EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
29-11-00
ALL ú ú 04 Page 647 ú Jun 20/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757
MAINTENANCE MANUAL
S 866-176
(6) Put the YAW DAMPER L engage switch on the P5 panel to the ON
position.
S 496-177
(7) Make sure there are chocks on the wheels.
S 866-178
(8) Release the parking brake.
NOTE:____ This puts the left hydraulic system in the landing
configuration.
S 866-179
(9)
Let the left system operate for at least 1 minute to let the leakage flow become stable.
S 976-180
(10)
Measure and write the leakage flow.
NOTE: This is the left system gross neutral leakage flow.
____
S 976-181
(11)
If the system gross leakage is more than 4.5 GPM, you must do the Full Hydraulic System Internal Leakage Check and Isolation of Components with High Leakage procedure.
S 366-182
(12)
Replace the components with high leakage as necessary to decrease the left system gross leakage to less than 4.5 GPM.
S 866-183
(13)
Set the parking brake.
S 866-184
(14)
Put the flap control lever to the zero detent position to retract the flaps.
S 866-185
(15)
Put the landing gear lever to the OFF position.
S 866-186
(16)
Put the A/P ENGAGE L switch on the mode control panel on the P55 panel to the OFF position to disengage the left system autopilot.
(17)
Push the YAW DAMPER L switch on the P5 panel to the INOP position.
S 866-187
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
29-11-00
ALL ú ú 06 Page 648 ú Jun 20/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757 MAINTENANCE MANUAL
S 086-188
(18) If you use the flowmeter technique, do these steps:
(a)
If you use an ACMP to pressurize the system, do these steps: 1) Put the L HYD PUMP ELEC switch on the P5 panel to the OFF position.
2) Remove the flowmeter from the ACMP pressure line and connect the ACMP pressure line. 中國航空網 www.k6050.com 航空翻譯 www.aviation.cn 本文鏈接地址：757 AMM 飛機維護手冊 液壓 CHAPTER 29 - HYDRAULIC POWER 1(124)
