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Air carrier flight crew reported inadvertently deploying the ram air turbine without any notification to ground personnel.
| Attributes | |
| ACN | 1595382 |
| Time | |
| Date | 201811 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ORD.Airport |
| State Reference | IL |
| Aircraft 1 | |
| Make Model Name | B757 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Parked |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | DC Ram Air Turbine |
| Person 1 | |
| Function | First Officer |
| Qualification | Flight Crew Multiengine Flight Crew Instrument Flight Crew Air Transport Pilot (ATP) Flight Crew Commercial |
| Experience | Flight Crew Total 3648.70 Flight Crew Type 3648.70 |
| Person 2 | |
| Function | Captain |
| Qualification | Flight Crew Commercial Flight Crew Multiengine Flight Crew Instrument Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 100 Flight Crew Total 25900 Flight Crew Type 8700 |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Deviation - Procedural Published Material / Policy Flight Deck / Cabin / Aircraft Event Other / Unknown Ground Event / Encounter Other / Unknown |
Narrative:
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.
Original NASA ASRS Text
Title: Air carrier flight crew reported inadvertently deploying the Ram Air Turbine without any notification to ground personnel.
Narrative: 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.
Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.