degree roll resulted from a wake turbulence encounter...

Narrative:

Descending on HYPER7 arrival in VMC conditions; smooth air; and winds (at our altitude) nearly nil. Just as [ZDC] called to assign hand-off to potomac TRACON we were jolted by wake turbulence. The airplane suddenly rolled 60 degrees to the right. Sic/PF disconnected autopilot and stabilized the aircraft. As quickly as the encounter occurred; it was over. ATC called to repeat the freq change. I replied; including report of wake encounter. By the time I switched to potomac they were calling us. I checked-in and acknowledged the new descent clearance (to 10;000 ft). After investigating TCAS (in below mode to see aircraft at our altitude and below that might be on the arrival ahead of us) I asked ATC to identify the type aircraft ahead of us (the only one I could see; now over hyper intersection). It was a B777; also flying the profile STAR. After communicating our wake encounter; TRACON issued vectors to take us off the STAR and away from the path of the proceeding aircraft. Minutes later the potomac controller inquired about the incident; flight conditions; aircraft damage; and whether anyone was hurt. That was good.the heavy was nearly 16nm ahead of us. That seems to be plenty enough separation to avoid a wake encounter. Even with winds aloft nearly zero; the standard rules regarding descent and dissipation of wake did not keep us from getting violently tossed. I am not aware of minimum separation requirements for enroute and arrival aircraft; but it was insufficient for these conditions.

Original NASA ASRS Text

Title: Falcon 2000 Captain reported an uncommanded 60 degree roll resulted from a wake turbulence encounter descending through 14;000 feet on arrival into IAD despite being 16 miles in trail of a B777.

Narrative: Descending on HYPER7 arrival in VMC conditions; smooth air; and winds (at our altitude) nearly nil. Just as [ZDC] called to assign hand-off to POTOMAC TRACON we were jolted by wake turbulence. The airplane suddenly rolled 60 degrees to the right. SIC/PF disconnected autopilot and stabilized the aircraft. As quickly as the encounter occurred; it was over. ATC called to repeat the freq change. I replied; including report of wake encounter. By the time I switched to POTOMAC they were calling us. I checked-in and acknowledged the new descent clearance (to 10;000 ft). After investigating TCAS (in BELOW mode to see aircraft at our altitude and below that might be on the arrival ahead of us) I asked ATC to identify the type aircraft ahead of us (the only one I could see; now over HYPER intersection). It was a B777; also flying the profile STAR. After communicating our wake encounter; TRACON issued vectors to take us off the STAR and away from the path of the proceeding aircraft. Minutes later the POTOMAC controller inquired about the incident; flight conditions; aircraft damage; and whether anyone was hurt. That was good.The heavy was nearly 16nm ahead of us. That seems to be plenty enough separation to avoid a wake encounter. Even with winds aloft nearly zero; the standard rules regarding descent and dissipation of wake did not keep us from getting violently tossed. I am not aware of minimum separation requirements for enroute and arrival aircraft; but it was insufficient for these conditions.

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.

Attributes
ACN	1391073
Time
Date	201609
Local Time Of Day	1801-2400
Place
Locale Reference	ZDC.ARTCC
State Reference	VA
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Falcon 2000
Operating Under FAR Part	Part 91
Flight Phase	Descent
Route In Use	STAR HYPER7
Flight Plan	IFR
Aircraft 2
Make Model Name	B777 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Descent
Route In Use	STAR HYPER7
Flight Plan	IFR
Person 1
Function	Captain Pilot Not Flying
Qualification	Flight Crew Instrument Flight Crew Air Transport Pilot (ATP) Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 40 Flight Crew Total 9600 Flight Crew Type 510
Events
Anomaly	Inflight Event / Encounter Loss Of Aircraft Control Inflight Event / Encounter Wake Vortex Encounter

Falcon 2000 captain reported an uncommanded 60 degree roll resulted from a wake turbulence encounter descending through 14;000 feet on arrival into iad despite being 16 miles in trail of a B777.