Oil Replenishment of the THS Actuator

TASK 12-13-27-612-001-A
Oil Replenishment of the THS Actuator

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: 310
FIN: 9CE

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	MAT - PROTECTIVE
No specific	AR	SAFETY BARRIER(S)
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 1.6 and 1.4 m.daN (11.80 and 10.32 lbf.ft )
0U145506	1	CONE-MOUNTING, THS ACTUATOR
0U190363	1	TOOL-OIL FILLING,THS ACTUATOR

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.03ABB1)	Synthetic base Lubricating Oil-Turbine Engine Low Temp. -
(Material No.14QEB1)	Wire-Locking Dia: 0.6 mm CRES Nickel Alloy -
(Material No.14SBA1)	Textile-Lint free Cotton -

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
2	O-RING	AIPC 27-44-51-02-100

E. Referenced Information

REFERENCE	DESIGNATION
TASK 27-44-51-610-001-A	Drain and Refill the THS Actuator Gearbox
TASK 29-10-00-864-001-A	Depressurize the Green Hydraulic System
TASK 29-10-00-864-002-A	Depressurize the Yellow Hydraulic System
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 29-23-00-863-002-A	Pressurize the Yellow Hydraulic System from the Green Hydraulic System through the PTU with the Ground Service Cart
THS Actuator

3. Job Set-up
Subtask 12-13-27-941-052-A

A. Safety Precautions
(1) Put the SAFETY BARRIER(S) in position.

Subtask 12-13-27-860-051-A

B. Aircraft Maintenance Configuration
(1) Pressurize the Green and Yellow hydraulic systems (Ref. AMM TASK 29-23-00-863-001) and (Ref. AMM TASK 29-23-00-863-002).
(2) On the center pedestal:
(a) Turn the pitch-trim control wheel to move the Trimmable Horizontal Stabilizer (THS) more than three times from the fully up position to the fully down position.
(b) Turn the pitch-trim control wheel to move the THS to the "0" position.
(3) Depressurize the Green and Yellow hydraulic systems
(Ref. AMM TASK 29-10-00-864-001) and (Ref. AMM TASK 29-10-00-864-002).
(4) Put the WARNING NOTICE(S) in position in the cockpit to tell persons not to pressurize the Green and Yellow hydraulic systems.
(5) Put the WARNING NOTICE(S) in position in the cockpit to tell persons not to operate the THS.
(6) On the tail cone, make sure that the THS is in front of the "0" mark.
(7) Make sure that the aircraft is in the horizontal position.

Subtask 12-13-27-865-051-A

C. Open, safety and tag 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

Subtask 12-13-27-010-053-A

D. Get Access
(1) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position below zone 310.
(2) Open access door 312AR.
(3) Put the MAT - PROTECTIVE in position in the THS actuator area to prevent damage to the structure.

4. Procedure
Subtask 12-13-27-612-050-A

A. Oil Replenishment of the Trimmable Horizontal Stabilizer (THS) Actuator Gearbox
(1) Remove the cap (4) from the oil fill plug (3).
(2) Make sure that the inner strainer in the oil fill plug (3) is in the correct condition.

CAUTION: ONLY USE AN OIL FILLING TOOL THAT HAS A TRANSPARENT HOSE AND A FUNNEL. IF YOU DO NOT OBEY THIS INSTRUCTION, DETERIORATION OF THE STRAINER IN THE OIL FILL PLUG CAN OCCUR.

(3) Install the 0U190363 TOOL-OIL FILLING,THS ACTUATOR on the oil fill plug (3).

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.

(4) If you drained the THS actuator gearbox, cut and discard the lockwire from the plug (1).
(5) Remove the plug (1) and the O-ring (2). Discard the O-ring (2).
(6) Do the check of the oil level of the THS actuator gearbox approximately one hour after the last movement of the THS actuator.

NOTE: This time is necessary for the level of the oil to become stable.

(7) Monitor the oil level indicator (5) and fill the THS actuator gearbox with the Synthetic base Lubricating Oil-Turbine Engine Low Temp. - (Material No.03ABB1) , until the oil level is correct:
(a) If the ambient air temperature is less than 10 deg.C (50 deg.F), we recommend that you fill the THS actuator gearbox to a level of 1.5 mm (0.0591 in.) below the maximum mark.
(b) If the ambient air temperature is between 10 deg.C (50 deg.F) and 30 deg.C (86 deg.F), we recommend that you fill the THS actuator gearbox to the maximum mark.
(c) If the ambient air temperature is more than 30 deg.C (86 deg.F), we recommend that you fill the THS actuator gearbox to a level of 1.5 mm (0.0591 in.) above the maximum mark.
(d) If there is too much oil in the THS actuator gearbox, drain the oil until the oil level is correct in relation to the ambient air temperature (Ref. AMM TASK 27-44-51-610-001).
(8) Remove the 0U190363 TOOL-OIL FILLING,THS ACTUATOR.
(9) Clean the cap (4) with a Textile-Lint free Cotton - (Material No.14SBA1) .
(10) Install the cap (4).
(11) If you removed the plug (1), do the steps that follow:
(a) Make sure that the plug (1) and the plug interface are clean.
(b) Apply the Synthetic base Lubricating Oil-Turbine Engine Low Temp. - (Material No.03ABB1) on the new AIPC 27-44-51-02-100 O-RING (2).
(c) Install the new O-ring (2) on the plug (1) with the 0U145506 CONE-MOUNTING, THS ACTUATOR.
(d) Install the plug (1) on the THS actuator.
(e) TORQUE the plug (1) to between 1.6 and 1.4 m.daN (11.80 and 10.32 lbf.ft )

(f) Safety the plug (1) with the 14QEB1Wire-Locking Dia: 0.6 mm CRES Nickel Alloy -.

5. Close-up
Subtask 12-13-27-410-052-A

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

Subtask 12-13-27-865-052-A

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

Subtask 12-13-27-942-051-A

C. Removal of Equipment
(1) Remove the safety barriers.
(2) Remove the WARNING NOTICE(S).
(3) Remove the ground support and maintenance equipment, the special and standard tools and all other items.

[Rev.10 from 2021] 2026.04.01 06:54:17 UTC