Removal of the Artificial Feel and Trim Unit

TASK 27-23-41-000-001-A
Removal of the Artificial Feel and Trim Unit

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.

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	1	ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE
No specific	AR	CAP - BLANKING
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	WARNING NOTICE(S)
6137-013	1	PIN-LOCKING
6137-060	1	PIN - LOCKING
98D27207547000	1	PIN-RIGGING
98D27207548000	1	PIN-RIGGING

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
325	VERTICAL STABILIZER TRAILING EDGE
312AR, 325BL, 325BR

C. 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 27-23-17-000-001-A	Removal of the Artificial Feel Unlocking Solenoid
TASK 29-00-00-864-001-A	Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action
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 55-33-13-010-002-A	Opening/Removal of the Trailing Edge Access-Panels of the Vertical Stabilizer
Artificial Feel and Trim Unit

3. Job Set-up
Subtask 27-23-41-861-050-A

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

Subtask 27-23-41-865-053-A

B. 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 27-23-41-869-050-A

C. Aircraft Maintenance Configuration

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.

(1) Pressurize the Blue hydraulic system with the electric pump. (Ref. AMM TASK 29-10-00-863-003)
(2) Put the rudder pedals in the neutral position.
(3) Make sure that the RUD TRIM indicator on the panel 110VU of the center pedestal shows zero.
(4) Release the FLT CTL/FAC 1 pushbutton switch on the overhead panel 23VU and the OFF legend comes on.
(5) Release the FLT CTL/FAC 2 pushbutton switch on the overhead panel 24VU and the OFF legend comes on.
(6) Put the WARNING NOTICE(S) in the cockpit to tell persons not to operate the flight controls.
(7) Depressurize the Blue hydraulic system (Ref. AMM TASK 29-10-00-864-003).

Subtask 27-23-41-865-050-A

D. Open, safety and tag this(these) circuit breaker(s):

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 27-23-41-860-050-A

E. Aircraft Maintenance Configuration
(1) Make sure that the hydraulic systems are depressurized and put them in the maintenance configuration
(Ref. AMM TASK 29-00-00-864-001).
(2) De-energize the aircraft electrical circuits. (Ref. AMM TASK 24-41-00-862-002)
(3) Put the WARNING NOTICE(S) in position to tell persons not to operate the hydraulic systems.

Subtask 27-23-41-010-050-B

F. Get Access
(1) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position at zone 312.
(2) Open the access door 312AR.
(3) Put the ACCESS PLATFORM 10M (33 FT) - ADJUSTABLE in position at zone 325.
(4) Open the access panels 325BR 325BL (Ref. AMM TASK 55-33-13-010-002).

Subtask 27-23-41-480-050-A

WARNING: USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.

G. Installation of the Rigging Pins

Artificial Feel and Trim Unit

(1) Put the 98D27207547000 PIN-RIGGING (24) in the rudder cable quadrant.
(2) Put the 98D27207548000 PIN-RIGGING (25) in the mixer of the artifical feel unit.
(3) Remove and discard the lockwire from the blanking plug (31).
(4) Remove the blanking plug (31) from the rigging hole of the rudder trim actuator (4).
(5) For the rudder trim actuators with the part numbers 6137-4 or 6137-5:

Install the 6137-060 PIN - LOCKING (30) in the rigging hole of the rudder trim actuator (4).

(6) For the rudder trim actuators with the part number 6137-3:

Install the 6137-013 PIN-LOCKING (30) in the rigging hole of the rudder trim actuator (4).

(7) Install the blanking plug (31) in the storage hole of the rudder trim actuator (4).

4. Procedure
Subtask 27-23-41-020-050-A

A. Removal of the Artificial Feel and Trim Unit (1)
(1) Disconnect the electrical connector (13) from the solenoid 16CA (3).
(2) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(3) Disconnect the artificial feel and trim unit (1) from the lever arm (2) as follows:
(a) Remove and discard the cotter pin (12).
(b) Remove the nut (11), the washers (10) and (33), the bushes (7) and (32) and the bolt (6). Move the eye-end (23) clear of the lever arm (2).
(4) Disconnect the artificial feel and trim unit (1) from the support bracket (5) as follows:
(a) Remove and discard the cotter pins (20).
(b) Remove the nuts (19), the washers (18), the bushes (15) and the bolts (14).
(5) Move the fork-end (22) clear of the lugs of the support bracket (5).
(6) Disconnect the universal joint (21) from the splined shaft (26) of the rudder trim actuator (4).
(7) Remove the artificial feel and trim unit (1), between the frame and the structure at the right side of the aircraft.

NOTE: Do not disconnect the universal joint (21) from the splined shaft (35) of the artificial feel and trim unit (1) unless a repair or a new installation is necessary.

NOTE: It may be necessary to:

shorten the artificial feel and trim unit (1), and/or,
remove two lower attachment bolts from the frame (one at each side), to increase the clearance available.

(8) Disconnect the solenoid (3) from the artificial feel and trim unit (1), if necessary (Ref. AMM TASK 27-23-17-000-001).
(9) If necessary, disconnect the universal joint (21) from the splined shaft (35) of the artificial feel and trim unit (1) as follows:
(a) Remove and discard the cotter pin (40).
(b) Remove the nut (39), the washer (38), the bolt (36) and the saddle washer (37).
(c) Remove the universal joint (21) from the splined shaft (35).

[Rev.10 from 2021] 2026.03.31 23:49:08 UTC