Removal of the Reservoir Pressurization Hose

TASK 29-14-49-000-001-A
Removal of the Reservoir Pressurization Hose

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: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE AFTER SHUTDOWN. THE ENGINE CAN STAY HOT FOR A LONG TIME. IF YOU DO NOT OBEY THIS INSTRUCTION, INJURY CAN OCCUR.

WARNING: YOU MUST NOT GET HYDRAULIC FLUID ON YOUR SKIN, IN YOUR EYES OR IN YOUR MOUTH. THE HYDRAULIC FLUID IS POISONOUS AND CAN BE ABSORBED INTO YOUR BODY. IF YOU ACCIDENTALLY GET HYDRAULIC FLUID IN YOUR EYES, MOUTH OR ON YOUR SKIN, FLUSH WITH WATER AND GET MEDICAL AID.

WARNING: OBEY THE HYDRAULIC SAFETY PROCEDURES.

ZONE: 470
FIN: 1674GM ** ON A/C NOT FOR ALL

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 2M (6 FT) - ADJUSTABLE
No specific	AR	PLUG - BLANKING
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
470	ENGINE 1 AFT PYLON
FOR [1000EM1] (ENGINE-1)
437AL, 451AL

C. Referenced Information

REFERENCE	DESIGNATION
TASK 29-10-00-864-003-A	Depressurize the Blue Hydraulic System
TASK 29-14-00-614-001-A	Depressurization of the Hydraulic Reservoirs
TASK 29-23-00-864-001-A	Depressurize the Green and Yellow Hydraulic Systems after Operation of the PTU
TASK 29-24-00-864-001-A	Depressurize the Yellow Hydraulic System
TASK 71-13-00-010-010-A	Opening of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 71-13-00-010-040-A	Opening of the Fan Cowl Doors
TASK 71-13-00-010-040-B	Opening of the Fan Cowl Doors
TASK 78-30-00-040-013-A	Deactivation of the Thrust Reverser System for Flight
TASK 78-30-00-481-041-A	Make the Thrust Reverser Unserviceable for Maintenance
TASK 78-30-00-481-041-B	Make the Thrust Reverser Unserviceable for Maintenance
TASK 78-32-00-010-010-A	Opening of the Thrust Reverser Halves
TASK 78-36-00-010-040-A	Opening of the Thrust Reverser Doors
TASK 78-36-00-010-040-B	Opening of the Thrust Reverser Doors
Reservoir Pressurization Hose
Reservoir Pressurization Hose ** ON A/C NOT FOR ALL
Reservoir Pressurization Hose ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 29-14-49-860-050-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Depressurize the aircraft hydraulic systems (Ref. AMM TASK 29-23-00-864-001), (Ref. AMM TASK 29-24-00-864-001) and (Ref. AMM TASK 29-10-00-864-003).
(2) Depressurize the hydraulic reservoir (Ref. AMM TASK 29-14-00-614-001).
(3) Put WARNING NOTICE(S) in position to tell persons not to pressurize the hydraulic system:

on the ground service panel 198CB.

(4) Put WARNING NOTICE(S) on the access door 195BB to tell persons not to pressurize the hydraulic reservoir.

Subtask 29-14-49-941-050-A ** ON A/C NOT FOR ALL

B. Safety Precautions
(1) On the center pedestal, on the ENG panel 115VU:

put WARNING NOTICE(S) to tell persons not to start the engine.

(2) Make sure that the engine 1 shutdown occurred not less than 5 minutes before you do this procedure.
(3) Put WARNING NOTICE(S) in position to tell persons not to pressurize the hydraulic system:

in the cockpit, on the HYD section of the overhead panel 40VU.

(4) On the overhead maintenance panel 50VU:

make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.

(5) Put WARNING NOTICE(S) to tell persons not to energize the FADEC 1(2).

Subtask 29-14-49-010-050-A ** ON A/C NOT FOR ALL

C. Get Access
(1) Open the left fan-cowl door (Ref. AMM TASK 71-13-00-010-040).
(a) FOR [1000EM1] (ENGINE-1)
437AL
(2) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position below the engine.

