Adjustment of the Rudder Control-Cables Length

TASK 27-21-00-820-002-A
Adjustment of the Rudder Control-Cables Length

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: MAKE SURE THAT THE AIRCRAFT IS IN THE TEMPERATURE CONDITIONS (STABLE AMBIENT TEMPERATURE) SPECIFIED IN THE AIRCRAFT MAINTENANCE CONFIGURATION PARAGRAPH. CHANGES IN THE TEMPERATURE CAN CAUSE INCORRECT MEASUREMENTS.

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: 120
ZONE: 130
ZONE: 131
ZONE: 132
ZONE: 150
ZONE: 210
ZONE: 240
ZONE: 310

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 2M (6 FT)
No specific	1	ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE
No specific	AR	CABLE TENSIOMETER
No specific	AR	MIRROR - INSPECTION, FLEXIBLE
No specific	AR	THERMOMETER
No specific	AR	WARNING NOTICE(S)
98A27901002000	1	PIN-RIGGING,RUDDER CONTROL
98D27203500000	1	BRACKET RUD CTL REG
98D27207516000	1	PIN-RIGGING,SET
98D27207547000	1	PIN-RIGGING

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.14QEB1)	Wire-Locking Dia: 0.6 mm CRES Nickel Alloy -
(Material No.14QFB1)	Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
120	AVIONICS COMPARTMENT
130	FWD CARGO COMPT AFT BULKHEAD OF AVNCS COMPT TO FWD PRESSURE BULKHEAD OF WING CENTER BOX
131	FORWARD CARGO COMPARTMENT
132	FORWARD CARGO COMPARTMENT
150	AFT CARGO COMPARTMENT FWD PRESS BULKHEAD TO AFT BULKHEAD OF AFT CARGO COMPARTMENT
210	CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD
240	MID PASSENGER COMPARTMENT
310	FUSLG TAIL SECTION AFT OF AFT PRESS BHD
312AR, 811, 812, 824, 825, 826

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
3	LOCKING CLIPS	AIPC 27-21-01-11-010
3	LOCKING CLIPS	AIPC 27-21-81-11-010

E. Referenced Information

REFERENCE	DESIGNATION
TASK 12-33-21-618-001-A	Pre-conditioning through the LP Ground Connection (Aircraft Electrical Power Available)
TASK 12-33-21-618-001-A-01	Pre-conditioning through the HP Ground Connection
TASK 12-33-21-618-001-A-02	Pre-conditioning with the APU
TASK 12-33-21-618-001-A-03	Pre-conditioning through the LP Ground Connection (Aircraft Electrical Power Not Available)
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 27-21-00-210-002-A	Detailed Inspection of the Control Cables
TASK 27-21-00-820-004-A	Shortening of the Rudder Control Cable
TASK 27-21-00-840-001-A	Removal/Installation of the control rod on the rudder mechanical control
TASK 27-24-00-710-001-A	Operational Test of the Rudder Hydraulic Actuation
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 53-12-11-000-001-A	Removal of the Cockpit Floor Panels from FR1 thru FR12
TASK 53-12-11-400-001-A	Installation of the Cockpit Floor Panels from FR1 thru FR12
TASK 53-32-12-000-002-A	Removal of the Cabin Floor Panels
TASK 53-32-12-400-002-A	Installation of the Cabin Floor Panels
TASK 27-21-45-000-001-A	Removal of the Cable Tension Regulator Assy (for corrective action)
TASK 27-21-45-400-001-A	Installation of the Cable Tension Regulator Assy (for corrective action)
TASK 27-21-61-000-001-A	Removal of the Rudder Control Cables (for corrective action)
TASK 27-21-61-400-001-A	Installation of the Rudder Control Cables (for corrective action)
TASK 06-41-53-00	FUSELAGE-DESCRIPTION AND OPERATION
Component Location ** ON A/C NOT FOR ALL
Adjustment Graph
Component Location ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 27-21-00-010-076-A

A. Get Access
(1) Put an ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position at the access door 312AR.
(2) Open the access door 312AR.
(3) Put an ACCESS PLATFORM 2M (6 FT) in position at the access door 811.
(4) Open the access door 811.
(5) Put an ACCESS PLATFORM 2M (6 FT) in position at the access door 812.
(6) Open the access door 812.
(7) Put an ACCESS PLATFORM 2M (6 FT) in position at the access door 824.
(8) Open the access door 824.
(9) Put an ACCESS PLATFORM 2M (6 FT) in position at the cargo compartment door 825.
(10) Open the cargo compartment door 825.
(11) Put an ACCESS PLATFORM 2M (6 FT) in position at the cargo compartment door 826.
(12) Open the cargo compartment door 826.
(13) Remove the floor panels :

NOTE: Refer to AMM chapter 06 for panels details (Ref. AMM D/O 06-41-53-00).

