S 434-042
(11)
Install lockwire on the drain valve for the left reservoir.
S 614-043
(12)
Fill the left hydraulic reservoir (AMM 12-12-01/301).
S 864-044
(13)
Make sure the hydraulic quantity display on EICAS maintenance shows between 0.75 and 1.00 for the left and right hydraulic reservoirs.
S 864-045
(14)
Pressurize the left and right hydraulic reservoirs to 25-50 psig (AMM 29-11-00/201).
S 864-046
CAUTION: DO NOT OPERATE THE ACMP FOR MORE THAN 2 MINUTES UNLESS BOTH
_______ NO. 1 AND NO. 2 FUEL TANKS EACH CONTAIN AT LEAST 600 GALLONS OF FUEL. IF YOU OPERATE THE PUMP 2 MINUTES WITHOUT SUFFICIENT FUEL, TURN OFF THE PUMP AND LET THE RESERVOIR TEMPERATURE DECREASE TO AMBIENT TEMPERATURE. THE ACMP WILL BE DAMAGED IF YOU OPERATE IT WHEN IT IS HOT.
(15)
Set the L ELEC PUMP switch, on the overhead panel, P5, to ON.
S 864-047
(16)
Set the R ELEC PUMP switch on the overhead panel, P5, to ON.
S 864-048
(17)
Make sure the left and right hydraulic system pressures on EICAS maintenance are between 2850 and 3150 psi when there is no flow.
S 864-049
(18)
Make sure the EICAS message POWER XFER UNIT does not show on the status or maintenance display.
S 724-050
WARNING:_______WEAR EAR PROTECTION WHEN THE PTU OPERATES. HIGH FREQUENCY NOISE CAN CAUSE DAMAGE TO THE EARS.
(19)
Set the PTU manual control switch on the right side panel, P61, to the ON position.
(20)
Make sure the PTU operates.
S 724-051
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29-22-01
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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757
MAINTENANCE MANUAL
S 724-070
(21)
Make sure there is no hydraulic leakage at the PTU fittings.
S 724-052
(22)
If the PTU stops, open then close this circuit breaker on the overhead panel, P11:
(a) 11D31, HYDRAULIC PTU CONT
S 724-053
(23)
Make sure the PTU operates for at least 1 minute.
S 864-054
(24)
Set the L ELEC PUMP switch on the overhead panel, P5, to OFF.
S 724-055
(25)
Set the PTU manual control switch on the right side panel, P61, to the OFF position.
S 724-056
(26)
When the left hydraulic system pressure on the EICAS maintenance display is less than 1000 psi, set the PTU manual control switch to the ON position.
S 724-058
(27)
Make sure the Left Hydraulic System pressure on the EICAS maintenance display shows at least 2600 psig.
S 864-072
(28)
Place the Leading Edge slats in bypass mode (AMM 27-81-00/201).
S 874-059
(29)
Extend and then retract the flaps (AMM 27-51-00/201).
S 794-069
(30)
Make sure there is no leakage at the connections for the hydraulic lines (27, 29, and 30).
S 864-061
(31)
Set the PTU manual control switch on the right side panel, P61, to the OFF position.
(32)
Make sure the PTU does not operate.
S 724-062
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