Subtask 29-14-49-040-052-A ** ON A/C NOT FOR ALL

D. Deactivation of the Thrust Reverser

WARNING: MAKE SURE THAT THE THRUST REVERSER HYDRAULIC CONTROL UNIT (HCU) IS DEACTIVATED BEFORE YOU DO WORK ON OR AROUND THE THRUST REVERSER. IF THE HCU IS NOT DEACTIVATED, THERE IS A RISK OF UNWANTED THRUST REVERSER OPERATION WHICH CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.

(1) Make the thrust reverser unserviceable for maintenance (Ref. AMM TASK 78-30-00-481-041).

Subtask 29-14-49-010-056-A ** ON A/C NOT FOR ALL

E. Get Access
(1) Open the thrust reverser door (Ref. AMM TASK 78-36-00-010-040).
(a) FOR [1000EM1] (ENGINE-1)
451AL

Subtask 29-14-49-010-050-B ** ON A/C NOT FOR ALL

F. Get Access
(1) Open the left fan-cowl door (Ref. AMM TASK 71-13-00-010-040).
(a) FOR [1000EM1] (ENGINE-1)
437AL
(2) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position below the engine.

Subtask 29-14-49-040-052-C ** ON A/C NOT FOR ALL

G. Deactivation of the Thrust Reverser

(1) Make the thrust reverser unserviceable for maintenance (Ref. AMM TASK 78-30-00-481-041).

Subtask 29-14-49-010-056-C ** ON A/C NOT FOR ALL

H. Get Access
(1) Open the thrust reverser door (Ref. AMM TASK 78-36-00-010-040).
(a) FOR [1000EM1] (ENGINE-1)
451AL

Subtask 29-14-49-010-050-C ** ON A/C NOT FOR ALL

I. Get Access
(1) Open the left fan-cowl door (Ref. AMM TASK 71-13-00-010-010).
(a) FOR [1000EM1] (ENGINE-1)
437AL
(2) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position below the engine.

Subtask 29-14-49-040-052-B ** ON A/C NOT FOR ALL

J. Deactivation of the Thrust Reverser

(1) Do the deactivation of the thrust reverser (Ref. AMM TASK 78-30-00-040-013).

Subtask 29-14-49-010-056-B ** ON A/C NOT FOR ALL

K. Get Access
(1) Open the thrust reverser halve (Ref. AMM TASK 78-32-00-010-010).
(a) FOR [1000EM1] (ENGINE-1)
451AL

4. Procedure
Subtask 29-14-49-020-050-A ** ON A/C NOT FOR ALL

A. Removal of the Reservoir Pressurization Hose

CAUTION: USE A SECOND WRENCH TO APPLY COUNTERTORQUE TO THE UNION WHEN YOU DISCONNECT/CONNECT HYDRAULIC LINES ON UNIONS. IF YOU DO NOT USE THE SECOND WRENCH, THERE IS A RISK THAT YOU WILL LOOSEN OR TIGHTEN THE UNION TOO MUCH.

(1) Loosen the nuts (2) and disconnect the reservoir pressurization hose (4).
(2) Put the PLUG-BLANKING in each disconnected line end.

Subtask 29-14-49-020-050-B

A. Removal of the Reservoir Pressurization Hose

(1) Loosen the nut of the restrictor elbow (5).
(2) Disconnect the restrictor elbow (5) from the junction plate (6).
(3) Hold the restrictor elbow (5) with the reservoir pressurization hose (3).
(4) Loosen the nut (2) that connects the reservoir pressurization hose (3) to the junction plate (1).
(5) Disconnect the reservoir pressurization hose (3) from the junction plate (1).
(6) Loosen the nut (4) that connects the reservoir pressurization hose (3) to the restrictor elbow (5).
(7) Disconnect the reservoir pressurization hose (3) from the restrictor elbow (5).
(8) Put the PLUG-BLANKING in each disconnected line end.

[Rev.10 from 2021] 2026.04.01 12:56:05 UTC