Adjustment of the Rudder Trim Actuation

TASK 27-22-00-820-001-A
Adjustment of the Rudder Trim Actuation

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.

MOVEMENT OF COMPONENTS CAN KILL OR CAUSE INJURY TO PERSONS AND/OR CAN CAUSE DAMAGE TO THE EQUIPMENT.

WARNING: MAKE SURE THAT THE TRAVEL RANGES OF THE FLIGHT CONTROLS SURFACES ARE CLEAR. MOVEMENT OF FLIGHT CONTROLS CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.

CAUTION: DO THIS PROCEDURE IN A HANGAR IF THERE ARE WIND GUSTS. WIND GUSTS CAN CAUSE DAMAGE TO THE LINKAGE WHEN THE RIGGING PINS ARE IN POSITION ON THE RUDDER CONTROL.

ZONE: 325

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 10M (33 FT) - ADJUSTABLE
No specific	AR	WARNING NOTICE(S)
6137-013	1	PIN-LOCKING
6137-060	1	PIN - LOCKING
98D27207548000	1	PIN-RIGGING

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
325	VERTICAL STABILIZER TRAILING EDGE
325BL, 325BR

C. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
8	COTTER PIN	AIPC 27-23-04-02-080
8	COTTER PIN	AIPC 27-23-84-02-080

D. Referenced Information

REFERENCE	DESIGNATION
TASK 24-41-00-861-002-A	Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01	Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02	Energize the Aircraft Electrical Circuits from Engine 1(2)
TASK 24-41-00-862-002-A	De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01	De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02	De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)
TASK 27-22-00-710-002-A	Operational Test of the Rudder Trim Actuation
TASK 27-22-51-000-001-A	Removal of the Rudder Trim Actuator
TASK 27-22-51-400-001-A	Installation of the Rudder Trim Actuator
TASK 29-10-00-863-003-A	Pressurize the Blue Hydraulic System with a Hydraulic Ground Power-Cart
TASK 29-10-00-863-003-A-01	Pressurize the Blue Hydraulic System with the Blue Electric Pump
TASK 29-10-00-864-003-A	Depressurize the Blue Hydraulic System
TASK 29-23-00-864-001-A	Depressurize the Green and Yellow Hydraulic Systems after Operation of the PTU
TASK 29-24-00-864-001-A	Depressurize the Yellow Hydraulic System
Rudder Trim Actuation - Adjustment ** ON A/C NOT FOR ALL
Rudder Trim Actuation - Adjustment ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 27-22-00-010-050-A

A. Get Access
(1) Put an ACCESS PLATFORM 10M (33 FT) - ADJUSTABLE in position at zone 325.
(2) Open the access doors 325BL 325BR.

Subtask 27-22-00-861-053-A

B. Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).

Subtask 27-22-00-865-050-A

C. Make sure that this(these) circuit breaker(s) is(are) closed:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	AUTO FLT/FAC1/28VDC	5CC1	B04
49VU	AUTO FLT/FAC1/26VAC	14CC1	B03
** ON A/C NOT FOR ALL
49VU	AUTO FLT/FAC1/28VDC	5CC1	H10
49VU	AUTO FLT/FAC1/26VAC	14CC1	H09
** ON A/C ALL
121VU	AUTO FLT/RUDDER/TRIM/IND	15CC	M20
121VU	AUTO FLT/FAC2/28VDC	5CC2	M19
121VU	AUTO FLT/FAC2/26VAC	14CC2	M18

Subtask 27-22-00-860-058-A ** ON A/C NOT FOR ALL

D. Aircraft Maintenance Configuration
(1) On the overhead panel 23VU, make sure that the FLT CTL/FAC1 pushbutton switch is pushed (on this pushbutton switch, the FAULT and OFF legends are off).
(2) On the overhead panel 24VU, make sure that the FLT CTL/FAC2 pushbutton switch is pushed (on this pushbutton switch, the FAULT and OFF legends are off).
(3) Pressurize the Blue hydraulic system
(Ref. AMM TASK 29-10-00-863-003).
(4) Put a WARNING NOTICE(S) in position on the CAPT and F/O pedals to tell persons not to use the rudder mechanical control.
(5) On the center pedestal, on the panel 110VU, make sure that the RUD TRIM indicator shows 0.
(6) Make sure that the trim actuator (4) is set to zero (look through the window and make sure that the mark on the rear face is in the correct position).

Rudder Trim Actuation - Adjustment ** ON A/C NOT FOR ALL

(7) Remove the blanking plug (6) from the trim actuator (4) and install it in the storage hole.
(8) Install the 6137-013 PIN-LOCKING (5) on the trim actuator (4).
(9) Depressurize the Blue hydraulic system
(Ref. AMM TASK 29-10-00-864-003).

Subtask 27-22-00-860-058-B ** ON A/C NOT FOR ALL

Rudder Trim Actuation - Adjustment ** ON A/C NOT FOR ALL

(7) Remove the blanking plug (6) from the trim actuator (4).
(8) Install the 6137-060 PIN - LOCKING (5) on the trim actuator (4).
(9) Depressurize the Blue hydraulic system
(Ref. AMM TASK 29-10-00-864-003).

4. Procedure
Subtask 27-22-00-820-051-A

A. Adjustment of the Rudder Trim Actuation
(1) Install the 98D27207548000 PIN-RIGGING (3) on the mixer (2) of the artificial feel unit. You must be able to install and remove the rigging pin easily.
(2) For all the rigging results, disconnect the artificial feel spring rod (1) at the top to make sure that it is in the zero position. To do this:
(a) Remove the cotter pin (8) and discard it.
(b) Remove the nut (7) and the washer (9).
(c) Remove the bolt (10).
(3) Connect the artificial feel spring rod (1) to the mixer (2). To do this:
(a) Install the bolt (10).
If you cannot install the bolt (10) easily or if you cannot install the rigging pin (3) during the operation before, do these steps:
1 Remove the trim actuator (4) (Ref. AMM TASK 27-22-51-000-001).
2 Turn the universal joint of the artificial-feel spring rod (1) until you can install and remove the rigging pin (3) and the bolt (10) easily.
3 Install the trim actuator (4) (Ref. AMM TASK 27-22-51-400-001).
(b) Install the washer (9), the nut (7) and the new AIPC 27-23-04-02-080 COTTER PIN (8) or AIPC 27-23-84-02-080 COTTER PIN (8).
(4) Remove the rigging pins (3) and (5).
(5) Install the blanking plug (6) on the rigging hole of the trim actuator (4).

Subtask 27-22-00-720-051-A

B. Do the operational test of the rudder trim (Ref. AMM TASK 27-22-00-710-002).

5. Close-up
Subtask 27-22-00-860-057-A

A. Put the aircraft back to its initial configuration.
(1) Depressurize the aircraft hydraulic systems
(Ref. AMM TASK 29-23-00-864-001) (Ref. AMM TASK 29-24-00-864-001) (Ref. AMM TASK 29-10-00-864-003).
(2) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).
(3) Make sure that the work area is clean and clear of tools and other items.

Subtask 27-22-00-410-050-A

B. Close Access
(1) Close the access doors 325BL 325BR.
(2) Remove the access platform(s).

[Rev.10 from 2021] 2026.03.31 23:48:53 UTC