B757-200
Flight Crew Multiengine; Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument
Troubleshooting
Aircraft Equipment Problem Critical
Air Traffic Control Provided Assistance; Flight Crew Returned To Departure Airport; Flight Crew Requested ATC Assistance / Clarification; Flight Crew Overcame Equipment Problem; Flight Crew Landed in Emergency Condition
Aircraft
This was a routine flight from ZZZ to ZZZ1; in a B757. We had a normal push back; cross bleed start and taxi. On the takeoff roll; we rotated on speed and pitched to approximately 15 degrees. Noted the airspeed appeared to accelerate in the climb more than normal so I pitched through the flight director to stop at 20 degrees but that did not arrest the abnormal airspeed acceleration. Around 1;000 to 1;500 feet in normal configuration (flaps 5; standard takeoff power and pitched just below twenty degrees) the airspeed entered the red over-speed tape. At the same time we received multiple master warning lights and bells; master caution; clacker; and multiple failure notifications of electrical and avionics in nature (such as red OVSPD; Rudder ratio; Mach Speed Trim; ATC fault; GEN DRIVE; Left EEC; Right EEC etc.). The Captain's instruments indicated over 400 knots and over 40;000 feet of altitude. The Captain and I agreed the standby instrument appeared normal around 185 knots in a climb. I disconnected auto throttles; switched off flight director and recovered the airplane at 180 knots leveling off at 4;000 feet using standby instruments and flaps 5. The Captain noted it appeared my instruments began returning to normal to match the standby instruments. The Captain's complete instrument suite remained failed through the rest of the event. The Captain requested priority handling] and an air turn back with vectors for Runway XX. One attempt was made to re-engage the flight director and autopilot to no avail. Uneventfully; we hand flew a VFR approach to landing. We then had a normal taxi to our remote gate and released Fire Rescue vehicles from assistance.
B757-200 First Officer reported multiple alerts and a total loss of the Captain's instrument suite on initial climb; resulting in a return to departure airport.