1 Remove and discard the cotter pin (41) from the nut (42).
_
 2 Remove the nut (42), the washers (43) and the bolt (45).

_
 3 Remove the eye-end (46) of the connection rod (50) from the

_
 fuselage fitting (44).

 (d) Close the Bulk door carefully (Ref. TASK 52-30-00-860-008).
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 Adjustment of the Torsion Spring
 Figure 507/TASK 52-33-11-991-006

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 Adjustment of the Torsion Spring
 Figure 507A/TASK 52-33-11-991-006-A

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 (2) Adjust the torsion spring (51) to increase the tension of the balance mechanism as follows:
 (a) Cut and remove the lockwire from the screw (56) and the clamping screw (55) of the pre-load unit.
 CAUTION : -YOU MUST NOT INCREASE THE TIGHTENING TORQUE MORE THAN
_______ THE MAXIMUM VALUE. -APPLY ALL TIGHTENING TORQUES WITH A TORQUE WRENCH OR A CALIBRATED SCREWDRIVER.
 (b) Tighten the clamping screw (55) and then loosen it two turns to set the tension of the torsion spring (51).
 NOTE : Do not overtorque the clamping screw (55). The max.
____ allowed torque value is 1.4 m.daN (10.3244 lbf.ft).
 (c) Do not safety the clamping screw (55) at this time with lockwire.
 (3) Attach the connection rod (50) on the fuselage as follows:
 (a)
 Carefully open the Bulk door (Ref. TASK 52-30-00-860-006).

 (b)
 Adjust the length of the connection rod (50) as follows:

 1_ Cut and remove the lockwire from the jam nuts (47) and the
 safety rings (48).
 2_ Loosen the jam nuts (47) to adjust the length of the
 connection rod (50).
 3_ Put the eye-end (46) on the fuselage fitting (44).
 4_ Turn the turnbuckle (49) until the holes of the eye-end (46)
 and the fuselage fitting (44) are aligned.
 NOTE : Make sure that the threaded ends of the eye-ends (46)____
 and the connection rod (50) cover the inspection holes
 of the turnbuckle (49).
 5_ Tighten the jam nuts (47) to safety the turnbuckle (49).
 NOTE : Do not safety the jam nuts (47) at this time with____
 lockwire. 

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 (c) Install the bolt (45), the washers (43) and the nut (42). NOTE : Tighten the nut (42) with your hand.
____ Subtask 52-33-11-720-051
 B. Functional Test
 (1) Do this test to make sure that the balance mechanism is satisfactory.
 -------------------------------------------------------------------------------ACTION RESULT -------------------------------------------------------------------------------
1.
 Set the door handle in the OPEN position to release the hook from the hook arrester.

2.
 Pull the Bulk door down and stop in different positions.

3.
 Measure the force necessary to close the Bulk door.

4.
 Pull the Bulk door fully down in the opening and release it.

5.
 Push the Bulk door inwards and stop in different positions.

6.
 Measure the force necessary to open the Bulk door.

The Bulk door must stay in the fullyopen position and not start to close byits own weight.
The Bulk door must stay in eachposition.
The force must be less than 5.0 daN(11.2404 lbf).
The Bulk door must stay in the fullyclosed position and not open suddenly by itself.
The Bulk door must stay in each openposition.
The force must be less than 5.0 daN(11.2404 lbf).
 (2) If the Bulk door moves by itself during this test, continue as follows:
 (a)
 Make sure that the insulation packs are not soaked with the condense water.

 (b)
 Make sure that the drain holes of the Bulk door structure are free and not blocked with unwanted objects.

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 (c) Adjust the tension of the balance mechanism again (refer to para. 4.A.(2)).
 NOTE : Make sure that the connection rod (50) is disconnected
____ during the adjustment and the clamping screw (55) must not be overtorqued.
 Subtask 52-33-11-420-058
 C. Final Installation
 (1)
 Safety the clamping screw (55) with lockwire corrosion-resistance steel, dia 0.63 mm.

 (2)
　
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