Citation Excel (C560XL)
Flight Crew Multiengine; Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP)
Situational Awareness; Communication Breakdown; Distraction
Deviation - Altitude Crossing Restriction Not Met; Deviation - Altitude Undershoot; Deviation / Discrepancy - Procedural Clearance; Inflight Event / Encounter Wake Vortex Encounter
General None Reported / Taken
Human Factors; Procedure; Environment - Non Weather Related
On ROBUC3 STAR into Boston Logan; ATC gave late descend via instruction; FMS failed to descend aircraft; we descended then in Vertical Speed mode to try and make PROVI intersection at 11;000 feet. We were crossing at 12;000 feet when ATC issued a turn and a lower altitude. Complicating the situation was a wake turbulence encounter and frequency saturation.We did our best under the circumstances. In the future I will manually descend when well inside the STAR and issued a late descend via clearance.
On arrival into Boston Logan during the Captain's approach briefing I was given a descent via the Robuc3 arrival. During the descent I encountered significant wake turbulence. I immediately disconnected the autopilot and informed the Captain of the situation. After the aircraft was stabilized we transferred controls but due to the disruption we were unable to make the next crossing restriction at PROVI. We were approximately 1000 feet above the altitude. The controller issued instructions for a vector off of the arrival; we complied and the flight continued without event.
CE-560XL flight crew reported failing to make a crossing restriction on descent into BOS; citing a late clearance and a wake turbulence encounter.