78-36-00-410-040 Closing of the Thrust Reverser Doors 78-31-51-991-301 Fig. 401 78-31-51-991-303 Fig. 402
3. Job Set-up
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Subtask 78-31-51-860-050
A. Aircraft Maintenance Configuration
(1) On the center pedestal, on the ENG panel 115VU, make sure that a warning notice is in position to tell persons not to start the engine.
(2) On the overhead maintenance panel 50VU, make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off. Make sure that a warning notice is in position to tell persons not to energize the FADEC 1(2).
(3) Make sure that the access platform is in position.
Subtask 78-31-51-010-058
B. Get Access
(1) Make sure that the fan cowl doors are open (Ref. TASK 71-13-00-010-040): FOR 1000EM1 437AL, 438AR FOR 1000EM2 447AL, 448AR
(2) Make sure that the right thrust reverser cowl door is open (Ref. TASK 78-36-00-010-040): FOR 1000EM1 452AR FOR 1000EM2 462AR
Subtask 78-31-51-040-054
C. Make sure that the thrust reverser is unserviceable (Ref. TASK 78-30-00-481-041).
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4. Procedure
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(Ref. Fig. 401/TASK 78-31-51-991-301)
Subtask 78-31-51-420-051
A. Installation of the Hydraulic Control Unit (HCU)
NOTE : You should apply a witness line of finish paint EA4 blue 5991
____ (Material No. CP2245) on all nuts and connections when you have checked their torques.
(1) Remove the blanking caps from the electrical connectors.
(2) Remove the protective plugs from the HCU ports and the hydraulic lines.
(3) Make sure there is no unwanted matter inside the HCU ports and orifices.
(4) Lubricate the new preformed packings with thrust reverser hydraulic fluid (Material No. CP2212).
(5) Apply thrust reverser hydraulic fluid (Material No. CP2212) to the threads of the unions.
R (6) Put the preformed packing (125) on the union (130) and the preformed R packing (170) on the union (165).
(7) Install the union (130) in the head supply port on the left side of the HCU.
(8) Install the union (165) in the pressure port on the right side of the HCU.
(9) TORQUE both unions to between 610 and 700 lbf.in (6.89 and 7.91 m.daN).
R (10) Install the preformed packing (150) on the union (135).
(11) Install the union (135) in the return port on the left side of the HCU.
(12) TORQUE the union (135) to between 906 and 1002 lbf.in (10.23 and
11.32 m.daN).
R (13) Install the preformed packings (145) on the unions (140).
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(14) Install the union (140) in the lock-in port on the left side of the HCU.
(15) Install the other union (140) in the lock-out port on the right side of the HCU.
(16) TORQUE both unions to between 260 and 300 lbf.in (2.93 and 3.39 m.daN).
(17) Install the preformed packing (155) on the union (160).
(18) Install the union (160) in the rod supply port on the right side of the HCU.
(19) TORQUE the union (160) to between 370 and 410 lbf.in (4.18 and 4.63 m.daN).
R (20) Install the thermal blankets on the HCU if required, as follows: (Ref. Fig. 402/TASK 78-31-51-991-303)
R (a) Put the thermal blankets (175) and (180) on the HCU (20).
R R R (b) Make sure that the thermal blankets have the same shape as the HCU. There should be a clearance of 0.01 inch (2.54 mm) between the blankets and the adjacent parts.
R R (21) Attach the interface blanket (15) to the HCU with the bolts (120). TORQUE the bolts (120) to between 61 and 70 lbf.in (0.68 and 0.79 m.daN).
(22) TORQUE the bolts (120) to between 61 and 70 lbf.in (0.68 and 0.79 m.daN).
(23) Apply a layer of blindexite RT 342/2 (Material No. CP2318) to the HCU mating surface.
(24) Install the two lower bolts (115) on the HCU mounting flange.
(25) Position the HCU (20) against the forward frame and install the other two bolts (115).
(26) TORQUE the bolts (115) to between 140 and 160 lbf.in (1.58 and 1.80 m.daN).
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