Figure 402
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78-31-04
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
(4)
AMM 78-31-00/501, Thrust Reverser System
(5)
AMM 78-31-00/601, Thrust Reverser System
C.
Access
(1)
Location Zones
102/102 Control Cabin
502/602 Left Fan Cowl
503/603 Right Fan Cowl
504/604 Left Thrust Reverser
505/605 Right Thrust Reverser
(2)
Access Panels
5737L/5837R Fan Cowl Assy
5746L/5846R Fan Cowl Assy
5738L/5838R Thrust Reverser Cowl Assy
5739L/5839R Thrust Reverser Cowl Assy
D.
Install the rotary flex shaft (Fig. 401, and 402).
S 864-014-C00
(1) Do these steps to prepare for the installation of the flex shaft.
WARNING: KEEP PERSONS AND EQUIPMENT CLEAR OF THE FLIGHT CONTROL
_______ SURFACES, THE THRUST REVERERS, AND THE LANDING GEAR. THESE COMPONENTS CAN MOVE SUDDENLY WHEN YOU SUPPLY HYDRAULIC POWER. THIS CAN CAUSE INJURIES TO PERSONS AND DAMAGE TO EQUIPMENT.
(a)
Supply hydraulic power (AMM 29-15-00/201).
(b)
Make sure the left (right) THR REV CONT SYS circuit breaker on the circuit breaker panel, P-6, is open.
(c)
ON ENGINE NO. 2; Open the THR REV CONT SYS ALTN circuit breaker on the P6 panel.
(d)
Make sure that the applicable engine fire switch is pushed in.
(e)
Make sure that the reverse thrust levers are fully forward.
(f)
Do the activation procedure for the thrust reverser (AMM 78-31-00/201).
WARNING: MAKE SURE THERE IS HYDRAULIC PRESSURE IN THE STOW PART OF
_______ THE REVERSER HYDRAULIC SYSTEM. THIS WILL PREVENT A POSSIBLE HIGH PRESSURE LEAK OF HYDRAULIC FLUID AND A SLEEVE DEPLOYMENT. YOU MUST DO THE DEACTIVATION OF THE DEPLOY CONTROL CIRCUIT.
(g) Disconnect the electrical connector D3052 (engine No. 1) or D3056 (engine No. 2) from the control valve module of the thrust reverser (Fig. 402).
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////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
(h) Connect the wire bundle for the ground support equipment
(component of B78009-2/21) to the module and to the airplane
wire bundle.
NOTE: This will prevent the actuation of the deploy circuit.
____
(i)
Close the left (right) THR REV CONT SYS circuit breaker on the P6 panel.
(j)
Unlock the sync lock:
1) Move the No. 1(2) reverse thrust lever to the extend
position.
2) Move the No. 1(2) reverse thrust lever to the retract position.
NOTE: You must do the next step in less than 90
____ seconds after you move the reverse thrust lever to the retract position. If you do not, the sync lock will lock and prevent the movement of the sleeve.
CAUTION: IT IS VERY IMPORTANT THAT YOU KEEP HYDRAULIC PRESSURE ON
_______ THE STOW SIDE OF THE ACTUATORS WHILE YOU CONNECT THE FLEX SHAFT. IF YOU DO NOT DO THIS, THE AUTO RESTOW FUNCTION CAN BE LOST.
DO NOT USE AN EXTENSION BAR OR OTHER TOOLS TO MOVE THE UNLOCK HANDLE. IF YOU USE AN EXTENSION BAR OR OTHER TOOLS, DAMAGE TO THE UNLOCK HANDLE OR ACTUATOR CAN OCCUR.
(k) Move the manual unlock handle forward on the applicable upper actuator of the thrust reverser to operate the auto-restow function.
NOTE: This will keep the hydraulic pressure on the stow
____ side of the actuators during the flex shaft installation. When you apply pressure to the actuators (to move the thrust reversers to the stow position) there is no pressure in the the flex shaft tubes.
S 424-009-C00
(2) Connect the flex shaft to the actuators as follows:
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