EMB ERJ 170/175 ER/LR
Flight Crew Multiengine; Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument
Aircraft Equipment Problem Less Severe; Ground Event / Encounter Loss Of Aircraft Control; Inflight Event / Encounter Wake Vortex Encounter
General Maintenance Action
Procedure; Aircraft; Environment - Non Weather Related
On takeoff from RWY 24L at LAX; full length of runway used; we were the second aircraft to depart behind a B787 heavy that had departed from same runway at least 4 minutes earlier. On climb out we encountered what could have only been the 787 wake vortices; as there was no wind shear reported or forecast. At approximately 200 to 300 feet AGL while hand flying; the aircraft rolled left and right in quick succession to approximately 40 degrees of bank; then again at 500 to 600 feet AGL. A master caution posted multiple EICAS messages. There was no loss of speed or pitch control during either event. Normal use of aileron and rudder was used to counteract the rolling motion; excessive control input not used nor warranted. At 400 feet the 'NAV' mode was selected and at acceleration altitude 'VNAV; speed FMS' was the mode called for on guidance panel. Once aircraft was stable in speed; pitch; roll; and yaw; the autopilot was engaged. I then assigned flying pilot duties to First Officer (FO); and proceeded to run QRH for the following faults: 'Wind shear fail' 'stall prot fail' 'AOA limit fail'; followed a couple of minutes later with 'AT fail'. [I] liaised with Dispatch via ACARS; agreed it was safe to continue in clear and smooth weather. Applied all necessary QRH factors and landed without further incident with a buttery smooth touchdown on the longest runway. On touchdown the EICAS messages all depopulated and were replaced with 'ADS Probe 1;2;3;4; fail'. Parked; [and] Contract Maintenance was summoned and a 10 minute power reset fixed the problem.
EMB-175 Captain reported multiple EICAS system failures were annunciated following a wake turbulence encounter departing LAX in trail of a B787.