Installation of the Control Mechanism-Pitch Trim

TASK 27-41-41-400-001-A
Installation of the Control Mechanism-Pitch Trim

WARNING: MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON THE LANDING GEAR. THIS WILL PREVENT UNWANTED MOVEMENT OF THE LANDING GEAR, AND THUS POSSIBLE INJURY TO PERSONS AND DAMAGE TO THE AIRCRAFT AND/OR 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.

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 3M (10 FT)- ADJUSTABLE
No specific	Torque wrench: range to between 1.38 and 1.06 m.daN (122.12 and 93.81 lbf.in )

B. Consumable Materials

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

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
310	FUSLG TAIL SECTION AFT OF AFT PRESS BHD
312AR

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
12	COTTER PINS	AIPC 27-41-01-01-010
12	COTTER PINS	AIPC 27-41-81-01-010

E. Referenced Information

REFERENCE	DESIGNATION
TASK 22-82-12-400-002-A	Installation of the Multipurpose Control & Display Unit (MCDU)
TASK 23-13-13-400-001-A	Installation of the Radio Management Panel (RMP)
TASK 23-51-12-400-001-A	Installation of the Audio Control Panel (ACP)
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 29-23-00-863-001-A	Pressurize the Green Hydraulic System from the Yellow Hydraulic System through the PTU with the Electric Pump
TASK 29-23-00-864-001-A	Depressurize the Green and Yellow Hydraulic Systems after Operation of the PTU
TASK 29-24-00-863-001-A	Pressurize the Yellow Hydraulic System with the Electric Pump
TASK 29-24-00-864-001-A	Depressurize the Yellow Hydraulic System
TASK 34-41-12-400-001-A	Installation of the Weather-Radar Control Unit
TASK 34-52-12-400-001-A	Installation of the ATC/TCAS Control Unit
Pitch Trim Control Mechanism
Pitch Trim Control Mechanism ** ON A/C NOT FOR ALL
Pitch Trim Control Mechanism ** ON A/C NOT FOR ALL
Position of the Green Band / CG (Center of Gravity) Scale
Panels 111VU and 112VU

3. Job Set-up
Subtask 27-41-41-860-051-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Make sure that the THS control is in the 0 position.
(2) Make sure that the Yellow hydraulic system (Ref. AMM TASK 29-24-00-864-001) is depressurized.
(3) Make sure that the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE is in position at zone 310.
(4) Make sure that the access door 312AR is open.

Subtask 27-41-41-865-051-A ** ON A/C NOT FOR ALL

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	LIGHTING/EMER LT/CKPT/DOME	1LE	H08
** ON A/C NOT FOR ALL
49VU	LIGHTING/EMER LT/CKPT/DOME	1LE	H06
** ON A/C NOT FOR ALL
122VU	LIGHTING/INSTL LT/MAIN INST/PNL AND/PED	4LF	Y04
122VU	LIGHTING/FLOOD/CTR INST/PNL	2LE	Z04

4. Procedure
Subtask 27-41-41-640-050-A ** ON A/C NOT FOR ALL

A. Apply lubricant on the components
(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) on the components.

Subtask 27-41-41-420-050-A ** ON A/C NOT FOR ALL

B. Installation of the Pitch Trim Control Mechanism
(1) Before the installation, make sure that the position of the green band / CG (Center of Gravity) scale of the pitch-trim indicator is in accordance with the table given in the figure.

Position of the Green Band / CG (Center of Gravity) Scale ** ON A/C NOT FOR ALL

(2) Install the shaft (28) and the bearings (33) on the structure.
(3) Install the spacers (32).
(4) Install the gear (31) and the pitch-trim indicator (30) on the CAPT side.

Align the 0 mark of the pitch-trim indicator with the fixed pointer of the pedestal index (Ref. Detail C) with a maximum clearance of 2.54 mm (0.1000 in.).

(5) Install the gear (34) and the pitch-trim indicator (35) on the F/O side.

Align the 0 mark of the pitch-trim indicator with the fixed pointer of the pedestal index (Ref. Detail C) with a maximum clearance of 2.54 mm (0.1000 in.).

(6) Install the pitch-trim wheels (29).
(7) Install the washers (10) and the nuts (11).
(8) TORQUE the nuts (11) to between 1.38 and 1.06 m.daN (122.12 and 93.81 lbf.in )

.
(9) Install the new AIPC 27-41-01-01-010 COTTER PINS (12) or AIPC 27-41-81-01-010 COTTER PINS (12).
(10) Install the rib (20) on the structure.
(11) Install the washers (16) and the screws (18), (19), (21).
(12) Install the rib (26) on the structure.
(13) Install the washers (16) and the screws (18), (19), (21).
(14) Safety the screws (18), (19) and (21) with corrosion-resistant steel lockwire dia 0.8 mm (0.03 in.).
(15) Put the plate (24) in the correct position on the structure.
(16) Install the washers (23) and the screws (22).
(17) Put the plate (25) in correct position on the structure.
(18) Install the washers (23) and the screws (22).
(19) Install the plates (14), (15), (17) and (27).
(20) Install the screws (13).

