(9)
Install the hinge covers.
S 832-033
(10)
Adjust the forward doorstop bolts for the forward door:
(a)
Remove spring wire clip and loosen the doorstop bolts.
(b)
Close and hold the door with your hand in the door flushness tolerance shown (View A-A, Fig. 202).
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A
747-400 MAINTENANCE MANUAL
(c)
Adjust length of forward door operator rod until bolt can be easily installed (don't install the bolt at this time).
(d)
Adjust the forward doorstop bolt until it touches the door with the door held in the flushness tolerance shown (View A-A, Fig. 202).
(e)
Open the door.
(f)
Turn the doorstop bolt one turn toward door.
(g)
Install the spring wire clip on the doorstop bolt.
(h)
Do these steps again for the other door.
S 342-078
(11)
Adjust the aft doorstop bolts for the forward door:
(a)
Remove the lower aft skin fairing from the left and the right side of the wheel well (Fig. 203).
(b)
Put the straightedge across the lower surface of the left and the right sidewall "tee" chords (View G-G, Fig. 202).
NOTE: This is at the aft end of the forward doors at
____ sta. 357.0. The door must be closed.
(c)
Adust the aft doorstop bolt until you get the dimension shown (View G-G, Fig. 202).
(d)
Do these steps again for the other door.
S 862-074
CAUTION: MAKE SURE THE OPERATOR RODS DO NOT HIT THE SKIN OF THE
_______ AIRPLANE. DAMAGE CAN OCCUR TO THE SKIN OF THE AIRPLANE IF THE OPERATOR RODS HIT THE SKIN.
(12)
Operate the ground release handle of the nose landing gear to extend the door actuator.
(13)
Connect the operator rods to the doors (View E, Fig. 201).
S 432-041
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747-400 MAINTENANCE MANUAL
S 862-081
(14)
Supply hydraulic pressure to the No. 1 hydraulic system (AMM 29-11-00/201).
S 862-042
(15)
Operate the ground release handle to close the nose gear doors.
S 862-043
(16)
Remove the pressure from the No. 1 hydraulic system (AMM 29-11-00/201).
S 222-044
(17)
Make sure the flushness of the forward edge of the door is in the tolerance shown (View A-A, Fig. 202).
(a)
If it is necessary, adjust operator rods as follows:
WARNING: MAKE SURE ALL PERSONS AND EQUIPMENT ARE AWAY FROM THE
_______ DOOR OPERATION AREA. A FAST MOVEMENT OF THE DOORS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
1) Move the ground release handle to the door open position
(See "Ground Door Release Handle Open Operation"). 2) Disconnect the two operator rods from the doors. 3) Move the ground release handle to the door close position
(See "Ground Door Release Handle Close Operation").
4) Manually hold the doors against forward doorstop bolts and do the steps above again to adjust the lengths of the operator rods.
S 862-048
(18)
Move the ground release handle to the door open position (See "Ground Door Release Handle Open Operation").
(19)
Install the rigging pin NG-1 in the sequence valve.
S 422-082
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