Open door, window, or panel: effects and latch checks

Aircraft stays controllable. Can open in any phase of flight.

Effects (some aircraft):

• Increased drag
• Loss of lift
• Adverse stability

Also: noise and buffeting disconcert.

Latches:

• No visible sign of being unsecured
• Usually no cockpit warning device
• Can be overlooked if pilot distracted during pre-flight checks
• Check on walk-around, not in the air

Trap: main danger is distraction, which can degrade control, not the open door.

Practice