B757 Undifferentiated or Other Model
Flight Crew Multiengine; Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP); Flight Crew Commercial
Flight Crew Total 3648.70; Flight Crew Type 3648.70
Troubleshooting; Confusion
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Published Material / Policy; Flight Deck / Cabin / Aircraft Event Other / Unknown; Ground Event / Encounter Other / Unknown
General Maintenance Action
Human Factors
During cockpit inspection; I noticed a RAT UNLOCKED EICAS message. After Maintenance was working to stow the turbine; it was brought to my attention that gate cameras showed it deploying 3 minutes after ACARS initiation. This leads me to believe that I inadvertently deployed it when I thought I was engaging the battery switch.
[Report narrative contained no additional information.]
Air carrier flight crew reported inadvertently deploying the Ram Air Turbine without any notification to ground personnel.