Removal of the Lower Claw Stop

TASK 27-44-51-000-003-A
Removal of the Lower Claw Stop

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

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	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	WARNING NOTICE(S)
0U145409	1	SPECIAL WRENCH
0U145920	1	TOOL-MANUAL CRANKING STOP,THS ACTUATOR
0U190360	1	PIN-RIGGING,THS ACTUATOR,MECHANICAL INPUT LEVER
0U190844	2	TOOL-RELEASE,POB
98D27403500000	1	PITCH TRIM CONTROL LOCKING

B. Work Zones and Access Panels

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

C. Referenced Information

REFERENCE	DESIGNATION
TASK 27-44-51-710-001-A	Operational Check of THS Actuator No-Back Device
TASK 29-00-00-864-001-A	Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action
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
Job Set-Up
Lower Claw Stop without Brake Nut
Lower Claw Stop with Brake Nut

3. Job Set-up
Subtask 27-44-51-010-062-A

A. Get Access
(1) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position.
(2) Open the access door 312AR.

Subtask 27-44-51-860-057-A

B. Aircraft Maintenance Configuration

Job Set-Up

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.

(1) Pressurize the Green and the Yellow hydraulic systems (Ref. AMM TASK 29-23-00-863-001) and (Ref. AMM TASK 29-23-00-863-002).
(2) Turn the pitch-trim control wheel in the flight compartment and put the THS actuator to the zero position.
(3) Depressurize the Green and Yellow hydraulic systems and put them in the maintenance configuration (Ref. AMM TASK 29-00-00-864-001).
(4) Make sure that the Blue hydraulic system is depressurized and put it in the maintenance configuration.
(Ref. AMM TASK 29-00-00-864-001).
(5) Put the WARNING NOTICE(S) 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.

(6) If hydraulic pressure is not available, use the manual drive input and move the THS actuator to the zero position.
(a) Put the 0U145920 TOOL-MANUAL CRANKING STOP,THS ACTUATOR in position on the screw of the THS actuator.
(b) Use the 0U190844 TOOL-RELEASE,POB and a 1/2 inch socket to position the THS actuator (Ref. AMM TASK 27-44-51-710-001).
(7) Put the WARNING NOTICE(S) in the flight compartment to tell persons not to operate the pitch controls.
(8) Put the 0U190360 PIN-RIGGING,THS ACTUATOR,MECHANICAL INPUT LEVER in the mechanical input of the THS actuator.
(9) Put the 98D27403500000 PITCH TRIM CONTROL LOCKING on the pitch-trim control wheel in the flight compartment.

Subtask 27-44-51-865-057-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

4. Procedure
Subtask 27-44-51-020-053-A

A. Removal of the Lower Claw Stop without Brake Nut
(1) Make sure that there is a mark for the correct location of the claw stop (112) and the screw (110). If there is no mark use a marker to mark the keys (118) in relation to the claw stop (112) and to the screw (110).
(2) Release the tabwasher (116) and remove the nut (117) with the 0U145409 SPECIAL WRENCH.
(3) Remove the tabwasher (116) and the springwasher (115) from the fail safe tie-bar (111).
(4) Discard the tabwasher (116).

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.

(5) Remove and discard the lockwire:

Remove and discard the lockwire from the screws (114).

(6) Remove the screws (114), the washers (113) and the lower claw stop (112).
(7) If necessary, remove the two keys (118) with the studs (119).

Subtask 27-44-51-020-056-A

B. Removal of the Lower Claw Stop with Brake Nut
(1) Make sure that there is a mark for the correct location of the claw stop (112) and the screw (110). If there is no mark use a marker to mark the keys (118) in relation to the claw stop (112) and to the screw (110).
(2) Release the tabwasher (116) and remove the nut (117).
(3) Remove the tabwasher (116), the brake nut (121) and the springwasher (115) from the fail safe tie-bar (111).
(4) Discard the tabwasher (116).

(5) Remove and discard the lockwire:

Remove and discard the lockwire from the screws (114).

(6) Remove the screws (114), the washers (113) and the lower claw stop (112).
(7) If necessary, remove the two keys (118) with the studs (119).

[Rev.10 from 2021] 2026.04.01 06:54:36 UTC