Installation of the Electrical Load Sensing Device

TASK 27-44-51-400-802-A
Installation of the Electrical Load Sensing Device

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: 210
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	AR	CAP - BLANKING
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 5 and 4 m.N (44.25 and 35.40 lbf.in )
98D27403500000	1	PITCH TRIM CONTROL LOCKING

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.06LCG9)	Non Hardening Jointing Putty-Medium Temp. Area - -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
210	CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD
310	FUSLG TAIL SECTION AFT OF AFT PRESS BHD
312AR

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
3	WASHER	AIPC 27-44-04-03-480

E. Referenced Information

REFERENCE	DESIGNATION
TASK 20-28-00-912-802-A	Electrical Bonding - General Maintenance Procedure
TASK 20-28-00-912-803-A	Bonding Surface Preparation
TASK 27-44-51-710-802-A	Operational Check of THS Actuator Electrical Load Sensing Device
TASK 29-00-00-864-001-A	Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action
Electrical Load Sensing Device (ELSD)
Electrical Load Sensing Device (ELSD) ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 27-44-51-860-072-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Make sure that the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE is in position below the access door 312AR.
(2) Make sure that the access door 312AR is open.
(3) Make sure that the 98D27403500000 PITCH TRIM CONTROL LOCKING is installed on the pitch-trim control wheel.
(4) Make sure that the WARNING NOTICE(S) are in position in the cockpit to tell persons not to operate the pitch controls.
(5) Make sure that the hydraulic systems are depressurized and put them in the maintenance configuration
(Ref. AMM TASK 29-00-00-864-001).
(6) Make sure that the warning notices are in position to tell persons not to pressurize the Green, the Yellow and the Blue hydraulic systems:

in the cockpit on the hydraulic section 40VU of the overhead panel,
on the ground service panels of the Green, the Yellow and the Blue hydraulic systems.

Subtask 27-44-51-865-072-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	FLIGHT CONTROLS/ELAC1/NORM/SPLY	15CE1	B11
49VU	FLIGHT CONTROLS/THS/ACTR/MOT2	19CE2	B09
** ON A/C NOT FOR ALL
49VU	FLIGHT CONTROLS/ELAC1/NORM/SPLY	15CE1	B06
49VU	FLIGHT CONTROLS/THS/ACTR/MOT2	19CE2	B04
** ON A/C ALL
105VU	FLT CTL/ELAC1/STBY SPLY	16CE1	A01
121VU	FLIGHT CONTROLS/THS ACTR/MOT3	19CE3	Q17
121VU	FLIGHT CONTROLS/THS ACTR/MOT1	19CE1	Q16
** ON A/C NOT FOR ALL
121VU	THS ACTR/ELSD	95CE	Q15
** ON A/C NOT FOR ALL
121VU	THS ACTR/ELSD	95CE	P15

4. Procedure
Subtask 27-44-51-420-056-A

A. Installation of the Electrical Load Sensing Device (ELSD)
(1) Clean the component interfaces and the adjacent area.
(2) Do an inspection of the component interfaces and the adjacent area.
(3) Prepare the surface of the bonding point(s)
(Ref. AMM TASK 20-28-00-912-803).
(4) Put the bushes (14) on the axes of the ELSD (11).
(5) Apply Non Hardening Jointing Putty-Medium Temp. Area - - (Material No.06LCG9) on the outside diameter of the bushes (14).
(6) Make sure that the O-rings (6) are in the correct condition and in the correct position on the axes of the ELSD (11).
(7) Carefully connect the ELSD (11) with the bushes (14) to the secondary upper attachment (5) and the structure lug (1).
(8) Install the spring boxes (4), the new AIPC 27-44-04-03-480 WASHER (3) and the nuts (2) on the axes of the ELSD (11).
(9) TORQUE the nuts (2) to between 5 and 4 m.N (44.25 and 35.40 lbf.in )

.
(10) To safety the nuts (2), bend two adjacent teeth together with their two opposite adjacent teeth on each locking washer (3).
(11) Install the bonding strap (10):
(a) Install the bolt (9), the lanyard of protective cap EN3645-F3B0 (8) and the bonding strap (10) through the hole of the ELSD (11).
(b) Install the washer (12) and the nut (13) on the bolt (9).
(c) Tighten the nut (13).
(12) Do the electrical resistance measurement and the final protection of the bonding point(s)
(Ref. AMM TASK 20-28-00-912-802).
(13) Make sure that protective cap EN3645-F3B0 (8) and the test plug (7) are correctly installed.

Subtask 27-44-51-420-056-B ** ON A/C NOT FOR ALL

.
(10) To safety the nuts (2), bend two adjacent teeth together with their two opposite adjacent teeth on each locking washer (3).
(11) Install the bonding strap (10):
(a) Install the bolt (9) and the bonding strap (10) through the hole of the ELSD (11).
(b) Install the washer (12) and the nut (13) on the bolt (9).
(c) Tighten the nut (13).
(12) Do the electrical resistance measurement and the final protection of the bonding point(s)
(Ref. AMM TASK 20-28-00-912-802).
(13) Connect the electrical connector (8):
(a) Remove the CAP - BLANKING from each disconnected electrical connector and receptacle.
(b) Make sure that all the electrical connections are clean and in the correct condition.
(c) Connect the electrical connector (8) to the ELSD (11).
(14) Make sure that the test plug (7) is correctly installed.

Subtask 27-44-51-865-073-A ** ON A/C NOT FOR ALL

B. 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	FLIGHT CONTROLS/ELAC1/NORM/SPLY	15CE1	B11
49VU	FLIGHT CONTROLS/THS/ACTR/MOT2	19CE2	B09
** ON A/C NOT FOR ALL
49VU	FLIGHT CONTROLS/ELAC1/NORM/SPLY	15CE1	B06
49VU	FLIGHT CONTROLS/THS/ACTR/MOT2	19CE2	B04
** ON A/C ALL
105VU	FLT CTL/ELAC1/STBY SPLY	16CE1	A01
121VU	FLIGHT CONTROLS/THS ACTR/MOT3	19CE3	Q17
121VU	FLIGHT CONTROLS/THS ACTR/MOT1	19CE1	Q16
** ON A/C NOT FOR ALL
121VU	THS ACTR/ELSD	95CE	Q15
** ON A/C NOT FOR ALL
121VU	THS ACTR/ELSD	95CE	P15

Subtask 27-44-51-710-054-B ** ON A/C NOT FOR ALL

C. Test
(1) Do the operational check of THS actuator ELSD (Ref. AMM TASK 27-44-51-710-802).

Subtask 27-44-51-860-073-A ** ON A/C NOT FOR ALL

D. Aircraft Maintenance Configuration
(1) Remove the 98D27403500000 PITCH TRIM CONTROL LOCKING from the pitch-trim control wheel in the flight compartment.
(2) Remove the WARNING NOTICE(S).

5. Close-up
Subtask 27-44-51-410-067-A ** ON A/C NOT FOR ALL

A. 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.

[Rev.10 from 2021] 2026.04.01 06:54:13 UTC