A detention rod is installed between the lever assy and the door structure. It makes sure that the lever assy is always in the overcenter position.
The locking mechanism includes the locking shaft with the related shaft lever and the main lever and the barrel locks. The two barrel locks engage with the latch spigots to lock the Bulk door in the closed position. The latch spigots are on the door frame of the fuselage. The push-rod connects the lever assy with the main lever to transmit the movement of the door handle to the locking shaft.
To safety the Bulk door in the open position, the hook of the latch assy engages with the hook arrester. The spring unit connects the hook with the shaft lever so that the movement of the locking shaft operates the hook.
The two barrel locks engage with the latch spigots and hold the Bulk door in the closed position. The latch spigots are attached to the door frame of the fuselage. A detention rod is installed between the lever assy and the door structure. It makes sure that the lever assy is always in the overcenter position.
R **ON A/C 001-049, 051-099, 101-149, 221-221, 224-224, 228-228,
F. Balance Mechanism
R **ON A/C 001-003, 051-054,
(Ref. Fig. 003)
R **ON A/C 004-049, 055-099, 101-149, 221-221, 224-224, 228-228,
(Ref. Fig. 003A)
R 1EFF : 001-049, 051-099, 101-149, 221-221, 1 52-33-00Page 17 1224-224, 228-228, 1May 01/05 1 1 1CES 1
R **ON A/C 001-049, 051-099, 101-149, 221-221, 224-224, 228-228,
The balance mechanism includes the torsion bar, the pre-load unit and the connection rod. All components are installed in the upper section of the Bulk door.
The connection rod is attached between the forward lever of the torsion bar and the fuselage structure. The connection rod causes a tension of the torsion bar during the movement of the Bulk door in the open position.
The preload unit includes the flange bearing assy, the clamping sleeve and the clamping screw. A pivot pin connects the rear lever of the torsion bar with the clamping sleeve. The clamping screw sets the torsion bar in the preload condition.
G. Stop Assemblies
The stop assemblies include the adjustable stops and the stop fittings. The adjustable stops are attached to each beam end of the Bulk door. The stops touch the stop fittings when the fuselage is pressurized during the flight. The stop fittings are attached to the door frame of the fuselage.
R **ON A/C 001-049, 051-099, 101-149, 201-299, 301-399,
5. Operation_________
R **ON A/C 001-049, 051-099, 101-149, 221-221, 224-224, 228-228,
R **ON A/C 001-003, 051-054,
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