__________________
 Self Explanatory

 2. Job Set-up Information

______________________
 A. Fixtures, Tools, Test and Support Equipment
 -------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific warning notice
 No specific access platform 1.5 m (4 ft. 11 in.)

 B. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
71-13-00-010-040 Opening of the Fan Cowl Doors 72-23-00-991-316 Fig. 409
 3. Job Set-up
__________ Subtask 72-23-00-941-083
 A. Safety Precautions
 (1) On the center pedestal, on the ENG panel 115VU:

 (a) Put a warning notice to tell persons not to start the engine.

 (2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.

 (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.
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 (b) Put a warning notice to tell persons not to energize the FADEC 1(2).
 Subtask 72-23-00-010-106
 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.

 4. Procedure
_________ (Ref. Fig. 409/TASK 72-23-00-991-316) Subtask 72-23-00-020-066
 A. Removal of the PS12 Line CAUTION : USE 2 WRENCHES TO REMOVE/INSTALL THE TUBE UNION NUT: ONE TO
_______ HOLD THE FITTING, THE OTHER TO LOOSE/TORQUE THE NUT. OTHERWISE, DAMAGE TO THE HARDWARE CAN OCCUR.
 (1) Cut and remove the lockwire.

 (2) Disconnect the PS12 line from the ECU.

 (3) Cut and remove the lockwires.

 (4) Disconnect the PS12 line from the 3 fan frame bosses.

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 Removal/Installation of the PS12 Line Figure 409/TASK 72-23-00-991-316- 16 (SHEET 1)
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 (5) Remove the parts which attach the PS12 Line as follows:

 -------------------------------------------------------------------------------REMOVE FROM NOTE -------------------------------------------------------------------------------
Nut (30)  Bracket (40) on flange G  At the 5 o'clock
 Bolt (10)  position (Detail C)
 Nut (70)  Bracket (80) on flange E  At the 4:45 o'clock
 Bolt (50)  position (Detail D)
 Clamp (60)
 Nut (110)  Bracket (120) on flange C  At the 4:30 o'clock
 Bolt (90)  position (Detail E)
 Clamp (100)
 Nut (150)  Bracket (140) on flange C  At the 4 o'clock
　
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