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15F  MAKE SURE THE "RUD PCU" MESSAGE IS SHOWN ON THE EICAS STATUS PAGE.  1 NOT SHOW, DO THE "PCA BOTTOMED IF THE "RUD PCU" MESSAGE DOES DIFFERENTIAL SENSOR ISOLATION TRAVEL AND PCA MONITOR TEST" AND THE "PCA PRESSURE TEST" (AMM 27-21-00/501). 
15G  AFTER 15 SECONDS WRITE WRITE THE FLOW. RUDDER PEDAL AFTER YOU THE FLOW. RELEASE THE 
15H  FIG. 109). ERASE THE EICAS "RUD PCU" MESSAGE BY DOING THIS PROCEDURE: MAINTENANCE MESSAGE ERASE PROCEDURE (FIM 31-41-00/101, 
16  15A AND 15G. WRITE THE LARGEST FLOW HERE. COMPARE THE FLOW OF STEPS  THE SYSTEM NEUTRAL LEAKAGE. RUDDER PCA SEAL LEAKAGE AND THIS IS THE RIGHT SYSTEM 
17  CALCULATE THE RIGHT SYSTEM LEFT ELEVATOR LEAKAGE.  MINUS STEP 2 STEP 5______  |1.0 GPM  THIS IS THE RIGHT SYSTEM LEFT ELEVATOR NEUTRAL MINUS SEAL LEAKAGE. IF THE RESULT IS POSITIVE, WRITE IT IN THE NEGATIVE, WRITE IT IN THE "SEAL" COLUMN. "NULL" COLUMN. IF IT IS 
18  CALCULATE THE RIGHT SYSTEM RIGHT ELEVATOR LEAKAGE.  STEP 2 MINUS STEP 9______  |1.0 GPM  RIGHT ELEVATOR NEUTRAL MINUS SEAL LEAKAGE. IF THE RESULT IS POSITIVE, WRITE IT IN THE NEGATIVE, WRITE IT IN THE "SEAL" COLUMN. "NULL" COLUMN, IF IT IS THIS IS THE RIGHT SYSTEM 
19  CALCULATE THE RIGHT SYSTEM RUDDER LEAKAGE.  STEP 2 MINUS STEP 16_______  |2.0 GPM  NEGA-TIVE, WRITE IT IN THE LEAKAGE. IF THE RESULT IS RUDDER NEUTRAL MINUS SEAL POSITIVE, WRITE IT IN THE "SEAL" COLUMN. "NULL" COLUMN, IF IT IS THIS IS THE RIGHT SYSTEM 
20  CENTER) TO "OFF". SIMULATOR (MAIN EQUIPMENT EACH YAW DAMPER MODULE DISPLACEMENT SWITCH ON PUT THE RUDDER 
21  M523 (E4-1)(FIG. 607). REMOVE THE YAW DAMPER MODULE SIMULATORS AND INSTALL THE YAW DAMPER MODULES, M522 (E3-1) AND 

MINIMUM CHECK
MAKE SURE ALL THE SYSTEMS REQUIRED TO PERFORM THIS TEST ARE FUNCTIONAL.
Internal Leakage Check for the Right Hydraulic System - Elevator and Rudder PCAs Figure 609 (Sheet 3)
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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MAINTENANCE MANUAL

 (2)  S 026-511Remove the Yaw Damper Module Simulators and put the Yaw Damper Modules into place (Fig. 607).
 (3)  S 086-246If you used the flowmeter technique with an ACMP, remove the flowmeter from the ACMP pressure line and connect the ACMP pressure line.
 S 086-480

 WARNING: BE CAREFUL WHEN YOU REMOVE THE CLAMP-ON AC CURRENT PROBE FROM
　
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