-
the vent door lever operates the connection rod which turns the drive shaft of the gear box. The output shaft of the gear box also turns and moves the drawbar which opens the vent door. The drive shaft operates the link assy at the same time so that the target lever moves away from the door sill. The related target does not operate the proximity switch 30WV (Ref. 52-71-00).

 1EFF : ALL 1 52-31-00Page 37 1 1 Aug 01/05 1 1 1CES 1

 Function of Latching and Locking Mechanism Figure 007 (SHEET 1)
 1EFF : 001-049, 053-099, 101-105, 151-199, 1 52-31-00Page 38 1201-220, 1May 01/05 1 1 1CES 1

 Function of Latching and Locking Mechanism Figure 007 (SHEET 2)
 1EFF : 001-049, 053-099, 101-105, 151-199, 1 52-31-00Page 39 1201-220, 1May 01/05 1 1 1CES 1

R  Function of Locking Mechanism 
R  Figure 007A
 1EFF :  051-052,  1  52-31-00 Page 40 
1  1  May 01/05
 1  1
 1CES  1

 INTENTIONALLY BLANK

 1 1
52-31-00Page 41
1 1 May 01/05 1 1 1CES 1

 Function of Latching and Locking Mechanism
 Figure 007B (SHEET 1)

R 1EFF : 106-149, 221-299, 301-399, 401-499, 1 52-31-00Page 42 1 1 Aug 01/05 1 1 1CES 1

 Function of Latching and Locking Mechanism
 Figure 007B (SHEET 2)

R 1EFF : 106-149, 221-299, 301-399, 401-499, 1 52-31-00Page 43 1 1 Aug 01/05 1 1 1CES 1

 Function of Interlock Mechanism
 Figure 008
 1EFF :  ALL  1  52-31-00 Page 44 
1  1  May 01/05
 1  1
 1CES  1

 **ON A/C 051-052,

 A. Release Mode
 To release the cargo door mechanism, pull the locking handle away from the cargo door. To get access to the locking handle, the operator pushes the handle flap automatically inboard. This operation releases the hook of the flap mechanism and the locking handle is movable.
 When the locking handle is pulled until the limit lever stops this movement, the subsequent occurs:
 -
the lever mechanism operates the link rod which moves the link lever. The safety shaft turns so that the safety cams move away from the recess of the locking hooks. Then the red mark on each safety cam comes in view through the indication windows.

 -
the drift pin levers move up and operate the teleflex controls. The ends of these controls extend and move the bellcranks which operate the connection links. The drift pins retract from the pockets of the fuselage frames,

 -
the vent door lever operates the connection rod which turns the drive shaft of the gear box. The output shaft of the gear box turns also and moves the drawbar which opens the vent door. The drive shaft operates the link assy at the same time so that the target lever moves away from the door sill. The related target does not operate the proximity switch 30WV (Ref. 52-71-00).

R **ON A/C 106-149, 221-299, 301-399, 401-499,
 A. Release Mode
 To release the cargo door mechanism, pull the door handle away from the cargo door. To get access to the door handle, the operator pushes the spring-loaded handle flap automatically inboard. This releases the door handle from the catch hook of the door structure.
 When the door handle is pulled up to the 65 degree position, the subsequent occurs:
 -
the door handle engages with the maltese-cross lock to operate the linkage mechanism. Its control rod then turns the locking shaft so that the lock cams move away from the recess of the latching hooks.

 -
the drift pin lever moves up and operates the linkage mechanism. The control rods transmit the movement through the housing assy and the bearing assy to the connection rods. They move the drift pins which retract from the pockets of the fuselage frames, at the same time the vent door mechanism causes the vent door to open.

R 1EFF : 051-052, 106-149, 221-299, 301-399, 1 52-31-00Page 45 1401-499, 1Aug 01/05 1 1 1CES 1

 -The drive shaft operates the link assy at the same time so that the target lever moves away from the door sill. The related target does not operate the proximity switch 32WV (Ref. 52-71-00).
R **ON A/C 001-049, 053-099, 101-149, 151-199, 201-299, 301-399, 401-499,
 To disengage the latching hooks from their fuselage fittings, lift the door handle up to the 128 degree position. During this movement, the subsequent occurs:
 -
the door handle disengages from the Maltese-cross lock and engages with the Maltese-cross latch. This causes the latching shaft to turn in the release direction.

 -
the shaft levers operate the bellcranks which move the bellcrank levers so that the latching hooks disengage from the eccentric bolts of the fuselage fittings,
　
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