R Subtask 27-44-51-860-061
R B. Aircraft Maintenance Configuration
R (1) Energize the aircraft electrical circuits (Ref. TASK 24-41-00-861-
R 002).
R WARNING : MAKE SURE THAT THE TRAVEL RANGES OF THE FLIGHT CONTROL_______
R SURFACES ARE CLEAR BEFORE YOU PRESSURIZE/DEPRESSURIZE A
R HYDRAULIC SYSTEM.
R (2) Pressurize the Yellow and the Green hydraulic systems (Ref. TASK 29-
R 23-00-863-001).
R (3) On the center pedestal:
R (a) Turn the pitch-trim control wheel to the nose DN stop position.
R (b) Turn the pitch-trim control wheel to the nose UP stop position.
R (c) Do the steps (3) (a) and (b) again.
R (d) Turn the pitch-trim control wheel to the 0 position.
R (4) Depressurize the Green and Yellow hydraulic systems.
R (Ref. TASK 29-23-00-864-001).
R (5) Make sure that the hydraulic systems are depressurized and put them
R in the maintenance configuration.
R (Ref. TASK 29-00-00-864-001).
R (6) De-energize the aircraft electrical circuits
R (Ref. TASK 24-41-00-862-002).
R (7) Put warning notices in position to tell persons not to pressurize the
R Green and Yellow hydraulic systems:
R - in the cockpit on the hydraulic section 40VU on the overhead panel,
R - on the ground service panels of the Green and Yellow hydraulic
R systems.
R (8) Put warning notices in the cockpit to tell persons not to operate the
R pitch controls.
R (9) Put the access platform in position at the access door 312AR.
R (10) Open the access door 312AR.
R 4. Procedure_________
R (Ref. Fig. 608/TASK 27-44-51-991-017)
R Subtask 27-44-51-610-050
R A. Drain and Refill the Trimable Horizontal Stabilizer Actuator Gearbox
R (1) Put a drainage container in position below the THS actuator (1).
R (2) Remove the oil drain plug (2) from the oil drain fitting (3).
R (3) Install the TOOL - OIL DRAINING, THS ACTUATOR (0U190364) on the oil
R drain fitting (3).
R (4) Drain the oil from the THS actuator (1) into the drainage container.
R (5) Remove the TOOL - OIL DRAINING, THS ACTUATOR.
R (6) Install the oil drain plug (2) on the oil drain fitting (3).
R (7) Remove the drainage container.
R (8) Fill the THS actuator (1) with the correct oil to the correct level
R (Ref. TASK 12-13-27-612-001).
R (9) Do a visual check of the THS actuator (1) and make sure that there
R are no leaks from:
R - The oil filler plug and adaptor,
R - the oil drain plug.
R 5. Close-up________
R Subtask 27-44-51-860-062
R A. Put the aircraft back to the serviceable condition.
R (1) Make sure that the work area is clean and clear of tool(s) and other
R items.
R (2) Close the access door 312AR.
R (3) Remove the access platform(s).
R (4) Remove the warning notice(s).
R Drainage and Refilling of the Trimable Horizontal Stabilizer Actuator Gearbox R Figure 608/TASK 27-44-51-991-017
1EFF : ALL 1 27-44-51Page 645 1 1 Feb 01/02 1 1 1CES 1
R **ON A/C 001-049, 051-099, 101-105, 151-199, 201-228, 301-302,
R TASK 27-44-51-220-003
R Inspection of the THS Actuator Lower Attachment for the Integrity of the
R Secondary Load Path and Check the Gap at the Secondary Nut Trunnion
R WARNING : PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU_______
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