Installation of the Electronic Module of the Rudder Travel Limitation Unit

TASK 27-23-51-400-002-A
Installation of the Electronic Module of the Rudder Travel Limitation 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.

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.

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

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	AR	ACCESS PLATFORM 10M (33 FT) - ADJUSTABLE
No specific	AR	WARNING NOTICE(S)
98D27207545000	3	PIN-RIGGING

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.08BAA9)	Non Aqueous Cleaner-General - -
(Material No.14SBA1)	Textile-Lint free Cotton -
No specific	lockwire, corrosion-resistant steel, dia. 0.8 mm (0.032 in.)

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
325	VERTICAL STABILIZER TRAILING EDGE
325CL, 325CR, 325DL, 325DR

D. Referenced Information

REFERENCE	DESIGNATION
TASK 22-61-00-710-001-A	Operational Test of the Rudder-Travel Limiting Function
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 29-00-00-864-001-A	Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action
Electronic Module

3. Job Set-up
Subtask 27-23-51-860-056-A

A. 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) Make sure that the aircraft electrical circuits are de-energized (Ref. AMM TASK 24-41-00-862-002).
(3) Make sure that the WARNING NOTICE(S) are in position.
(4) Make sure that the rudder pedals are in the neutral position.
(5) Make sure that the RUD TRIM indicator on the panel 110VU of the center pedestal shows zero.
(6) Make sure that the FLT CTL/FAC 1 pushbutton switch on the overhead panel 23VU is released.
(7) Make sure that the FLT CTL/FAC 2 pushbutton switch on the overhead panel 24VU is released.
(8) Make sure that the ACCESS PLATFORM 10M (33 FT) - ADJUSTABLE is in position at zone 325.
(9) Make sure that the access panels 325DL 325DR 325CL 325CR at the trailing edge of the vertical stabilizer (1) are open.
(10) Make sure that the 98D27207545000 PIN-RIGGING (4) is installed in the bellcrank assembly (4) for the travel limitation unit (1).
(11) Make sure that the two 98D27207545000 PIN-RIGGING (4) are installed in each lever of the travel limitation unit (1).

Subtask 27-23-51-865-053-A

B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:

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

4. Procedure
Subtask 27-23-51-420-051-A

A. Installation of the Electronic Module
(1) If necessary, use a Textile-Lint free Cotton - (Material No.14SBA1) and clean the contact surface with Non Aqueous Cleaner-General - - (Material No.08BAA9) before you install the electronic module.
(2) Put the electronic module (2) in position on the travel limitation unit (1).
(3) Tighten the captive bolts (3).
(4) Safety the captive bolts (3) with lockwire, corrosion-resistant steel, dia. 0.8 mm (0.032 in.).

Subtask 27-23-51-080-051-A

B. Removal of the Rigging Pins
(1) Remove the two 98D27207545000 PIN-RIGGING (4) from the levers of the rudder travel limitation unit (1).
(2) Remove the 98D27207545000 PIN-RIGGING (4) from the bellcrank assembly of the rudder travel limitation unit (1).

Subtask 27-23-51-865-057-A

C. Remove the safety clip(s) and the tag(s) and close 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 27-23-51-860-057-A

D. Preparation for the Test
(1) Make sure that the travel range of the rudder (2), the rudder travel limitation unit (5) is clear of tools and other items.
(2) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
(3) On the overhead panel 23VU, push the FLT CTL/FAC 1 pushbutton switch and make sure that the OFF legend goes off.
(4) On the overhead panel 24VU, push the FLT CTL/FAC 2 pushbutton switch and make sure that the OFF legend goes off.

Subtask 27-23-51-710-051-A

E. Do an operational test of the travel limitation unit (Ref. AMM TASK 22-61-00-710-001).

5. Close-up
Subtask 27-23-51-010-052-A

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the access panels 325DL and 325CL or 325DR and 325CR which you opened before.
(3) Remove the WARNING NOTICE(S).
(4) Remove the access platform(s).

[Rev.10 from 2021] 2026.03.31 23:49:14 UTC