Subtask 27-41-41-080-050-A ** ON A/C NOT FOR ALL

C. Remove the 0U190360 PIN-RIGGING,THS ACTUATOR,MECHANICAL INPUT LEVER (6) from the input lever of the screw jack (5) (Ref. Details D and E).

Pitch Trim Control Mechanism ** ON A/C NOT FOR ALL

Subtask 27-41-41-866-050-A ** ON A/C NOT FOR ALL

D. Test
(1) Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).
(2) Pressurize the Yellow and Green hydraulic systems (Ref. AMM TASK 29-24-00-863-001) (Ref. AMM TASK 29-23-00-863-001).
(3) On the overhead panel 23VU, release the FLT CTL/ELAC1 and FLT CTL/SEC1 pushbutton switches (on these pushbutton switches, the OFF legends come on).
(4) On the overhead panel 24VU, release the FLT CTL/ELAC2, FLT CTL/SEC2 and FLT CTL/SEC3 pushbutton switches (on these pushbutton switches, the OFF legends come on).
(5) Slowly move one of the pitch-trim control wheels to the DN stop (the motion must be smooth and constant over all the travel).
(6) On the overhead panel 24VU, push the FLT CTL/ELAC2 pushbutton switch.
(a) The OFF legend goes off.
(b) After 6 seconds, the pitch-trim control wheel goes back to the 0 position.

5. Close-up
Subtask 27-41-41-860-052-A ** ON A/C NOT FOR ALL

A. Put the aircraft back to its initial configuration.
(1) On the overhead panel 23VU, push the FLT CTL/ELAC1 and FLT CTL/SEC1 pushbutton switches (on these pushbutton switches, the OFF legends go off).
(2) On the overhead panel 24VU, push the FLT CTL/SEC2 and FLT CTL/SEC3 pushbutton switches (on these pushbutton switches, the OFF legends go off).
(3) Depressurize the Yellow and Green hydraulic systems (Ref. AMM TASK 29-23-00-864-001) (Ref. AMM TASK 29-24-00-864-001).

Subtask 27-41-41-410-054-A ** ON A/C NOT FOR ALL

B. Install the peripheral equipments
(1) Install the panels 111VU and 112VU.

Panels 111VU and 112VU ** ON A/C NOT FOR ALL

NOTE: The installation procedure is the same for the panels 111VU and 112VU.

(a) Remove the blanking caps from the connectors (2) and (3).
(b) Connect the connector (2) to the panel (1).
(c) Install the panel (1) on the structure.
(d) Fully tighten the fasteners of the panel (1).
(2) Install the MCDUs (3CA1 and 3CA2) (Ref. AMM TASK 22-82-12-400-002).
(3) Install the radio management panels (1RG1 and 1RG2) (Ref. AMM TASK 23-13-13-400-001).
(4) Install the audio control panels (2RN1 and 2RN2) (Ref. AMM TASK 23-51-12-400-001).
(5) Install the weather radar control unit (3SQ) (Ref. AMM TASK 34-41-12-400-001).
(6) Install the ATC control unit (3SH) (Ref. AMM TASK 34-52-12-400-001).

Subtask 27-41-41-865-052-A ** ON A/C NOT FOR ALL

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	LIGHTING/EMER LT/CKPT/DOME	1LE	H08
** ON A/C NOT FOR ALL
49VU	LIGHTING/EMER LT/CKPT/DOME	1LE	H06
** ON A/C NOT FOR ALL
122VU	LIGHTING/INSTL LT/MAIN INST/PNL AND/PED	4LF	Y04
122VU	LIGHTING/FLOOD/CTR INST/PNL	2LE	Z04

Subtask 27-41-41-710-050-A ** ON A/C NOT FOR ALL

D. Do an operational test of the panels 111VU and 112VU.
(1) Operate the light adjustment knobs of the panels 111VU and 112VU.
(2) Make sure that the light intensity of the panels 13VU, 130VU, 131VU and 48VU changes.

Subtask 27-41-41-410-053-A ** ON A/C NOT FOR ALL

E. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the access door 312AR.
(3) Remove the access platform(s).

Subtask 27-41-41-862-050-A ** ON A/C NOT FOR ALL

F. De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.03.31 23:50:54 UTC