L/G - MLG Shock Absorber Hydraulic Leakage

TASK 32-10-00-810-801-A
L/G - MLG Shock Absorber Hydraulic Leakage

1. Possible Causes

MLG lower gland seal

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 32-11-13-860-001	To Close the Spare-Seal Activating-Valve
AMM 32-11-13-860-802	MLG Shock Absorber Leak Rate Confirmation Check for Signs of Oil Leakage from the Interface between the Main Fitting and the Lower Bearing Gland Housing.....

3. Fault Confirmation
Subtask 32-10-00-710-050-A ** ON A/C NOT FOR ALL

A. Test
(1) A test is not necessary
(a) If there is a leak from the MLG shock absorber gland housing do the procedure in Para. 4.A.

Subtask 32-10-00-710-050-B ** ON A/C NOT FOR ALL

A. Test
(1) A test is necessary

NOTE: It is possible to see signs of oil leakage from the interface between the main fitting and the lower bearing gland housing (static seal area). The fluid loss in this condition is at a very low level but constant rate. It is possible to continue operation of the aircraft with minor oil loss from this area:

As the conditions detailed in the procedure that follows
Or
As per the instructions provided at aircraft delivery.

NOTE: A major loss of oil in the static seal area would not be consistent with the pre-existing minor oil loss condition.

(2) Clean the lower bearing area as follows:

Wipe clean the full circumference around the lower bearing/main fitting area. Wipe clean the sliding piston, torque links and slave links.

(3) Identify the location where leakage forms around the circumference of the lower bearing/main fitting area AMM 32-11-13-860-001. Do this for a 15 minute period.
(a) If there is a leak from the interface between the sliding tube and the lower bearing gland housing (dynamic seals interface):

Do Para 4.A. step (1).

(b) If there is a major leak from the interface between the lower bearing gland housing and the main fitting (static seals interface):

Do Para 4.A. step (1).

No sign of more leakage
Or
Signs of minor oil leakage from the interface between the main fitting and the lower bearing gland housing (static seals area), then do the steps that follow:

1 If there is no sign of drops of oil on the external face of the lower bearing gland housing after 15 minutes:

Do Para 4.A step (2) in less than 3 months.

2 If there is not more than 1 drop of oil on the external face of the lower bearing gland housing after 15 minutes:

Do Para 4.A step (2) in less than 10 days.

3 If there is more than 1 drop of oil on the external face of the lower bearing gland housing after 15 minutes:

Do Para 4.A step (2) and contact AIRBUS for more information.

4. Fault Isolation
Subtask 32-10-00-810-050-A ** ON A/C NOT FOR ALL

A. Procedure
(1) Isolate the MLG lower gland seal and activate the upper gland seal AMM 32-11-13-860-001

Subtask 32-10-00-810-050-B ** ON A/C NOT FOR ALL

A. Procedure
(1) Isolate the MLG lower gland seal and activate the upper gland seal AMM 32-11-13-860-001
(2) If signs of minor oil leakage is observed from the interface between the main fitting and the lower bearing gland housing (static seals area):

Do a MLG Shock Absorber Leak Rate Confirmation Check AMM 32-11-13-860-802.

[Rev.8 from Aug 2018] 2026.04.04 04:31:18 UTC