B757-200
Flight Crew Multiengine; Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP)
Flight Crew Type 6808
Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor
Flight Crew Diverted; Flight Crew Landed As Precaution; General Maintenance Action
Aircraft
During climb through FL250 we noticed a very strong odor that we thought was an electrical fire. We completed the appropriate checklists and then requested the lead FA (Flight Attendant) to come to the cockpit. Upon entering the cockpit the FA stated 'what's burning' which helped us verify our suspicions of an electrical fire. The odor did diminish some but not completely after running the checklists. We then decided to divert and make an overweight landing.
Upon climbing from FL230 to FL310 approximately 20 minutes into flight; FO (Flight Officer) smelled a strong odor of electrical fumes (acrid odor) with no associated smoke. Captain also smelled it. Flight Attendant was called up to cockpit and confirmed the smell. Smoke/Fire/Fumes QRC/QRH was performed. Odor subsided after checklist was performed and crew decided to divert. Dispatch was notified via ACARS. Captain performed an overweight landing at 224K lbs and taxied to gate uneventfully. Flight conditions were IMC in rain at night near thunderstorms (with occasional St Elmo's fire phenomena across the windscreen) for most of the flight until weather improved enough for a visual approach. Once parked; Maintenance noticed the residual smell upon entering cockpit.
B757 flight crew reported electrical fumes and diverting to alternate airport.