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 (f) Remove the clamp (10) from the harness for connector 4101KSB and remove the harness from the HCU.
 NOTE : Loosely install the screw (15) and nut (20) on the clamp
____ (25) and tighten with your hand.
 (g) Disconnect the electrical connectors 401VCA, 402VCA, 403VCA, 404VCA, 405VCA, 406VCA, 407VCA, 408VCA, 409VCA, 447VCA, and 448VCA from the forward pylon junction box. (Ref. Fig. 404/TASK 71-00-00-991-913)

 (h) Remove the coupling (5) and disconnect the upper starter duct from the pylon duct. (Ref. Fig. 404/TASK 71-00-00-991-913)

 (i) Install protective covers on the open ends of the ducts.

 (j) Install blanking plugs on the electrical connectors.

 (4) Remove these components from the left side of engine:
 (a) Disconnect the thrust reverser harness connector 4100KSA and 4100KSB from the electrical junction box.

 (b) Disconnect the suction hose (60) from the coupling half, the pressure hose (55), and the upper case drain hose (50) from the fluid disconnect panel. (Ref. Fig. 405/TASK 71-00-00-991-914)

 (c) Disconnect hose/tube (175) from the PRV interface.
 (Ref. Fig. 405/TASK 71-00-00-991-914)

 (d) Remove the bolts (35), the washers (40) that attach the fuel/return by-pass hose (45), from the fluid disconnect panel. Remove and discard the gasket (10). (Ref. Fig. 405/TASK 71-00-00-991-914)

 (e) Remove the bolts (25), the washers (30) that attach the main fuel supply hose (20) to the fluid disconnect panel. Remove and discard the gasket (15). (Ref. Fig. 405/TASK 71-00-00-991-914)

 (f) Install the protective covers on the disconnected hoses and tubes.

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R  Power Plant - Right Side 
R  Figure 404A/TASK 71-00-00-991-913-A
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R  Power Plant - Left Side Figure 405/TASK 71-00-00-991-914
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 (g) Disconnection of the tubes:

 CAUTION : USE 2 WRENCHES TO REMOVE OR INSTALL THE TUBE COUPLING
_______ NUTS. ONE WRENCH TO HOLD THE UNION AND ONE TO LOOSEN OR TIGHTEN THE COUPLING NUT. THIS WILL PREVENT DAMAGE TO THE HARDWARE.
 1 Disconnect the sense tubes (75) and (80) from the pylon
_
 interface tubes.

 **ON A/C 001-049, 051-099, 101-149, 201-299, 301-399,
 (Ref. Fig. 406/TASK 71-00-00-991-915)
R **ON A/C 151-152, 154-199, 401-499,
 (Ref. Fig. 406A/TASK 71-00-00-991-915-A)
R **ON A/C 001-049, 051-099, 101-149, 151-152, 154-199, 201-299, 301-399, R 401-499,
 2 Disconnect the pressure tube (70) from the union installed in
_ the upper high-pressure manifold duct (engine 1 only).
 **ON A/C 001-049, 051-099, 101-149, 201-299, 301-399,
 (Ref. Fig. 406/TASK 71-00-00-991-915)
R **ON A/C 151-152, 154-199, 401-499,
 (Ref. Fig. 406A/TASK 71-00-00-991-915-A)
R **ON A/C 001-049, 051-099, 101-149, 151-152, 154-199, 201-299, 301-399, R 401-499,
 3 Remove the coupling (65) and disconnect the pylon interface
_
 duct from the pylon duct.

 **ON A/C 001-049, 051-099, 101-149, 201-299, 301-399,
 (Ref. Fig. 406/TASK 71-00-00-991-915)
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 Pneumatic System
 Figure 406/TASK 71-00-00-991-915

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 Pneumatic System
 Figure 406A/TASK 71-00-00-991-915-A

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