757 MAINTENANCE MANUAL
G. Do a Test of the Alternating Current Motor Pumps (ACMPs) in the Center Hydraulic System With the Engines Not in Operation
S 865-193
(1) Open these circuit breakers on the P11 panel and attach DO-NOT-CLOSE tags:
(a)
11K16, ELEC PUMP R
(b)
11K24, ELEC PUMP C2
(c)
11K25, ELEC PUMP LEFT
S 865-194
(2)
Put the C HYD PUMPS ELEC 1 switch, on the hydraulic control panel, in the ON position.
S 215-195
(3)
Make sure the ACMP C1 in the center hydraulic system, in the aft left wing-to-body fairing, starts after 2 seconds.
S 215-196
(4)
Make sure the PRESS light for the ACMP C1, on the hydraulic control panel, goes off in less than 2 seconds after the ACMP starts.
S 215-197
(5)
Make sure the SYS PRESS light for the center hydraulic system, on the hydraulic control panel, is not on.
S 215-198
(6)
Make sure these EICAS messages do not show on the EICAS display:
(a)
C HYD SYS PRESS
(b)
C HYD ELEC 1.
S 215-199
(7)
Make sure the EICAS message, C HYD ELEC 2, shows on the EICAS display.
S 215-200
(8)
Make sure the C HYD PRESS indication, on the EICAS display, is 2850 to 3150 psi.
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757
MAINTENANCE MANUAL
S 865-201
(9)
Put the C HYD PUMPS ELEC 1 switch, on the hydraulic control panel, in the OFF position.
S 215-202
(10)
Make sure the ACMP C1 in the center hydraulic system, in the aft left wing-to-body fairing, stops in less than 1 second.
S 215-203
(11)
Make sure the EICAS message, C HYD SYS PRESS, shows on the EICAS display.
S 215-204
(12)
Make sure these EICAS messages do not show on the EICAS display:
(a)
C HYD ELEC 1
(b)
C HYD ELEC 2.
S 215-205
(13)
Make sure the C HYD PRESS indication, on the EICAS display, is 0 to 200 psi.
S 215-206
(14)
Make sure these lights on the hydraulic control panel are on:
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