Large Transport; Low Wing; 2 Turbojet Eng
Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 228
Conflict NMAC; Deviation / Discrepancy - Procedural Clearance
Flight Crew Took Evasive Action
Airspace Structure
TCAS RA at roughly 800 feet for helicopters operating within the departure corridor of BOS Runway 27 HYLAND 4 RNAV Departure. At or about flap retraction/acceleration altitude received TCAS RA for helicopters. On board Indications showed 300 feet vertical separation over TCAS target helicopter. Maneuvered to the left (south) which showed 500 feet of vertical separation over the black and white helicopter with north facing attitude. Flew TCAS RA guidance keeping flaps at the current configuration. Advised tower of TCAS RA and was given instructions to maneuver as required.
[Report narrative contained no additional information.]
Air carrier flight crew taking off from Runway 27 at BOS took evasive action responding to 2 TCAS RAs to avoid helicopters on departure.