Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP); Flight Crew Multiengine
Confusion; Communication Breakdown
ATC Issue All Types; Deviation - Speed All Types; Deviation / Discrepancy - Procedural FAR
General None Reported / Taken
Airspace Structure; Human Factors; Procedure
We were just west/northwest of FRG airport. We were at 250 KTS and 4;000 FT. ATC clears us from 4;000 FT to 3;000 FT . I'm the Pilot Monitoring so I'm on the radio. I'm looking at the Class B chart on my iPad. I asked ATC; 'Doesn't this put us under the Class B airspace?' ATC responds; 'Yes; but you'll re-enter in about 1 1/2 miles.' Then he says; 'Can you just descend to 3;000 FT please.' On this aircraft; I can't slow down from 250 KTS to 200 KTS and descend and the Controller obviously needed us to descend now. We descended from 4;000 FT to 3;000 FT. I think the delay may have kept us in the Class B; but I can't be sure. There was no traffic on TCAS or any TCAS alert. We could visually see that there was no traffic under us; approaching us. I accepted the clearance because; first; it seemed like he needed us at 3;000 and I assume; given his response; that he sees something that we cannot so it's safer to descend. I could use some guidance; am I in violation of the FARs when a Controller asks me to descend below the Class B airspace over 200 KTS for a short period of time?
Air carrier Captain reported being cleared to descend below JFK Class Bravo airspace at a speed above 200 KTS.