Fault of the Hydraulic Reservoir Pressurizing System

TASK 29-14-00-810-801-A
Fault of the Hydraulic Reservoir Pressurizing System

1. Possible Causes

air filter element
outlet non-return valve
RSVR PRESS UNIT [1360GM]

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 29-00-00-864-001	Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action
AMM 29-14-00-614-002	Pressurization of the Hydraulic Reservoirs through the Ground Connector
AMM 29-14-00-720-001	Functional Test of the Pressurizing System of the Hydraulic Reservoirs
AMM 29-14-41-000-002	Removal of the Reservoir Pressurization Unit
AMM 29-14-41-000-003	Removal of the Outlet Non-Return Valve of the Reservoir Pressurization Unit
AMM 29-14-41-400-002	Installation of the Reservoir Pressurization Unit
AMM 29-14-41-400-003	Installation of the Outlet Non-Return Valve of the Reservoir Pressurization Unit
AMM 29-14-41-610-002	Servicing of the Reservoir Pressurization Filter

3. Fault Confirmation
Subtask 29-14-00-860-050-A

A. Aircraft Maintenance Configuration
(1) Make sure that the hydraulic systems are depressurized and put them in the maintenance configuration.
AMM 29-00-00-864-001.
(2) Pressurize the hydraulic reservoirs through the ground connector AMM 29-14-00-614-002.
(3) Do a visual check of the pressure shown on the gages of the hydraulic reservoirs.

4. Fault Isolation
Subtask 29-14-00-810-050-A

A. If the fault confirmation gives:

No increase of the air pressure in all three reservoirs:

(1) Do a check of the clogging indicator on the reservoir pressurization unit (1360GM):
(a) If the clogging indicator is out:

Replace the air filter element of the reservoir pressurization unit 1360GM. AMM 29-14-41-610-002.

(2) If the clogging indicator is not out, or the fault continues:

Replace the outlet non-return valve of the reservoir pressurization unit 1360GM. AMM 29-14-41-000-003 and AMM 29-14-41-400-003.

(3) If the fault continues:

Replace the RSVR PRESS UNIT [1360GM] . AMM 29-14-41-000-002 and AMM 29-14-41-400-002.

5. Close-up
Subtask 29-14-00-720-050-A

A. Do the functional test of the pressurizing system of the hydraulic reservoirs to make sure that the operation is correct AMM 29-14-00-720-001.

[Rev.8 from Aug 2018] 2026.04.04 04:39:54 UTC