On the center pedestal:
-
the pitch trim-control wheel moves to the aircraft nose DN direction (the THS leading edge moves up).
On the THS actuator (4):
-
the jamming protection device is operated and the THS actuator (4) stops immediately.
-all remaining pressure in the valve blocks of the THS actuator is released.
On the RH threshold-box assy
(Ref. Fig. 503/TASK 27-44-00-991-004)
-the control-valve detent of the "JAMMED" control-valve becomes recentered (which was possibly opened by the back order on the pitch trim-control wheel) when you hear a "CLICK".
-------------------------------------------------------------------------------ACTION RESULT -------------------------------------------------------------------------------
-at the same time the reference marks
R
R
R 9. On the RH control-valve block (3)
R of the THS actuator (4):
R - remove the TOOL - JAMMING
R SIMULATION from the splined end
R of the control-valve shaft.
Subtask 27-44-00-860-052
on the input plate and the ball carrier of the control-valve detent must be in line.
E. Put the system back to the serviceable condition. WARNING : MAKE SURE THAT THE CONTROL VALVE DETENTS ARE CENTERED. IF THE
_______
DETENTS ARE NOT CENTERED THE AIRCRAFT WILL NOT OPERATE
CORRECTLY.
(1)
On the left and right threshold box assy:
(Ref. Fig. 503/TASK 27-44-00-991-004)
(a) Make sure that you cannot put a feeler gage with a thickness of
1.2 mm (0.0472 in.) into the gap between the input plate and the ball carrier of the control valve detent.
(b) If the feeler gage goes in the gap, you must recenter the control valve detent as specified in para. Job Set-Up, step C.
(2)
On the panel 23VU:
(a)
Push the FLT CTL/ELAC 1 pushbutton switch, (the OFF legend on this pushbutton switch goes off).
(b)
Push the FLT CTL/SEC 1 pushbutton switch, (the OFF legend on this pushbutton switch goes off).
(3)
On the panel 24VU:
(a)
Push the FLT CTL/ELAC 2 pushbutton switch, (the OFF legend on this pushbutton switch goes off).
(b)
Push the FLT CTL/SEC 2 pushbutton switch, (the OFF legend on this pushbutton switch goes off).
Subtask 27-44-00-410-053
F. Installation of the Caps
(1)
On the left and right hydraulic valve blocks of the THS actuator (4): (Ref. Fig. 502/TASK 27-44-00-991-003)
(2)
Install the caps (6) on the valve control shafts (7).
(3)
Safety the caps (6) with lockwire, corrosion-resistant steel, dia.
0.6 mm (0.024 in.).
(4)
Safety the threaded bushes (5) with lockwire, corrosion-resistant steel, dia. 0.6 mm (0.024 in.).
Subtask 27-44-00-710-055
G. Do an operational test of the THS actuator:
-with both hydraulic systems
and
-individual hydraulic system (Ref. TASK 27-44-00-710-003).
5. Close-up
________ Subtask 27-44-00-860-051
A. Put the aircraft back to the serviceable condition.
(1)
Make sure that the Green and Yellow hydraulic systems are depressurized. (Ref. TASK 29-23-00-864-001).
(2)
Do the EIS stop procedure
(Ref. TASK 31-60-00-860-002).
(3)
De-energize the aircraft electrical circuits (Ref. TASK 24-41-00-862-002).
Subtask 27-44-00-410-050
B. 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).
1EFF : ALL 1 27-44-00Page 521 1 1 May 01/05R 1 1 1CES 1
TASK 27-44-00-710-002
Operational Test of the Trimmable Horizontal Stabilizer Actuator with the Individual Hydraulic Systems
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
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