Remove Complete THSA for No Back Brake (NBB) Carbon Disks Discard and Replace with Serviceable THSA Unit

TASK 27-44-51-960-802-A
Remove Complete THSA for No Back Brake (NBB) Carbon Disks Discard and Replace with Serviceable THSA Unit

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: 310
FIN: 9CE

1. Reason for the Job
Refer to the MPD TASK: 274451-15
REMOVE COMPLETE THSA FOR NO BACK BRAKE (NBB) CARBON DISKS DISCARD AND REPLACE WITH SERVICEABLE THSA UNIT.
2. Job Set-up Information
A. Work Zones and Access Panels

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

B. Referenced Information

REFERENCE	DESIGNATION
TASK 27-44-51-000-001-A	Removal of the Trimmable Horizontal Stabilizer (THS) Actuator
TASK 27-44-51-400-001-A	Installation of the Trimmable Horizontal Stabilizer (THS) Actuator

3. Job Set-up
Subtask 27-44-51-860-077-A

A. Aircraft Maintenance Configuration
(1) Refer to the next Para. to get all information to replace the THSA.

4. Procedure
Subtask 27-44-51-960-050-A

A. Replacement of the THSA
(1) Remove the THSA (Ref. AMM TASK 27-44-51-000-001).
(2) Send the THSA to the workshop.

The NBB carbon disks replacement can be done in accordance with VSB 47145-27-17.

(3) Install the serviceable THSA (Ref. AMM TASK 27-44-51-400-001).

[Rev.10 from 2021] 2026.03.31 23:51:22 UTC