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757 MAINTENANCE MANUAL
3) Close the access panel, 444AL, for the hydraulic bay in the aft strut (AMM 06-43-00/201).
(b) If you use the multimeter technique, do these steps: 1) Put the R HYD PUMPS ELEC pump switch to the OFF position.
WARNING: BE CAREFUL WHEN YOU REMOVE THE CLAMP-ON AC CURRENT
_______ PROBE FROM THE POWER PANEL. THE VOLTAGES IN THE POWER PANEL CAN KILL AND/OR CAUSE DAMAGE TO EQUIPMENT.
2) Remove the clamp-on ac current probe from the wire at the ACMP ELCU in the P31 panel.
I. Put the Airplane Back to Its Usual Condition
S 096-376
WARNING:_______USE THE PROCEDURE AMM 32-00-15 TO REMOVE THE DOOR LOCKS. THE DOORS OPEN AND CLOSE QUICKLY AND CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(1)
Remove the door locks from the landing gear doors and close the doors (AMM 32-00-15/201).
S 866-139
(2)
Remove electrical power if it is not necessary (AMM 24-22-00/201).
TASK 29-11-00-796-140
9. Hydraulic System Gross Internal Leakage Check_____________________________________________
A. General
(1)
This procedure does a gross internal leakage check for each hydraulic system. The total system leakage rate for each hydraulic system must not be more than the approved leakage flow rates. For the left or right system, the total null (neutral) leakage must not be more than 4.5 GPM. For the center system the total null (neutral) leakage must not be more than 4.0 GPM.
(2)
There are two techniques to measure flow rates; the multimeter technique and the flowmeter technique.
(a) Multimeter Technique
1) The multimeter technique uses the ACMPs to measure the hydraulic flow rate.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
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