K23055
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52-34-21
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A
747-400
MAINTENANCE MANUAL
DIAMETER OF THE CAM LATCH FROM THE
LATCH IN CLOSED POSITION
INBOARD EDGE OF THE CAM MOUTH TO
(EXAMPLE, 8 LOCATIONS)
THE INBOARD EDGE OF THE STRIPE.
A-A
Latch Alignment Stripes and Arrows Installation Figure 201 (Sheet 2)
K23210
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747-400
MAINTENANCE MANUAL
VIEW PORT WINDOW
2
OF THE VIEW PORT WINDOW BEFORE
INSTALLATION. B-B
Latch Alignment Stripes and Arrows Installation Figure 201 (Sheet 3)
K23215
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747-400 MAINTENANCE MANUAL
(c) Manually push and hold the plunger of the door closed switch and the door control switch in the closed position.
NOTE: The latch cams will turn electrically to the full closed
____
position.
S 862-004
(3)
Open these circuit breakers for the applicable cargo door and attach DO-NOT-CLOSE tags:
(a)
P59 Aft Equipment Panel
1) AFT CARGO DOOR POWER UNITS
(b)
P414 Power Distribution Center - Left 1) 414A21 LOWER CARGO DOOR FWD 2) 414F15 CARGO DOOR CONTROL FWD 3) 414F16 CARGO DOOR CONTROL AFT
S 022-003
(4)
Remove the latch alignment stripes and arrows as follows (Fig. 201):
(a)
Remove the latch alignment stripes from the latch cam (Ref 20-11-08/401).
(b)
Remove the latch alignment arrow from the latch pin fitting.
TASK 52-34-21-402-005
3. Latch Alignment Stripes and Arrows - Installation
_________________________________________________
A. Consumable Materials
(1)
B00148 Solvent - Ethyl Alcohol
(2)
G00000 Reflective sheeting/adhesive back tape -Scotchlite Flat Top
B.
References
(1)
52-34-00/001, Forward/Aft Cargo Door
(2)
IPC 11-12-51 Fig. 2, 11-12-56 Fig. 2
C.
Access
(1)
Location Zone 122 Forward Cargo Container Compartment, Forward Half 142 Aft Cargo Container Compartment
(2)
Access Panels
821R Door - Forward Cargo Compartment
822R Door - Aft Cargo Compartment
D.
Procedure
(1)
Make sure the cargo door is open and in the vertical position.
S 862-033
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747-400 MAINTENANCE MANUAL
S 862-042
(2)
If the latch cams are not in the closed position, turn the latch cams to the closed position as follows:
(a)
Manually turn the hooks to the hook closed position approximately 15 turns or until the hook position switch starts.
(b)
Hold the door control switch in the closed position approximately 3 seconds until the hooks turn to the full closed position.
(c)
Manually push and hold the plunger of the door closed switch and the door control switch in the closed position.
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