S 216-274

 (2)  
Make sure the PRESS light for the center ACMP C1 on the P5 panel is off.

 S 816-275

 (3)  
If the PRESS light for the center ACMP C1 is on, repair the pressure indication circuit for this light and again do the two steps above.

 S 216-276

 (4)  
Make sure the PRESS light for the center ACMP C2 is on.

 NOTE: If there is a leak of system pressure through the ACMP C2
____ check valve, the PRESS light will be off.
 S 366-277
 (5)  
If the PRESS light for ACMP C2 is off, replace the check valve for ACMP C2 in the center ACMP filter module (AMM 29-11-19/401).

 S 866-279

 (6)  
Push the C HYD PUMPS ELEC 1 switch to OFF and the C HYD PUMPS ELEC 2 switch to ON on the P5 panel.

 S 216-280

 (7)  
Make sure the PRESS light for the center ACMP C2 is off.

 S 816-278

 (8)  
If the PRESS light for the center ACMP C2 is on, repair the pressure indication circuit for this light and again do the two steps above.

 S 216-281

 (9)  
Make sure the PRESS light for the center ACMP C1 is on.

 NOTE: If there is a leak of system pressure through the ACMP C1
____ check valve, the PRESS light will be off.
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 29-11-00
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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757
MAINTENANCE MANUAL

 S 366-282
 (10)
 If the PRESS light for ACMP C1 is off, replace the check valve for ACMP C2 in the center ACMP filter module (AMM 29-11-19/401).

 S 866-283

 (11)
 Remove the pressure from the center hydraulic system and reservoir (AMM 29-11-00/201).

 S 036-284

 (12)
 Disconnect the pressure hose at the ACMP C1 (AMM 29-11-02/401).

 S 036-285

 (13)
 Install a cap on the ACMP C1 pressure port and put the end of the pressure hose in a container to catch the fluid.

 NOTE: This a check to make sure a pressure leak through the ACMP
____
 C1 check valve does not back-drive the ACMP.

 S 866-286
 CAUTION: USE CARE WHEN YOU DO A CHECK FOR FLUID LEAKAGE FROM THE
_______ PRESSURE HOSE. A SPRAY OF FLUID FROM THE PRESSURE HOSE CAN CAUSE INJURY TO PERSONS.
　
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