Falcon 900 first officer reported encountering wake turbulence that rolled the aircraft to a 90 degr...

Narrative:

We were descending on the fisel 7 arrival. Instructed to descend to 15;000 feet after fathr waypoint. We experienced moderate wake turbulence. I contacted ATC and asked them what kind of aircraft is flying in front of us; they told us it's an A350. They said would we like to offset 10 degrees. I asked the captain; then suggested we take the offset but he said we should be ok. ATC said the airbus is 10 miles ahead of us. We could see the aircraft and it didn't look 10 miles away. We again experienced moderate wake turbulence; both times autopilot disengaged and the aircraft snapped to the right. It felt like a 90 degree snap bank. At this times I told ATC we encountered the wake turbulence again and need to offset at least 10 degrees. From that point on they took us off the arrival and gave us vectors. We were still following the aircraft on the ILS 10 left; and tried to stay a little above the glide slope since we were cleared for the visual. ATC did not mention caution wake turbulence on our initial descent. The only time we received the caution wake turbulence was after we were cleared to intercept the localizer and then cleared for the visual; and by tower when we were cleared to land. Needs to be larger separation between heavy and corporate jets. Also pilots need to be informed of what kind of aircraft they are following.

Original NASA ASRS Text

Title: Falcon 900 First Officer reported encountering wake turbulence that rolled the aircraft to a 90 degree bank while descending on the FISEL7 Arrival into FLL in trail of an A350.

Narrative: We were descending on the FISEL 7 Arrival. Instructed to descend to 15;000 feet after FATHR waypoint. We experienced moderate wake turbulence. I contacted ATC and asked them what kind of aircraft is flying in front of us; they told us it's an A350. They said would we like to offset 10 degrees. I asked the Captain; then suggested we take the offset but he said we should be ok. ATC said the Airbus is 10 miles ahead of us. We could see the aircraft and it didn't look 10 miles away. We again experienced moderate wake turbulence; both times autopilot disengaged and the aircraft snapped to the right. It felt like a 90 degree snap bank. At this times I told ATC we encountered the wake turbulence again and need to offset at least 10 degrees. From that point on they took us off the arrival and gave us vectors. We were still following the aircraft on the ILS 10 L; and tried to stay a little above the glide slope since we were cleared for the visual. ATC did not mention caution wake turbulence on our initial descent. The only time we received the caution wake turbulence was after we were cleared to intercept the localizer and then cleared for the visual; and by Tower when we were cleared to land. Needs to be larger separation between heavy and corporate jets. Also pilots need to be informed of what kind of aircraft they are following.

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	1635741
Time
Date	201904
Local Time Of Day	1201-1800
Place
Locale Reference	FLL.Airport
State Reference	FL
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Falcon 900
Operating Under FAR Part	Part 91
Flight Phase	Descent
Flight Plan	IFR
Aircraft 2
Make Model Name	A350
Operating Under FAR Part	Part 121
Flight Phase	Descent
Flight Plan	IFR
Person 1
Function	Pilot Not Flying First Officer
Qualification	Flight Crew Instrument Flight Crew Multiengine Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	ATC Issue All Types Deviation - Track / Heading All Types Inflight Event / Encounter Loss Of Aircraft Control Inflight Event / Encounter Wake Vortex Encounter

Falcon 900 first officer reported encountering wake turbulence that rolled the aircraft to a 90 degree bank while descending on the FISEL7 arrival into fll in trail of an A350.