Installation of the Pedal Position Adjuster Assembly

TASK 27-21-43-400-002-A
Installation of the Pedal Position Adjuster Assembly

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: 120
ZONE: 210

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) - ADJUSTABLE
98A27901002000	1	PIN-RIGGING,RUDDER CONTROL

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.03HBD9)	Synthetic Ester base Grease-General Purpose Low Temp -
No specific	lockwire corrosion resistant steel dia 0.8 mm (0.03 in.)

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
120	AVIONICS COMPARTMENT
210	CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD
811

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
45	CLIP	AIPC 27-21-01-02-010
22	COTTER PIN	AIPC 27-21-01-02-040
23	COTTER PIN	AIPC 27-21-01-02-040
30	COTTER PIN	AIPC 27-21-01-02-040
33	COTTER PINS	AIPC 27-21-01-02-095
45	CLIP	AIPC 27-21-81-02-010
22	COTTER PIN	AIPC 27-21-81-02-110
23	COTTER PIN	AIPC 27-21-81-02-110
30	COTTER PIN	AIPC 27-21-81-02-110
33	COTTER PINS	AIPC 27-21-81-02-250

E. Referenced Information

REFERENCE	DESIGNATION
TASK 24-42-00-861-001-A	Energize the Ground Service Network from the External Power
TASK 24-42-00-862-001-A	De-energize the Ground Service Network Supplied from the External Power
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
Rigging Pin Location ** ON A/C NOT FOR ALL
Rigging Pin Location ** ON A/C NOT FOR ALL
Component Location ** ON A/C NOT FOR ALL
Rack Assembly
Component Location ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 27-21-43-860-054-A

A. Aircraft Maintenance Configuration
(1) Make sure that the ground service network is energized (Ref. AMM TASK 24-42-00-861-001).
(2) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position.
(3) Make sure that the access door 811 is open.
(4) Make sure that the Blue hydraulic system is depressurized (Ref. AMM TASK 29-10-00-863-003).
(5) On the center pedestal, on the panel 110VU, make sure that the RUD TRIM indicator shows 0.
(6) Make sure that the 98A27901002000 PIN-RIGGING,RUDDER CONTROL (1) is installed on the yaw/brake bellcrank (see detail B)

Rigging Pin Location ** ON A/C NOT FOR ALL

4. Procedure
Subtask 27-21-43-420-055-B

A. Installation of the Pedal Position-Adjuster Assembly
(1) Clean the component interfaces and the adjacent area.
(2) Do an inspection of the component interfaces and the adjacent area.
(3) Apply Synthetic Ester base Grease-General Purpose Low Temp - (Material No.03HBD9) to the attachment hardware.
(4) Install the springs (41) and (42) on the rack assembly (26).
(5) Lift the lower part of the rack assembly (26) to compress the springs (41) and (42).
(6) Install the rack assembly (26) on the yoke (29) with the spacer (28) and on the structure (19) with the bolt (18).
(7) Install the washer (20), nut (21) and the new AIPC 27-21-01-02-040 COTTER PIN (22) or the AIPC 27-21-81-02-110 COTTER PIN (22).
(8) Install the washers (25), bolt (27), nut (24) and the new AIPC 27-21-01-02-040 COTTER PIN (23) or the AIPC 27-21-81-02-110 COTTER PIN (23).
(9) Install the nut (43) and the screw (44).
(a) Engage all the threads of the screw (44) but do not fully tighten it.
(10) Install the actuator (37) with the pins (36) on the structure (35) and the yoke (29).
(11) Install the washers (34) and the new AIPC 27-21-01-02-095 COTTER PINS (33) or the AIPC 27-21-81-02-250 COTTER PINS (33).
(12) Install the cable (17) through the screw (44) and to the lower part of the rack assembly (26) with the pin (40).

NOTE: The pin (40) has a slot and a recess for the head of the cable (17).

(13) Install the locking pin (46).
(14) Install the cover (5) on the structure (8) and (9).
(15) Put the cable (17) through the cover (5) and install the pin (16) on the handle (15).

NOTE: The pin (16) has a slot and a recess for the head of the cable (17).

(16) Install the new AIPC 27-21-01-02-010 CLIP (45) or the AIPC 27-21-81-02-010 CLIP (45).
(17) Install the washers (11) and the screws (10).
(18) Install the washers (7) and the screws (6).
(19) Connect the rod (39) to the yoke (29) with the screw (38).
(20) Install the washer (32), the nut (31) and the new AIPC 27-21-01-02-040 COTTER PIN (30) or the AIPC 27-21-81-02-110 COTTER PIN (30).

Subtask 27-21-43-820-050-A

B. Adjustment

Rack Assembly

NOTE: During the adjustment of the cable length, make sure that the terminal heads of the cables (17) are in position in their housings.

(1) Adjust the length of each rack unlocking control-cable so that the adjustment position limits, the non-control clearance (measured at the handle) is between 0.8 mm (0.0315 in.) and 2 mm (0.0787 in.).
(a) Slowly loosen the screw (44) until you get a non-control clearance at the handle (15) (Ref. Section CC).

Position 0: non-control clearance more than or equal to 0.8 mm (0.0315 in.).
Position 12: non-control clearance less than or equal to 2 mm (0.0787 in.).

(2) Tighten the nut (43).
(3) Safety the nut (43) with lockwire corrosion resistant steel dia 0.8 mm (0.03 in.).

Subtask 27-21-43-710-051-A

C. Operational Test
(1) Remove the pin (1) (Ref. Detail B).

Rigging Pin Location ** ON A/C NOT FOR ALL

(2) Do two or three operations from one stop to the other stop.
To do this:
(a) Pull the handle (15).
(b) Apply a force to move the pedals to the stop.
(c) Release the force applied on the pedals.
(d) The pedals go back freely to the opposite stop because the actuator (37) operated.
(e) Release the handle (15).
(3) When the pedal is against the stop, make sure that the non-control clearance is correct. This shows that the rack assembly (26) is locked.
Do the adjustment again if it is not correct.
(4) Do two or three pedal movements to the intermediate position 6 to check that the mechanism holds the pedals.
To do this:
(a) Pull the handle (15).
(b) Apply a force to move the pedals to the intermediate position 6.
(c) Release the handle (15).
(d) Release the force applied on the pedals.
(e) Do two or three rudder pedal movements in order to check that the mechanism holds the pedals.

5. Close-up
Subtask 27-21-43-860-055-A

A. Put the aircraft back to its initial configuration
(1) Make sure that the work area is clean and clear of tools and other items.
(2) De-energize the ground service network
(Ref. AMM TASK 24-42-00-862-001)

Subtask 27-21-43-410-053-A

B. Close Access
(1) Close the access door 811.
(2) Remove the access platform(s).

[Rev.10 from 2021] 2026.04.01 06:48:45 UTC