(3) On the overhead maintenance panel 50VU:

 (a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.

 (b) Put a warning notice to tell persons not to energize the FADEC 1(2).

 Subtask 78-37-51-010-050
 B. Get Access
 (1) Open the fan cowl doors (Ref. TASK 71-13-00-010-040): FOR 1000EM1 437AL, 438AR FOR 1000EM2 447AL, 448AR

 (2) Put the access platform in position in the left side of engine.

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 C. Open, safety and tag this(these) circuit breaker(s):
 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------121VU ENG2/REV/LOCK 1EG2 N45 121VU ENG1/REV/LOCK 1EG1 N44
 Subtask 78-37-51-614-050
 D. Depressurization of the hydraulic reservoirs
 (1) For engine 1 depressurize the green hydraulic reservoir (Ref. TASK 29-14-00-614-001).

 (2) For engine 2 depressurize the yellow hydraulic reservoir (Ref. TASK 29-14-00-614-001).

 4. Procedure
_________ Subtask 78-37-51-020-050
 A. Removal of the Thrust Reverser Hydraulic Isolation Valve
 (Ref. Fig. 401/TASK 78-37-51-991-300)

 (1) Disconnect the electrical connector (40) from the thrust reverser isolation valve (45).
 NOTE : If necessary, use the softnose pliers to loosen the electrical
____
 connector.

 (2) Put blanking caps on the electrical connector of the harness and on the isolation valve.

 (3) Remove the filter bowl (150).

 (4) Remove the bolt (130) and the washer (135) that attach the clamp (140).

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 Thrust Reverser Hydraulic Isolation Valve
 Figure 401/TASK 78-37-51-991-300
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 (5) Disconnect the hydraulic tubes.

 (a) Put a container 2 liters below the tubes.

 (b) Disconnect the pressure supply tube (70), control tube (115) and return tube (120). Let the hydraulic fluid drain into the container.

 (c) Disconnect and remove the pressure supply tube (125) between the filter and the isolation valve (45).

 (d) Remove the container and put a protective cloth below the isolation valve.

 (e) Put blanking plugs on the disconnected line ends.

 (6) Remove the bolts (20) and (50) and washers (15) that attach the support plate (5) (where the isolation valve and its filter are installed) below the pylon.

 (7) Remove the support plate assembly (5) from the pylon.

 (8) Put blanking plugs on the disconnected line ends.

 (9) Cut and remove the lockwire which safeties the bolts (35).

 (10) Loosen and remove the four bolts (35), washers (30) and spacers (25),

 (26) and (27) that attach the isolation valve (45) and the thermal isolation (155) on the support plate (5).

 (11) Remove the isolation valve (45) and the thermal isolation (155) from the support plate (5).

 (12) Put blanking plugs on the open ports of the isolation valve and of the filter.

 (13) Remove the protective cloth from the engine.

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 TASK 78-37-51-400-001

 Installation of the Thrust Reverser Hydraulic Isolation Valve
 WARNING : WEAR A FACE SHIELD WHICH IS RESISTANT TO HIGH PRESSURE JETS WHEN YOU
_______
 WORK ON PRESSURIZED SYSTEMS.

R WARNING : DO NOT GET THE FLUID ON YOUR SKIN OR IN YOUR EYES. IF YOU DO:
_______ R - FLUSH IT AWAY WITH CLEAN WATER R - GET MEDICAL AID.
 CAUTION : MAKE SURE THERE IS NO UNWANTED MATERIAL IN THE PORTS AND ORIFICES OR
_______
 DAMAGE CAN OCCUR.

 CAUTION : YOU MUST INSTALL HYDRAULIC TUBES WITH HYDRAULIC FLUID AS LUBRICANT.
_______
 1. Reason for the Job
__________________
 Self Explanatory
 2. Job Set-up Information
______________________
　
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