Removal of the Blue Hydraulic Reservoir

TASK 29-12-41-000-001-A
Removal of the Blue Hydraulic Reservoir

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.

FIN: 2000GQ

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	CAP - BLANKING
No specific	1	CONTAINER 5 L (1.32 USGAL)
No specific	AR	PLUG - BLANKING
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	2	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
197EB, 197FB

C. Referenced Information

REFERENCE	DESIGNATION
TASK 29-00-00-864-001-A	Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action
TASK 29-00-00-910-002-A	Safety Procedures of the Hydraulic System
TASK 29-10-00-680-003-A	Drainage of the Reservoir of the Blue Hydraulic System
TASK 29-14-00-614-001-A	Depressurization of the Hydraulic Reservoirs
Reservoir of the Blue Hydraulic System
Reservoir of the Blue Hydraulic System ** ON A/C NOT FOR ALL
Reservoir of the Blue Hydraulic System ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 29-12-41-865-050-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	HYD/HYD PWR/B WARN/& CTL	2702GJ	C12
121VU	HYDRAULIC/LOW/LVL/IND	1832GQ	N32
121VU	HYDRAULIC/HYD/QTY/IND	1831GQ	P35
123VU	B HYD/ELEC PUMP	2701GJ	AB09

Subtask 29-12-41-860-050-A

B. Aircraft Maintenance Configuration

WARNING: OBEY THE HYDRAULIC SAFETY PROCEDURES.

(1) Obey the hydraulic safety procedures (Ref. AMM TASK 29-00-00-910-002).
(2) Put the WARNING NOTICE(S) in position to tell persons not to pressurize the Blue hydraulic system:

in the cockpit on the hydraulic section 40VU of the overhead panel,
on the ground service panel of the Blue hydraulic system.

(3) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position at the access door 197EB.
(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) Depressurize the reservoir of the Blue hydraulic system (Ref. AMM TASK 29-14-00-614-001).
(6) Drain the reservoir of the Blue hydraulic system (Ref. AMM TASK 29-10-00-680-003).
(7) Put a CONTAINER 5 L (1.32 USGAL) below the reservoir.

Subtask 29-12-41-010-050-A

C. Open the access doors 197EB 197FB.

4. Procedure
Subtask 29-12-41-020-054-C ** ON A/C NOT FOR ALL

A. Removal of the Reservoir

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) Disconnect the electrical connectors (52),(49),(21),(28).
(2) Install a CAP - BLANKING on the electrical connectors and on the electrical receptacles on the reservoir (19).
(3) Remove the nut (20), the bolt (15) and the washer (18) and disconnect the bonding jumpers (16),(17) from the reservoir (19).
(4) Loosen the pipe end-fitting (25) and disconnect the air pipe (24) from the union (26).
(5) Loosen the pipe end-fitting (2) and disconnect the air bleed pipe (1) from the reducer (3).
(6) Loosen the pipe end-fitting (13) and disconnect the seal drain connection (14) from the pressure relief valve (12).
(7) Loosen the pipe end-fitting (43) and disconnect the suction pipe (44) from the reservoir (19).
(8) Loosen the pipe end-fitting (45) and disconnect the suction pipe (44) from the T-piece (46).
(9) Remove the suction pipe (44).
(10) Loosen the pipe end-fitting (42) and disconnect the return pipe (41) from the reservoir (19).
(11) Loosen the pipe end-fitting (40) and disconnect the return pipe (41) at the filter (2002GM).
(12) Remove the return pipe (41) from the aircraft.
(13) Loosen the pipe end-fitting (48) and disconnect the drain pipe (47) from the reservoir (19).
(14) Cut and remove the lockwire from the two strap bolts (51).
(15) Hold the reservoir (19) and loosen the two reservoir strap bolts (51).
(16) Disconnect the ends of the reservoir straps (50) and remove the reservoir (19) from the aircraft.
(17) Install a PLUG - BLANKING in all open pipe ends, the union (26), the tee-fitting (5) and in the reservoir ports.

Subtask 29-12-41-020-054-D ** ON A/C NOT FOR ALL

A. Removal of the Reservoir

(1) Disconnect the electrical connectors (52),(49),(21).
(2) Install a CAP - BLANKING on the electrical connectors and on the electrical receptacles on the reservoir (19).
(3) Remove the nut (20), the bolt (15) and the washer (18) and disconnect the bonding jumpers (16),(17) from the reservoir (19).
(4) Loosen the pipe end-fitting (25) and disconnect the air pipe (24) from the union (26).
(5) Loosen the pipe end-fitting (2) and disconnect the air bleed pipe (1) from the reducer (3).
(6) Loosen the pipe end-fitting (13) and disconnect the seal drain connection (14) from the pressure relief valve (12).
(7) Loosen the pipe end-fitting (43) and disconnect the suction pipe (44) from the reservoir (19).
(8) Loosen the pipe end-fitting (45) and disconnect the suction pipe (44) from the T-piece (46).
(9) Remove the suction pipe (44).
(10) Loosen the pipe end-fitting (42) and disconnect the return pipe (41) from the reservoir (19).
(11) Loosen the pipe end-fitting (40) and disconnect the return pipe (41) at the filter (2002GM).
(12) Remove the return pipe (41) from the aircraft.
(13) Loosen the pipe end-fitting (48) and disconnect the drain pipe (47) from the reservoir (19).
(14) Cut and remove the lockwire from the two strap bolts (51).
(15) Hold the reservoir (19) and loosen the two reservoir strap bolts (51).
(16) Disconnect the ends of the reservoir straps (50) and remove the reservoir (19) from the aircraft.
(17) Install a PLUG - BLANKING in all open pipe ends, the union (26), the tee-fitting (5) and in the reservoir ports.

[Rev.10 from 2021] 2026.04.01 00:19:20 UTC