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About this video
There are three cargo compartment doors on the right side of the lower fuselage. They are referred to as FWD, AFT and BULK cargo-compartment doors and give access to the related cargo compartment. i will focus on FWD and AFT cargo .
The FWD and AFT cargo compartment doors have a manual locking mechanism and open hydraulically away from the aircraft. It is only possible to open or close the FWD and AFT cargo-compartment doors from the outer side.
The FWD and AFT cargo-compartment door is made of sheet metal and machined parts. It is torsion-resistant and safe to operate at wind speeds up to 50 knots. A manually operated locking mechanism is installed internally to keep the FWD and AFT cargo-compartment door in the closed position.
The electrical door control-system starts the electric pump of the Yellow hydraulic system which pressurizes the door hydraulic system. The door hydraulic system operates the duplex door actuators to open or close the cargo-compartment door. If there is an electrical failure, it is possible to operate the cargo-compartment door with the handpump.
The pressurization of the door hydraulic system does not occur when the locking mechanism is in the locked
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