(7)
 Cut the lockwire and remove the inspection plugs (1) with the O-ring (2).

 (8)
 Cut the lockwire and remove the plug (3) with the O-ring (4).

 Inspection of the Magnetic Detector and Boroscope Inspection of the
 THS-Actuator
 Figure 607/TASK 27-44-51-991-015

 (9) Discard the O-rings (2),(4).
 (10)
 Install the RELEASE TOOL - PRESSURE-OFF BRAKE, THS ACTUATOR (0U190844) (Ref. TASK 27-44-51-710-001).

 (11)
 Put an optical probe into the inspection holes of the gearbox and examine the teeth of the power gears.

 (12)
 Put a socket wrench in the opening of the manual drive input.

 (13)
 Use the socket wrench and turn the manual drive input.

 (14)
 Examine the teeth of the power gear while you turn the manual drive input.

 NOTE : Do the inspection thru both inspection holes.
____
 (15)
 Turn the manual drive input to the zero position.

 (16)
 If you find chipped gear teeth, replace the THS-actuator (Ref. TASK 27-44-51-000-001) and (Ref. TASK 27-44-51-400-001).

 NOTE : Do not clean the magnetic chip detectors. They may be the
____
 basis of a subsequent analysis.

 (17)
 If you have not found defects of the gear teeth, continue as follows:

 (a)
 Connect the drain plug (5).

 (b)
 Install the inspection plugs (1) with the new O-rings (2).

 (c)
 TORQUE the plug (1) to 2 m.daN (14.74 lbf.ft) and safety it with lockwire, corrosion-resistant steel, 0.6 mm (0.024 in.)

 (d)
 Install the plug (3) with the new O-ring (4).

 (e)
 TORQUE the plug (3) to between 1.4 and 1.6 m.daN (10.32 and 11.79 lbf.ft) and safety it with lockwire, corrosion-resistant steel,

 0.6 mm (0.024 in.)
 (f)
 Remove the RELEASE TOOL - PRESSURE-OFF BRAKE, THS ACTUATOR (Ref. TASK 27-44-51-710-001).

 (g)
 Fill the THS-actuator with oil (Ref. TASK 12-13-27-612-001).

 (h)
 Do the system test of the THS-mechanical control (Ref. TASK 27-41-00-730-001).

 (i)
 If the system test shows a defect, replace the THS-actuator (Ref. TASK 27-44-51-000-001) and (Ref. TASK 27-44-51-400-001). ________

5. Close-up
 Subtask 27-44-51-410-060
 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 access platform(s).

 (4)
 Remove the warning notice(s).

 TASK 27-44-51-610-001 Drain and Refill the Trimable Horizontal Stabilizer Actuator Gearbox WARNING : MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON THE LANDING
_______
 GEAR.

 WARNING : MAKE SURE THAT THE TRAVEL RANGES OF THE FLIGHT CONTROL SURFACES ARE
_______
 CLEAR BEFORE YOU PRESSURIZE/DEPRESSURIZE A HYDRAULIC SYSTEM.

 WARNING : PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU
_______
 START A TASK ON OR NEAR:

 -
THE FLIGHT CONTROLS

 -
THE FLIGHT CONTROL SURFACES

 -
THE LANDING GEAR AND THE RELATED DOORS

 -COMPONENTS THAT MOVE.
 WARNING : OBEY THE HYDRAULIC SAFETY PROCEDURES.

_______
 1. Reason for the Job
__________________ R Refer to the MPD TASK: 274451-09
 2. Job Set-up Information
______________________
 A. Fixtures, Tools, Test and Support Equipment
 -------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific warning notices
 No specific drainage container 4.0 l (1.0566 USgal)
 No specific access platform 5.5 m (18 ft. 1 in.)
 0U190364 1 TOOL - OIL DRAINING, THS ACTUATOR

R B. Referenced Information
R -------------------------------------------------------------------------------R REFERENCE DESIGNATION R -------------------------------------------------------------------------------
R 12-13-27-612-001 R 24-41-00-861-002 R R 24-41-00-862-002 R R 29-00-00-864-001 R R 29-23-00-863-001 R R R 29-23-00-864-001 R R 27-44-51-991-017
R 3. Job Set-up
__________
R Subtask 27-44-51-865-060 Oil Replenishment of the THS Actuator (9CE) Energize the Aircraft Electrical Circuits from the External Power De-energize the Aircraft Electrical Circuits Supplied from the External Power Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action Pressurize the Green Hydraulic System from the Yellow Hydraulic System through the PTU with the Electric Pump Depressurize the Green and Yellow Hydraulic Systems after Operation of the PTU Fig. 608
　
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