(a) In the zone 211:
1 Remove the cockpit floor panels between FR08 and FR11 (Ref. AMM TASK 53-12-11-000-001).
(b) In the zone 241:
1 Remove the cabin floor panels between FR35 and FR42 (Ref. AMM TASK 53-32-12-000-002).

Subtask 27-21-00-860-050-A ** ON A/C NOT FOR ALL

B. Aircraft Maintenance Configuration
(1) Make sure that the aircraft electrical circuits are de-energized
(Ref. AMM TASK 24-41-00-862-002).
(2) Make sure that the air conditioning does not operate (Ref. AMM TASK 12-33-21-618-001).
(3) Make sure that there is no neon light on, near the cable, in the cable routing area.
(4) Let the temperature in the aircraft become stable for a period of three hours before you start the adjustment.

NOTE: You can do other maintenance actions during the three hour period if they do not change the ambient temperature (No source of heat or cold, aircraft not energized, no air conditioning, no neon light sources in the cable routing area).

(5) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
(6) Pressurize the Blue hydraulic system
(Ref. AMM TASK 29-10-00-863-003).
(7) On the center pedestal, on the panel 110VU, make sure that the RUD TRIM indicator shows 0.
(8) On the overhead panel 23VU, make sure that the FLT CTL/FAC1 pushbutton switch is pushed (the OFF legend is off).
(9) On the overhead panel 24VU, make sure that the FLT CTL/FAC2 pushbutton switch is pushed (the OFF legend is off).
(10) Operate the rudder pedals fully more than ten times and put them in the zero position.
(11) Put WARNING NOTICE(S) in position on the rudder pedals (CAPT and F/0) to tell persons not to operate them.
(12) Install the 98D27207547000 PIN-RIGGING or 98D27207516000 PIN-RIGGING,SET (9) on the cable quadrant (6).
(13) Depressurize the Blue hydraulic system
(Ref. AMM TASK 29-10-00-864-003).
(14) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).
(15) Remove the control rod (5) between the mixer and the cable quadrant (6) (Ref. AMM TASK 27-21-00-840-001).
(16) Do a check of the dimension 25 +2 mm or -2 mm (0.9843 +0.0787 in. or -0.0787 in.) on the cable quadrant (6).
If the dimension is not correct, adjust it as follows:
(a) Remove the lockwire from the nuts (8) and discard it.
(b) Loosen the nuts (8).
(c) Turn the bolts (7) until you get the correct dimension.
(d) Tighten the nuts (8). Do not safety the nuts (8) at this time.

Subtask 27-21-00-860-050-B ** ON A/C NOT FOR ALL

B. Aircraft Maintenance Configuration
(1) Make sure that the aircraft electrical circuits are de-energized
(Ref. AMM TASK 24-41-00-862-002).
(2) Make sure that the air conditioning is not in operation (Ref. AMM TASK 12-33-21-618-001).
(3) In the cable routing area, near the cable, make sure that no neon light is on.
(4) Before you start the adjustment, let the temperature in the aircraft become stable for three hours.

NOTE: It is permitted to do other maintenance tasks during the three-hour period, if they do not change the ambient temperature (no source of heat or cold, aircraft not energized, no air conditioning, no neon light sources in the cable routing area).

(5) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
(6) Pressurize the Blue hydraulic system
(Ref. AMM TASK 29-10-00-863-003).
(7) On the center pedestal, on panel 110VU, make sure that the RUD TRIM indicator shows 0.
(8) On overhead panel 23VU, make sure that the FLT CTL/FAC1 pushbutton switch is pushed (OFF legend off).
(9) On overhead panel 24VU, make sure that the FLT CTL/FAC2 pushbutton switch is pushed (OFF legend off).
(10) Operate the rudder pedals fully, more than ten times and put them in the zero position.
(11) Put the WARNING NOTICE(S) in position on the rudder pedals (CAPT and F/O) to tell persons not to operate them.
(12) Install the 98D27207547000 PIN-RIGGING or the 98D27207516000 PIN-RIGGING,SET (9) on the cable quadrant (6).
(13) Depressurize the Blue hydraulic system
(Ref. AMM TASK 29-10-00-864-003).
(14) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).
(15) Remove the control rod (5) between the mixer and the cable quadrant (6) (Ref. AMM TASK 27-21-00-840-001).
(16) Make sure that the dimension of the cable quadrant (6) is 22.9 +2 mm or -2 mm (0.9016 +0.0787 in. or -0.0787 in.).
If the dimension is not correct, adjust it as follows:
(a) Remove the lockwire from the nuts (8) and discard it.
(b) Loosen the nuts (8).
(c) Turn the bolts (7) until you get the correct dimension.
(d) Tighten the nuts (8). Do not safety the nuts (8) at this time.

