B. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
27-44-51-000-001 Removal of the Trimmable Horizontal Stabilizer (THS) Actuator (9CE) 27-44-51-400-001 Installation of the Trimmable Horizontal Stabilizer (THS) Actuator (9CE) 29-00-00-864-001 Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action 27-44-51-991-010 Fig. 604
3. Job Set-up
__________
Subtask 27-44-51-860-054
A. Aircraft Maintenance Configuration
(1)
Make sure that the Green hydraulic system is depressurized and put it in the maintenance configuration. (Ref. TASK 29-00-00-864-001).
(2)
Make sure that the Yellow hydraulic system is depressurized and put it in the maintenance configuration. (Ref. TASK 29-00-00-864-001).
(3)
Put the warning notices in the cockpit to tell persons not to operate the pitch controls.
(4)
Put the warning notices in position to tell persons not to pressurize the Green and Yellow hydraulic systems:
-in the cockpit on the hydraulic section 40VU on the overhead panel,
- on the ground service panels of the Green and Yellow hydraulic systems.
Subtask 27-44-51-010-056
B. Get Access
(1)
Open the access door 312AR.
(2)
Put the access platform in position.
4. Procedure
_________
(Ref. Fig. 604/TASK 27-44-51-991-010)
Subtask 27-44-51-280-050
A. Do an integrity check of the ball screw shaft (primary and secondary load
paths). R
R (1) Put the larger clamp of the CHECKING TOOL - BALL SCREW AND TIE BAR (0U191191) in position on the lower claw stop with the graded scale upwards.
R (2) Tighten the clamping nut.
Ball Screw Shaft - Integrity Check
Figure 604/TASK 27-44-51-991-010
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R (3) Put the smaller clamp of the CHECKING TOOL - BALL SCREW AND TIE BAR in position on the tie bar nut.
R (4) Put the needle in the zero position of the graded scale and tighten the clamping nut.
R (5) Put a standard wrench on the hexagonal end of the tie bar (secondary load path).
R (6) Put a standard wrench on the machined area of the lower claw stop (primary load path).
R (7) Hold the upper wrench in position and apply a torque of 10 m.daN (73.7463 lbf.ft) at the lower wrench in the clockwise direction.
R (8) Look at the graded scale of the CHECKING TOOL - BALL SCREW AND TIE BAR.
R (9) Make sure that the rotation is not more than 10 degrees.
R (10) Do the check procedure above in the counterclockwise direction.
NOTE : Replace the THS actuator 9CE (Ref. TASK 27-44-51-000-001) and____ (Ref. TASK 27-44-51-400-001) if the rotation is more than 10 degrees.
R (11) Release the torque and remove the wrenches.
R (12) Remove the CHECKING TOOL - BALL SCREW AND TIE BAR (0U191191) from the lower claw stop and the tie bar nut.
5. Close-up________
Subtask 27-44-51-410-056
A. Close Access
(1) Make sure that the work area is clean and clear of tool(s) and other items.
(2) Close the access door 312AR.
(3) Remove the warning notice(s).
(4) Remove the access platform(s).
TASK 27-44-51-220-002
Detailed Visual Inspection of the Upper and the Lower Attachments (Primary and Secondary) of the THS-Actuator
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.
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