Inspection-Trimmable Horizontal Stabilizer Leading Edge

TASK 55-12-11-200-001-A
Inspection-Trimmable Horizontal Stabilizer Leading Edge

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: YOU MUST PUT ON AND ATTACH A SAFETY HARNESS BEFORE YOU START WORK:

ON THE THS OR IN THE REAR FUSELAGE
ON TOP OF THE WINGS OR PYLONS.

WITHOUT A SAFETY HARNESS, YOU CAN FALL. THIS CAN KILL YOU OR CAUSE YOU INJURY.

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.

CAUTION: DO NOT CAUSE DAMAGE TO THE SURFACES. THE COMPONENTS ARE MADE OF CARBONFIBER REINFORCED PLASTIC.

ZONE: 330
ZONE: 340

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	ACCESS PLATFORM 4M (13 FT)
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	WARNING NOTICE(S)
98D27903500000	2	PIN-SIDE STICK LOCKING

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
330	THS LH AND LH ELEVATOR
340	THS RH AND RH ELEVATOR

C. Referenced Information

REFERENCE	DESIGNATION
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 29-10-00-864-003-A	Depressurize the Blue Hydraulic System
SRM 551200
Inspection Area of the Horizontal Stabilizer Leading-Edge

3. Job Set-up
Subtask 55-12-11-860-051-A

A. Depressurize Hydraulic Systems
(1) Depressurize the Green,Yellow, and Blue hydraulic systems (Ref. AMM TASK 29-10-00-864-001) (Ref. AMM TASK 29-10-00-864-002) (Ref. AMM TASK 29-10-00-864-003).

Subtask 55-12-11-865-054-A

B. Open, safety and tag this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	FLIGHT CONTROLS/THS/ACTR/MOT2	19CE2	B09
** ON A/C NOT FOR ALL
49VU	FLIGHT CONTROLS/THS/ACTR/MOT2	19CE2	B04
** ON A/C ALL
121VU	FLIGHT CONTROLS/THS ACTR/MOT3	19CE3	Q17
121VU	FLIGHT CONTROLS/THS ACTR/MOT1	19CE1	Q16

Subtask 55-12-11-481-051-A

C. Install Locking Devices
(1) Install the 98D27903500000 PIN-SIDE STICK LOCKING in the CAPT and F/O side stick controllers.

Subtask 55-12-11-941-051-A

D. Safety Precautions
(1) Put the WARNING NOTICE(S) in the flight compartment to tell persons not to operate the flight controls
(2) Put the WARNING NOTICE(S) in position to tell persons not to operate the hydraulic systems.
(3) Put the ACCESS PLATFORM 4M (13 FT) in position at zone 334 for the left hand trimmable horizontal stabilizer leading edge and/or zone 344 for the right hand trimmable horizontal stabilizer leading edge.

4. Procedure
Subtask 55-12-11-210-051-B

A. Visual Inspection
(1) Examine the leading edge sections to make sure that:

There is no distortion.
There are no loose screws.
There is no damage on the stainless-steel anti-erosion covers.
There is no damage on the paint finish.

(2) If you find damage, make sure that the damage is in the limits given in SRM 551200.

5. Close-up
Subtask 55-12-11-410-051-A

A. Visual Inspection
(1) Make sure that the work area is clean and clear of tools and other items.

Subtask 55-12-11-942-054-A

B. Remove Ground Equipment
(1) Remove the WARNING NOTICE(S).
(2) Remove the access platform(s).

Subtask 55-12-11-081-051-A

C. Remove Locking Devices
(1) Remove the 98D27903500000 PIN-SIDE STICK LOCKING from the CAPT and F/O side stick controllers.

Subtask 55-12-11-865-055-A

D. 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/THS/ACTR/MOT2	19CE2	B09
** ON A/C NOT FOR ALL
49VU	FLIGHT CONTROLS/THS/ACTR/MOT2	19CE2	B04
** ON A/C ALL
121VU	FLIGHT CONTROLS/THS ACTR/MOT3	19CE3	Q17
121VU	FLIGHT CONTROLS/THS ACTR/MOT1	19CE1	Q16

[Rev.10 from 2021] 2026.04.01 02:04:47 UTC