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B737 captain reported the first officer inadvertently activated the wrong switch during de-icing procedures and deployed the oxygen masks.
| Attributes | |
| ACN | 1609718 |
| Time | |
| Date | 201901 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Aircraft 1 | |
| Make Model Name | B737-800 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Parked |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Oxygen System/General |
| Person 1 | |
| Function | Pilot Flying Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Multiengine |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Deviation - Procedural Published Material / Policy |
Narrative:
While configuring the aircraft for deicing in accordance with checklist; first officer was attempting to turn off broadband switch in a dark; pre-dawn cockpit; and inadvertently deployed passenger oxygen masks.turning off broadband switch is a relatively new procedure; and the switch is in close proximity to not only passenger oxygen switch; but flight recorder switch as well.paying more attention prior to activating switch; but broadband switch could be moved to a less critical area on the overhead panel. When passenger oxygen masks were accidentally deployed; all passenger masks deployed. However; none of the forward galley masks deployed; and aft galley aircraft right masks failed to deploy.in an actual depressurization event; this could have been problematic for the flight attendants in their jumpseats unable to use the masks.
Original NASA ASRS Text
Title: B737 Captain reported the First Officer inadvertently activated the wrong switch during de-icing procedures and deployed the oxygen masks.
Narrative: While configuring the aircraft for deicing in accordance with checklist; First Officer was attempting to turn off broadband switch in a dark; pre-dawn cockpit; and inadvertently deployed passenger oxygen masks.Turning off broadband switch is a relatively new procedure; and the switch is in close proximity to not only passenger oxygen switch; but flight recorder switch as well.Paying more attention prior to activating switch; but broadband switch could be moved to a less critical area on the overhead panel. When passenger oxygen masks were accidentally deployed; all passenger masks deployed. However; none of the forward galley masks deployed; and aft galley aircraft right masks failed to deploy.In an actual depressurization event; this could have been problematic for the flight attendants in their jumpseats unable to use the masks.
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.