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REFERENCE  DESIGNATION
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R R R R R R  27-50-00-866-008 27-50-00-866-009 27-51-00-710-001 27-60-00-866-002 29-00-00-864-001 29-00-00-910-002 29-10-00-863-002 29-10-00-864-002 29-23-00-860-001 29-23-00-860-002 57-51-37-000-004 57-51-37-400-004 29-13-48-991-001  Extension of the Flaps on the GroundRetraction of the Flaps on the GroundOperational Test of the Wing Tip Brake and the Pressure Off BrakeExtension-Retraction of the Spoilers for MaintenancePut the Related Hydraulic System in the Depressurized Configuration before Maintenance ActionSafety Procedures of the Hydraulic SystemPressurize the Yellow Hydraulic SystemDepressurize the Yellow Hydraulic SystemDisconnection of the Isolation Coupling of the Power Transfer Unit (PTU)Connection of the Isolation Coupling of the Power Transfer Unit (PTU) Removal of the Access Panels 575AB/575BB/575CB/575DB/575EB/575FB/575GB/575HB (675AB/675BB/675CB/675DB/675EB/675FB/675GB/675HB) Installation of the Access Panels 575AB/575BB/575CB/575DB/575EB/575FB/575GB/ 575HB (675AB/675BB/675CB/675DB/675EB/675FB/675GB/675HB)Fig. 401
 3. Job Set-up__________
 Subtask 29-13-48-941-058
 A. Safety Precautions
 WARNING : OBEY THE HYDRAULIC SAFETY PROCEDURES._______
 (1) Obey the hydraulic safety precautions (Ref. TASK 29-00-00-910-002).
 (2) Make sure that the safety barriers are in position.
 (3) Put a warning notice in position to tell persons not to pressurize the Yellow hydraulic system.

 

 Subtask 29-13-48-860-051
 B. Aircraft Maintenance Configuration 
R R  (1) Make sure that the isolation coupling of the PTU is disconnected (Ref. TASK 29-23-00-860-001).
 (2) Make sure that the Yellow hydraulic system is depressurized (Ref. TASK 29-00-00-864-001).
 (3) Make sure that the flaps are fully extended (Ref. TASK 27-50-00-866-008).
 (4) Make sure that the LOCKING TOOL - FLAP/SLAT CONTROL LEVER (98D27803000000) is on the flap/slat control lever on panel 114VU.
 (5) Make sure that the access platform is in position. 
R R  (6) Make sure that the access panel 575DB is removed (Ref. TASK 57-51-37-000-004).
 Subtask 29-13-48-865-051
 C. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged
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PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------
49VU FLIGHT CONTROLS/SEC1/NORM/SPLY 49VU FLIGHT CONTROLS/FLP/CTL AND MONG/SYS1 105VU FLT CTL/SEC1/STBY SPLY 121VU FLIGHT CONTROLS/WTB/FLP/SYS2 121VU HYDRAULIC/Y HYD/PUMP ENG2/MONG 121VU HYDRAULIC/Y HYD/PUMP ENG2/CTL 121VU FLIGHT CONTROLS/FLP/CTL AND/MONG/SYS2 121VU FLIGHT CONTROLS/SEC3/SPLY 121VU FLIGHT CONTROLS/SEC2/SPLY 122VU FLIGHT CONTROLS/WTB/FLP/SYS1  21CE1 6CV 22CE 12CV 3700GD 3701GD 8CV 21CE3 21CE2 10CV  B08B07B01P20Q37Q36Q21Q19Q18S07

 

 4. Procedure
_________
 (Ref. Fig. 401/TASK 29-13-48-991-001)
 CAUTION : BE CAREFUL WHEN YOU DO MAINTENANCE TASKS ON THE WING TRAILING
_______
 EDGE:

 -
DO NOT CAUSE DAMAGE TO THE ELECTRICAL CABLE RACEWAYS.

 -
DO NOT CAUSE DAMAGE TO THE ELECTRICAL CABLE INSTALLATIONS.

 -MAKE SURE THAT THE ELECTRICAL CABLES ARE INSTALLED CORRECTLY. INCORRECT INSTALLATION CAN CAUSE DAMAGE.
 Subtask 29-13-48-420-051
 A. Preparation for Installation
 WARNING : USE SOLVENTS/CLEANING AGENTS, SEALANTS AND OTHER SPECIAL
_______ MATERIALS ONLY WITH A GOOD SUPPLY OF AIR. OBEY THE MANUFACTURERS INSTRUCTIONS. PUT ON PROTECTIVE CLOTHING. DO NOT GET THEM IN YOUR MOUTH. DO NOT SMOKE. DO NOT BREATHE THE GAS. THESE MATERIALS ARE POISONOUS, FLAMMABLE AND SKIN IRRITANT. GET MEDICAL HELP IF YOUR SKIN OR EYES BECOME IRRITATED.
 (1)
 Remove the blanking caps from the line ends.

 (2)
 Clean the component interfaces and the adjacent area with a MISCELLANEOUS (Material No. 19-003) made moist with CLEANING AGENTS (Material No. 11-004).

 (3)
 Make sure that the parts retained from the removed component are clean and in the correct condition.

 (4)
 Do an inspection of the component interface and/or the adjacent area.

 Subtask 29-13-48-420-050
 B. Installation of the Check Valve
 (1)
 Apply HYDRAULIC FLUIDS (Material No. 02-003) to the threads of the check valve (2) and the coupling nuts (1), (3) and (5).

 (2)
 Attach the check valve (2) to the coupling nut (1).

 (3)
　
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