Which describes the proper method to manually open an O2 compartment on the 787?

Which describes the proper method to manually open an O2 compartment on the 787?

• A. Push On Circular End Of Latch Button, Grasp Firmly And Pull Straight Down; Using Both Hands, Keep Latch Button Fully Extended, And Rotate 180 Degrees Counterclockwise To Release The Hatch
• B. Pull Upward While Turning Clockwise
• C. Break The Seal With A Tool And Pry The Hatch Open
• D. Push Latch Inward And Twist 90 Degrees Clockwise

Answer: (A)

Opening the O2 compartment is designed as a deliberate two-step action to prevent accidental release. You first push the circular end of the latch button and pull straight down to extend the latch. Then, with both hands, keep the latch button fully extended and rotate the hatch 180 degrees counterclockwise to release it. This sequence matches the actual latch mechanism, ensuring the hatch only opens when you perform the specific motions, which is important for safety and controlled access to the oxygen system. Other methods described don’t disengage the latch properly or involve tools and improper motions, which would not only fail to open the hatch but could damage the system or create safety risks.

Opening the O2 compartment is designed as a deliberate two-step action to prevent accidental release. You first push the circular end of the latch button and pull straight down to extend the latch. Then, with both hands, keep the latch button fully extended and rotate the hatch 180 degrees counterclockwise to release it. This sequence matches the actual latch mechanism, ensuring the hatch only opens when you perform the specific motions, which is important for safety and controlled access to the oxygen system. Other methods described don’t disengage the latch properly or involve tools and improper motions, which would not only fail to open the hatch but could damage the system or create safety risks.