S 862-003-N00
(2)
Make sure the forward thrust lever is in the idle position and the reverse thrust lever is fully forward.
S 862-002-N00
(a) Install the DO-NOT-OPERATE tags on the forward thrust lever and reverse thrust lever.
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747-400 MAINTENANCE MANUAL
S 042-004-N00
WARNING: DO THE DEACTIVATION PROCEDURE TO PREVENT THE OPERATION OF THE
_______ THRUST REVERSER. THE ACCIDENTAL OPERATION OF THE THRUST REVERSER CAN CAUSE INJURIES TO PERSONS AND DAMAGE TO EQUIPMENT.
(3)
Do the deactivation procedure for the thrust reverser for ground maintenance (AMM 78-31-00/201).
S 012-005-N00
(4)
Open the fan cowl panels (AMM 71-11-04/201).
S 862-006-N00
(5)
For the left engine, open this circuit breaker and attach the DO-NOT-CLOSE tag:
(a) On the overhead circuit breaker panel, P11:
1) 11D13, L ENG T/R IND
S 862-007-N00
(6) For the right engine, open these circuit breakers and attach the DO-NOT-CLOSE tags:
(a) On the P11 panel:
1) 11L32, R ENG T/R IND
2) 11D32, R ENG T/R IND ALTN
S 022-016-N00
CAUTION:_______IMMEDIATELY CLEAN ALL OF THE HYDRAULIC FLUID THAT FALLS. THE HYDRAULIC FLUID CAN CAUSE CONTAMINATION OF THE AIRPLANE OR THE ENGINE.
(7) Disconnect the two flex shafts tubes (1) and (2) from the center locking hydraulic actuator (4) (Fig. 201).
(a)
Loosen and move the tube nuts (3) back off of the fittings at the hydraulic actuator ports. 1) Catch the hydraulic fluid in an approved container.
(b)
Loosen the support block clamps that attach the tube assembly to the torque box.
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747-400
MAINTENANCE MANUAL
LOCKING HYDRAULIC
ACTUATOR (RIGHT SIDE)
SEE B
FWD
FWD
4. LOCKING HYDRAULIC ACTUATOR
LOCKING HYDRAULIC
ACTUATOR
(LEFT SIDE)
SEE A
1. UPPER FLEX
SHAFT TORQUE BOX
(REF)
3. TUBE NUT
3. TUBE NUT
2. LOWER FLEX SHAFT
LOCKING HYDRAULIC ACTUATOR (LEFT SIDE)
A
Locking Hydraulic Actuator Figure 201 (Sheet 1)
K14509
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747-400
MAINTENANCE MANUAL
1. UPPER FLEX SHAFT
TORQUE BOX (REF)
3. TUBE NUT
FWD 3. TUBE NUT 2. LOWER FLEX B LOCKING HYDRAULIC ACTUATOR (RIGHT SIDE) SHAFT DSEE 4. LOCKING ACTUATOR HYDRAULIC
Locking Hydraulic Actuator
Figure 201 (Sheet 2)
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K14540
A
747-400
MAINTENANCE MANUAL
FWD
TORQUE BOX
LOWER NON-LOCKING (REF)
HYDRAULIC ACTUATOR
SEE A
3. TUBE NUT
2. LOWER FLEXSHAFT AND TUBE
SYNC LOCK
(REF) LOWER
FWD NON-LOCKING
HYDRAULIC
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