Flight Crew Air Transport Pilot (ATP); Flight Crew Flight Instructor; Flight Crew Instrument; Flight Crew Multiengine
Flight Crew Last 90 Days 175; Flight Crew Total 3800; Flight Crew Type 850
Time Pressure; Situational Awareness
Conflict NMAC
Flight Crew Took Evasive Action
Procedure; Airspace Structure
We were descending into ACK in VMC while VFR. Passing about 5;500 we visually acquired traffic at our 11 o'clock. The traffic page of our MFD indicated he was at a range of 10 miles. Shortly after we acquired the traffic Cape Approach warned us of the same traffic and said they were westbound at 4;500 FT. Upon passing through 4;500 FT during our descent the conflicting traffic was approximately 4 miles from us at our 11 o'clock position and began to descend. At approximately 2 miles he began a left turn toward us. His aircraft no longer had any relative movement and was coming directly at us. The lights of his aircraft were getting more vivid by the second. The pilot flying and I both pulled back on the yoke to initiate and very steep climb to avoid the other aircraft. During our climb the TCAS alerted us to the traffic. I watched the other aircraft pass below our aircraft from left to right. This situation is another example of why looking outside the aircraft for conflicting traffic is so important.
The turboprop was eastbound to ACK receiving VFR advisories. I observed a westbound 1200 code (acft Y) at 4;500 (not in communication with ATC). I issued traffic to the turboprop - 11 o'clock; 5 miles; opposite direction at 4;500. He reported the traffic in site. I observed the westbound traffic descending and updated the turboprop with that trend. He asked if we were in communication with the other aircraft to which I informed him we were not. I told the turboprop pilot it appeared the other aircraft turned toward him and descended to which he replied that was exactly what he did. I immediately informed the FLM.Shortly after acft Y called for advisories.Yesterday I learned that the turboprop pilot had filed a NMAC.
A turboprop pilot and two K90 controllers reported a near miss near ACK in ZBW airspace between one VFR aircraft with flight following and another VFR aircraft with no communications.