(c)
On the Nose Cargo Door Power panel H122:
1) DOOR LIFT
2) PULL UP CAM
3) LATCHES 1-4R
4) LATCHES 1-4L
5) LATCHES 5-8R
6) LATCHES 1-4L
S 864-026
(2)
Hold the control switches until the door is fully closed.
S 224-027
(3)
Make sure the door the distance between the door frame and body frame is 5.02 inches (4.97-5.07 inches).
NOTE: Make sure to keep this distance constant during the
____
installation of the push-pull cam.
S 984-037
CAUTION: DO NOT CRANK THE LATCH ACTUATOR WITH MORE THAN 8 POUND-FEET
_______ TORQUE. THIS CAN CAUSE DAMAGE TO THE MANUAL DRIVE INPUT.
(4)
Manually crank the latch actuators 5L and 5R to the fully closed positions and make sure the crank torque is not more than 20 pound-inches (approximately 150 turns from the fully open position to the fully closed position).
S 984-029
(5)
Manually crank the push-pull cam actuator until you can install the rig pin ND-4 through the cam and cam support fitting.
NOTE: The cam now is in the rig closed (or dwell) position.
____
S 424-030
(6) Install the rollers of support fittings against the cam forward face and make sure the cam web is in the center between the rollers.
NOTE: If serrations on fitting and structure are not engaged, move
____
the fitting aft a maximum of one serration.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 434-031
(7)
Install the fitting attachment bolts.
J.
Push-Pull Cam Mechanism Adjustment
S 824-032
(1)
Do an adjustment for the push-pull cam mechanism (AMM 52-31-00/501).
K.
Put the Airplane Back To Its Usual Condition
S 864-033
(1)
Make sure the door is fully closed, latched and locked.
S 484-034
(2)
Remove the electrical power, if it is not necessary.
S 494-035
(3)
Remove the safety barrier across the door opening.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
NOSE CARGO DOOR PUSH-PULL CAM MECHANISM MANUAL DRIVE - ADJUSTMENT/TEST
______________________________________________________________________
1. General
_______
A. This procedure contains these tasks:
(1) An operational test of the nose cargo door push-pull cam mechanism manual drive.
TASK 52-31-09-705-001
2. Nose Cargo Door Push-Pull Cam Mechanism Manual Drive - Functional Test
______________________________________________________________________
A. General
(1)
This is a scheduled maintenance task.
B.
Equipment
(1)
Speed Handle or Ratchet - 1/4-Inch Hex Drive Socket Manual -Operation of push-pull cam
(2)
PRE65B13015 Safety Barrier - Nose Cargo Door
C.
Access
(1)
Location Zone
801 Nose Cargo Door
D.
Prepare for Operation
S 495-002
(1)
Install the safety barrier across the door opening.
S 865-003
(2)
Open these circuit breakers and attach DO-NOT-CLOSE tags:
(a)
On the Nose Cargo Door Power Panel H122: 1) PULL UP CAM
E.
Push-Pull Cam Mechanism Manual Drive Check
S 865-016
(1)
Simultaneously hold the control switches until the latches are fully opened.
S 985-005
(2)
Manually drive the push-pull cam actuator to move the cam towards the fully open position.
