Subtask 78-36-51-040-052
C. Make sure that the thrust reverser is unserviceable (Ref. TASK 78-30-00-481-041).
4. Procedure
_________
(Ref. Fig. 401/TASK 78-36-51-991-300, 402/TASK 78-36-51-991-302, 403/TASK 78-36-51-991-303)
Subtask 78-36-51-420-050
R A. Installation of the Cowl Opening Actuator
NOTE : You should apply a witness line of finish paint EA4 blue 5991
____ (Material No. CP2245) on all nuts and connections after you have checked their torques.
(1) Apply a thin layer of molykote G rapid (Material No. CP2104) on the threads of the bolts (20).
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Cowl Opening Actuator Hydraulic Hose
Figure 403/TASK 78-36-51-991-303
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(2) Put the cowl opening actuator (50) in position at the thrust reverser hinge.
CAUTION : MAKE SURE THE WASHER ON THE ACTUATOR ROD IS ON THE BOTTOM
_______ OF THE ROD. THE WASHER MUST BE DOWN. IF THE WASHER IS NOT DOWN DAMAGE CAN OCCUR TO THE STRUCTURE.
CAUTION : INSTALL THE COWL-OPENING ACTUATOR IN RETRACTED POSITION.
_______ R NOTE : The bolt head goes forward on the left cowl opening actuator,
____ R and the bolt head goes aft on the right cowl opening actuator.
(a) Install the bolt (20), washer (15) and nut (10).
(3) TORQUE the nut (10) to between 139 and 278 lbf.in (1.57 and 3.14 m.daN).
(4) Lock the nut (10) with a new cotter pin (5) and cotter pin (5) (5).
(5) Remove the protective covers from the hydraulic hose (60) and the actuator (50).
CAUTION : YOU MUST INSTALL HYDRAULIC TUBES WITH HYDRAULIC FLUID AS
_______
LUBRICANT.
CAUTION : MAKE SURE THE BEND IN THE FLEX HOSE IS OUTBOARD AND AWAY
_______ FROM THE ENGINE. THE HOSE CAN RUB ON ENGINE PARTS. IF THE HOSE IS BENT INBOARD IT RUBS ON ENGINE PARTS AND CAN BE DAMAGED.
(a) Install the hydraulic hose (60) on the thrust reverser half door.
(b) Connect the hydraulic hose (60) to the supply pipe on the half door.
NOTE : Use a second wrench to hold the nut on the inner supply
____ pipe when you torque the nut on the hose.
(c) TORQUE the coupling nut on the hose (60) to between 130 and 150 lbf.in (1.46 and 1.69 m.daN).
(6) Install the hydraulic hose (60) on the cowl opening actuator.
(a) Loosely connect the hose (60) to the actuator (50) and tighten the hose coupling nut with your hand.
(b) Bleed the air from the hydraulic hose (60). CAUTION : DO NOT OVER-TORQUE THE COUPLING NUT ON THE HYDRAULIC
_______ HOSE. IF YOU TORQUE THE NUT TOO MUCH YOU CAN DAMAGE THE DOOR OPENING ACTUATOR.
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1 Put a drain can below the cowl opening actuator and the
_
coupling nut of the hose.
2 Connect the PUMP - ACTUATOR, FAN REVERSER (HIX4001) to the
_ thrust reverser half door connection.
3 Operate the hand pump until hydraulic fluid flows out thru the
_ coupling nut of the hose (60).
4 When no air bubbles are seen in the fluid at the coupling nut,
_
stop the pump.
5 Remove unwanted fluid with a clean cloth.
_
(c) Torque the hose nut as follows: CAUTION : DO NOT OVER-TORQUE THE COUPLING NUT ON THE HYDRAULIC
_______ HOSE. IF YOU TORQUE THE NUT TOO MUCH YOU CAN DAMAGE THE DOOR OPENING ACTUATOR.
1 After the air is bled from the hose (60), TORQUE the hose
_ coupling nut to between 130 and 150 lbf.in (1.46 and 1.69 m.daN).
(d) Remove the drain can from below the cowl opening actuator.
(7) Apply a thin layer of lubricant molykote G rapid (Material No. CP2104) on the threads of the bolt (20).
(8) Use the Hand Pump to extend the rod on the cowl opening actuator (50) to the open position.
NOTE : The bolt head goes forward on the left cowl opening actuator,
____ and the bolt head goes aft on the right cowl opening actuator.
(9) Put the actuator (50) in position at the pylon fitting and attach it with the bolt (20), washer (15) and nut (10).
(10) TORQUE the nut (10) to between 139 and 278 lbf.in (1.57 and 3.14 m.daN).
R (11) Lock the nut (10) with a new cotter pin (5) (5).
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