Section 7 - Airframe and System s descrip - 14 - Doors Flashcards
How many doors are there? What’s their location?
Cabin main door: located forward, on the left side of the fuselage
Emergency exit (passenger door): located aft, on the right side of the fuselage
Ditching emergency exit: on the top of the cabin
How’s the operation of the main door?
As it is located close to the propeller disc, its operation is limited to the engine shut down condition
What mechanism is there to prevent crew injuries?
An electro-mechanical device that locks the door latch when the left engine runs. A pressure switch senses engine oil pressure and allows for electrical supply to a solenoid which engages the door lock mechanism
This prevents the latch opening when left engine runs, but, if needed, the device can also be manually by-passed operating either from the door inside panel or from outside.
Where are the instructions reported?
Near the by-pass lever, located in correspondence of the latch: to unlock it it is necessary to push and hold the red tab down, after that the door can be opened operating the handle
What do you need to note after engine shut-down?
The pressure drop can have a certain delay, preventing the door from being opened by normal means: do not force the handle but operate the override system above mentioned
How does the lock also become disengaged?
After a complete loss of the electric power
How do the switches engage respectively?
When the door and the latch are closed. Should one or both switches be released, the MAIN DOOR OPEN warning light is turned ON
What’s the emergency exit fitted with?
Same safety device: in this case the pressure switch allowing for solenoid operation is activated from the right engine oil pressure line; should the door be “open” or “closed and unlocked”, the REAR DOOR OPEN warning light is turned ON
What happens when there is a voluntary operation of the manual by-pass solenoid lock?
It causes related door warning light to turn on
How is the ditching emergency exit operated?
Manually, turning the handle and pushing the door outward
What’s the yellow fluorescent painted handle?
It can be operated from outside, it is fitted with a safety wire assuring removal effortlessness. When the door is open, it stays connected to the fuselage by means of two cables which allow for door opening forward