4. Procedure
Subtask 27-21-00-820-053-A ** ON A/C NOT FOR ALL

A. Adjustment of the Cable Linkage Assembly
(1) Measure the ambient temperature with a THERMOMETER.
(2) Use the adjustment graph to find the position of the index of the cable tension regulator (1), in relation to the ambient temperature.
(3) Install the 98D27203500000 BRACKET RUD CTL REG (10) on the mark (on the left or right side) of the flange of the cable tension regulator (1) (access door 811).
(a) With this tool, align the mark on the cable tension regulator (1) with the related graduation on the fixed scale (11).
(4) Bend the two cables to the same value and release them quickly. When you release the cables, make sure that the two quadrants of the tension regulator move easily (they are not caught).
(5) Remove the locking clips (3) from the turnbuckles (2).
(6) Turn the two turnbuckles (2) by the same value to adjust the length of the cable loop and:
(a) Read the value on the fixed scale (11) with a MIRROR - INSPECTION, FLEXIBLE. Make sure that the position of the index of the tension regulator (1) agrees with the values found on the graph.
(b) Install the locking clips (3) on the turnbuckles (2).
(c) Make sure that you can easily install (and remove) the 98A27901002000 PIN-RIGGING,RUDDER CONTROL (4) on (from) the input lever of the cable tension regulator (1).
(7) If you cannot install the 98A27901002000 PIN-RIGGING,RUDDER CONTROL easily, adjust the bolt (7):
(a) If necessary, remove the lockwire from the nuts (8) and discard it.
(b) Loosen the nuts (8) from the cable quadrant (6).
(c) Turn the bolts (7) on the cable quadrant (6) and make sure that:

The position of the index of the tension regulator (1) agrees with the values on the graph.
You can easily install (and remove) the 98A27901002000 PIN-RIGGING,RUDDER CONTROL (4) on (from) the input lever of the cable tension regulator (1).

(d) Do a check of the dimensions 25 +2 mm or -2 mm (0.9843 +0.0787 in. or -0.0787 in.).
(e) Tighten the nuts (8) on the cable quadrant (6). Do not safety the nuts (8) at this time.
(8) If you cannot adjust the control cables, do a visual inspection of the pulleys, of the tension regulator and the control cables (Ref. AMM TASK 27-21-00-210-002).
(a) If they are in good condition:
1 Make a mark on each front cable.
2 Pull the cables to the rear until the position of the index agrees with the value on the graph.
3 Keep the cables pulled and make a new mark on each front cable. Then, release the cables.
4 Measure the length between the two marks of each cable.

If the length is more than 45 mm (1.7717 in.), decrease the length of the control cables (Ref. AMM TASK 27-21-00-820-004).
If the length is less than 45 mm (1.7717 in.), replace the rear control cables (Ref. AMM TASK 27-21-61-000-001) (Ref. AMM TASK 27-21-61-400-001).

(9) Install the AIPC 27-21-01-11-010 LOCKING CLIPS (3) on the turnbuckles (2).
Connect the control rod (5) between the cable quadrant and the mixer (Ref. AMM TASK 27-21-00-840-001). Make sure that you can install the bolts easily.
If not, do these steps:
(a) Cut and remove the lockwire from the nuts of the rod (5).
(b) Loosen the nuts.
(c) Release the lockwashers.
(d) Adjust the length of the rod until you can push the bolts freely.
(e) Engage the lockwashers.
(f) Tighten the nuts.
(g) Make sure that the adjustment is correct.
(h) Installation of the lockwire

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.

1 Safety the nuts with 14QFB1Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -.
(10) Remove the 98D27207547000 PIN-RIGGING or 98D27207516000 PIN-RIGGING,SET (9) from the cable quadrant (6).
(11) Remove the 98A27901002000 PIN-RIGGING,RUDDER CONTROL (4) from the tension regulator (1).
(12) With a CABLE TENSIOMETER, measure the tension of each cable, in each cargo compartment, between two static fairleads.
(a) Make sure that the tension of the two cables is 22 +4 daN or -4 daN (49.4580 +8.9924 lbf or -8.9924 lbf).
(b) If the tension is not correct, replace the cable tension regulator (1) (Ref. AMM TASK 27-21-45-000-001) (Ref. AMM TASK 27-21-45-400-001).

