Date: 201911
Location: ZZZ.Airport, US
Flight conditions: VMC
Light: Dawn
Aircraft: B737-400
Operator: Air Carrier
Operating under: Part 121
Flight plan: IFR
Mission: Passenger
Flight phase: Climb
Airspace: Class B ZZZ
ATC / advisory: Tower ZZZ
Aircraft component: Electrical Distribution
Component problem: Malfunctioning
Reporter organization: Air Carrier
Reporter function: Captain; Pilot Not Flying
Reporter qualification: Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Second reporter function: First Officer; Pilot Flying
Anomaly: Aircraft Equipment Problem Critical
Detector: Person Flight Crew
When detected: In-flight
Result: Flight Crew Returned To Gate; Flight Crew FLC Overrode Automation; Flight Crew Returned To Departure Airport; General Maintenance Action; General Flight Cancelled / Delayed
Contributing factors: Aircraft
Primary problem: Aircraft

Narrative: After a normal preflight; we proceed to fuel 13;000 lbs of fuel and complete our normal routine. Everything was going normal until we start rotating the airplane; first we have anti-skid light inop on and auto brake light on at positive rate I try to rise the landing gear handle but it won't came up; we run the QRH I pull the trigger and rise the gear up. At 400 ft with the flaps up I try to engage Vnav but was not working; at the same time auto throttle stop working even when the lever and light still on in sequence we lost N1 on #1 and #2 we also lost EGT in both engines and trim failed light came on; First Officer lost the command bars and auto pilot. At this point I believe I have an electric problem; so many faults at the same time.I take the decision to return to [the departure airport]; we was vector for the ILS RWY XX; I prepared the plane for the approach run the proper check list and when we lowered the landing gear we have nose landing gear RED LIGHT; right main landing gear RED LIGHT and Green left landing gear light we start running the check list for landing gear disagree; I requested a low pass by the tower to make sure I have gear down. At this moment my major concerns are the electrical; I fear an electric fire. I took the controls and landed safely. Before applying manual brakes; I feel the aircraft braking and when I brake it was more intense than my inputs. No thrust reverses.


Second narrative: After a normal preflight; aircraft was loaded; fueled to 13000 lbs and taxied out within a few minutes of departure time. After start and before takeoff checks were normal as we taxied to the active runway XYR. Takeoff power was confirmed and it was a normal acceleration with no abnormal indications until V1 when the anti-skid and auto brakes fail lights came on. We continued a normal takeoff until gear retraction at positive climb. As PF (Pilot Flying); I noticed the Cpt (PM) (Captain; Pilot Monitoring); was having difficulty in raising the gear. I had to concentrate on airspeed acceleration and flap retraction schedule. Those went normally but when commanding VNAV; it would not engage nor would the auto throttles accelerate or the auto-pilot engage.While operating the aircraft manually; we followed ATC instruction for further climb and a southbound heading while the Capt. made the decision to return to the airport. We were given a clearance back to ZZZ and proceeded downwind for runway XX while initiating decent and approach checklists and running QRH procedures for the landing gear. At this point the Cpt. asked for control of the aircraft and I became PM completing all checklists. We requested a 'low-pass' flyby of the Tower to ascertain that the gear was down; which they confirmed and then we were given vectors to continue downwind for runway XX for approach.


Synopsis: Flight Crew reported loss of electrical systems on takeoff resulted in multiple systems failures and an air turn back.