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A
747-400
MAINTENANCE MANUAL
FWD MECHANISM LATCH
SEE A
SEE SCD-4 RIG PIN HOLE C (2 LOCATIONS) MIDSPAN LATCH CAM SEE B
PUSHROD LATCH LOWER MIDSPAN A 1. LATCH ACTUATOR SWITCH OPEN LATCHES B TUBE 3. TORQUE SECTION
PIN HOLE SCD-3 RIG A B
LOWER LATCH CAM (10 LOCATIONS) LATCH SHAFT LATCH MECHANISM LEVER SECTION15. STOP 11. CLAMP 2. TORQUE TUBE 20. ADAPTER FWD (5 LOCATIONS) PUSHROD LOWER LATCH
A
Latch Actuator Figure 401 (Sheet 1)
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747-400
MAINTENANCE MANUAL
5.
BOLT
6.
WASHER
7.
BUSHING
4. LOWER 11. BOLT LATCH 12. WASHER PUSHROD 13. WASHER
14. NUT
(2 LOCATIONS) (2 LOCATIONS)
B
Latch Actuator
Figure 401 (Sheet 2)
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747-400 MAINTENANCE MANUAL
LATCH PIN FITTING (ON BODY)
Latch Actuator
Figure 401 (Sheet 3)
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MAINTENANCE MANUAL
RIB DOOR 1. LATCH ACTUATOR
SUPPORT BRACKET 23. NUT 22. WASHER 21. MOUNTING BOLTS (4 LOCATIONS)
STOP BOLT CLOSED LATCHES
INBD A-A LATCH ACTUATOR SUPPORT 15. STOP LEVER CLOSED POSITION) (LATCHES IN THE
112 TURNS OF LATCH ACTUATOR MANUAL DRIVE TUBE LATCH TORQUE STOP FITTING EXTERNAL
(UNDER NUT) 19. NUT 18. WASHER 17. WASHER 16. BOLT (2 LOCATIONS) (UNDER BOLT)
LATCHES OPEN STOP BOLT LOCKWIRE JAMNUT STOP LEVER (LATCHES IN THE OPEN POSITION)
B-B
Figure 401 (Sheet 4) Latch Actuator
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MAINTENANCE MANUAL
S 034-005
(4)
Disconnect the lower latch pushrod (4) from the crank lug on the torque tube sections (Fig. 401).
S 034-006
(5)
Remove the bolts from the clamp (10) which attaches the torque tube section (2) to the torque tube section (3).
S 424-031
(6)
Put the clamp (10) back on the torque tube sections (2).
S 024-030
(7)
Remove the torque tube section (2).
S 024-007
(8)
Remove the bolts from the stop lever (15) which attaches the torque tube section (2) to the adapter (20).
S 424-032
(9)
Put the stop lever (15) back on the adapter (20).
S 024-008
(10)
Remove the adapter (20) from the actuator (1).
S 024-009
(11)
Remove the bolts (21) that hold the latch actuator (1) to the support bracket.
NOTE: Make sure you do not move the shims.
____
S 024-033
(12) Remove the actuator (1).
TASK 52-32-09-404-010
3. Latch Actuator - Installation
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