Subtask 27-21-00-820-053-B ** ON A/C NOT FOR ALL

The position of the index of the tension regulator (1) agrees with the values on the graph.
You can easily install (and remove) the 98A27901002000 PIN-RIGGING,RUDDER CONTROL (4) on (from) the input lever of the cable tension regulator (1).

(d) Do a check of the dimensions 22.9 +2 mm or -2 mm (0.9016 +0.0787 in. or -0.0787 in.).
(e) Tighten the nuts (8) on the cable quadrant (6). Do not safety the nuts (8) at this time.
(8) If you cannot adjust the control cables, do a visual inspection of the pulleys, of the tension regulator and the control cables (Ref. AMM TASK 27-21-00-210-002).
(a) If they are in good condition:
1 Make a mark on each front cable.
2 Pull the cables to the rear until the position of the index agrees with the value on the graph.
3 Keep the cables pulled and make a new mark on each front cable. Then, release the cables.
4 Measure the length between the two marks of each cable.

If the length is more than 45 mm (1.7717 in.), decrease the length of the control cables (Ref. AMM TASK 27-21-00-820-004).
If the length is less than 45 mm (1.7717 in.), replace the rear control cables (Ref. AMM TASK 27-21-61-000-001) (Ref. AMM TASK 27-21-61-400-001).

(9) Install the AIPC 27-21-01-11-010 LOCKING CLIPS (3) or AIPC 27-21-81-11-010 LOCKING CLIPS (3) on the turnbuckles (2).
Connect the control rod (5) between the cable quadrant and the mixer (Ref. AMM TASK 27-21-00-840-001). Make sure that you can install the bolts easily.
If not, do these steps:
(a) Cut and remove the lockwire from the nuts of the rod (5).
(b) Loosen the nuts.
(c) Release the lockwashers.
(d) Adjust the length of the rod until you can push the bolts freely.
(e) Engage the lockwashers.
(f) Tighten the nuts.
(g) Make sure that the adjustment is correct.
(h) Installation of the lockwire

Subtask 27-21-00-710-053-A

B. Test
(1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
(2) Pressurize the Blue hydraulic system (Ref. AMM TASK 29-10-00-863-003).
(3) Operate the rudder pedals fully more than ten times and put them in the zero position.
(4) Do an operational test of the rudder hydraulic actuation (Ref. AMM TASK 27-24-00-710-001).
(5) Install the rigging pin (4) on the input lever of the tension regulator (1).
(6) Depressurize the Blue hydraulic system
(Ref. AMM TASK 29-10-00-864-003).
(7) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).
(8) Make sure that:

The calibration value you found on the scale during the adjustment is still aligned with the index of the tension regulator (1) with a tolerance of + or - 1/2 graduation.

(9) Make sure that you can easily install the rigging pin (9) on the cable quadrant (6).
(10) With a CABLE TENSIOMETER, measure the tension of the two cables, in each cargo compartment between two static fairleads.
Repeat this operation twice to valid the measurement.
(11) Make sure that the tension value is 22 +4 daN or -4 daN (49.4580 +8.9924 lbf or -8.9924 lbf).
(12) Installation of the lockwire

(a) Safety the nuts (8) with 14QEB1Wire-Locking Dia: 0.6 mm CRES Nickel Alloy -.
(13) Remove the rigging pins (9) and (4).
(14) Remove the 98D27203500000 BRACKET RUD CTL REG (10) from the flange of the cable tension regulator (1).

5. Close-up
Subtask 27-21-00-942-060-A

A. Make sure that the work area is clean and clear of tools and other items.

Subtask 27-21-00-410-068-A

B. Close Access
(1) Install the floor panels:

NOTE: Refer to AMM chapter 06 for panels details (Ref. AMM D/O 06-41-53-00).

(a) In the zone 241:
1 Install the cabin floor panels between FR35 and FR42 (Ref. AMM TASK 53-32-12-400-002).
(b) In the zone 211:
1 Install the cockpit floor panels between FR08 and FR11 (Ref. AMM TASK 53-12-11-400-001).
(2) Remove the access platform(s).
(3) Remove the warning notice(s).

[Rev.10 from 2021] 2026.04.01 06:47:44 UTC