S 866-052

 (13)
 Make sure the autopilot switches on the pilots' glare shield panel, P55, are in the OFF position.

 S 866-053

 (14)
 Make sure the yaw damper switches on the P55 panel are in the INOP position.

 S 866-054

 (15)
 Put the stabilizer trim hydraulic cutout switches on the control stand panel, P10, to the CUT OUT position.

 S 866-055

 (16)
 Make sure the flight control shutoff valve switches on the right side panel, P61, are in the ON position.

 S 866-051

 (17)
 Remove the pressure from all three main hydraulic systems
 (AMM 29-11-00/201).

 F.  Left System PCA Leakage Check
 S 486-056
 (1) If you use the flowmeter technique, do these steps:
 (a) If you use an ACMP to pressurize the system, do these steps:
 1)  Install the flowmeter in the pressure line between the left system ACMP and the ACMP pressure/case drain filter module.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 29-11-00
 ú  ALL  ú
 ú ú  ú 09.101 ú BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.  Page 625Sep 28/02 

A
757
MAINTENANCE MANUAL

 WARNING: KEEP PERSONS AND EQUIPMENT AWAY FROM ALL CONTROL
_______ SURFACES WHEN YOU SUPPLY THE HYDRAULIC POWER. THE AILERONS, ELEVATORS, RUDDER, FLAPS, SLATS, SPOILERS, AND STABILIZER ARE FULLY POWERED SURFACES. INJURY TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR WHEN YOU SUPPLY THE HYDRAULIC POWER.
 2)  Put the L HYD PUMPS ELEC pump switch to the ON position.
 (b)  If you use the hydraulic service cart, do these steps: 1) Open the access panel, 434AL, for the hydraulic bay in the aft strut (AMM 06-43-00/201).
 2)  Connect the service cart pressure and return lines to the left system ground power connections with a flowmeter installed in the cart pressure line.
 WARNING: KEEP PERSONS AND EQUIPMENT AWAY FROM ALL CONTROL
_______ SURFACES WHEN YOU SUPPLY THE HYDRAULIC POWER. THE AILERONS, ELEVATORS, RUDDER, FLAPS, SLATS, SPOILERS, AND STABILIZER ARE FULLY POWERED SURFACES. INJURY TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR WHEN YOU SUPPLY THE HYDRAULIC POWER.
 3)  Operate the hydraulic service cart to pressurize the left system to 3000 psi.
 S 486-057
 (2)  If you use the multimeter technique, do these steps:
 (a)  Do these steps to install the multimeter and the clamp-on ac current probe: 1) Get access to the left system ACMP ELCU M10001 in the P32
　
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