Yellow Hydraulic System Low Pressure/Overheat Caused by User System Fault

TASK 29-13-00-810-819-A
Yellow Hydraulic System Low Pressure/Overheat Caused by User System Fault

1. Possible Causes

user system component internal leak

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
TSM TASK 29-13-00-810-802-A	Overheat Indication of the Yellow Hydraulic System
TSM TASK 29-13-00-810-805-A	Loss of the System Pressure of the Yellow Hydraulic System

3. Fault Confirmation
Subtask 29-13-00-700-050-A

A. Test
(1) If there are overheat and or low pressure indications:
(a) Do the Fault Isolation.

NOTE: A low pressure or overheat indication can be caused by a user system component internal leak .

4. Fault Isolation
Subtask 29-13-00-810-075-A

A. Procedure
(1) Make sure that all the user systems of the Yellow HYD system that follow have no defects:

LH and RH Spoilers 4
LH and RH Spoilers 2
RH Elevator
THS
LH Flaps Wing Tip Brake
Rudder
Yaw Damper
Reverse Eng 2
Cargo Doors
Alternate Brakes
Flaps.

(2) If all the user systems are serviceable:
(a) Do the procedures for the Yellow HYD system Low Pressure and Overheat, (Ref. TSM TASK 29-13-00-810-805) and (Ref. TSM TASK 29-13-00-810-802).
(3) If the aircraft is on a remote site and the necessary metering equipment is not available, do the procedures as far as possible:
(a) Examine the user system components for unusual increase in noise and temperature.
(b) Replace a system component that shows an unusual increase in noise and temperature.
(4) Do the applicable test in Para. 3. A. of (Ref. TSM TASK 29-13-00-810-802) and (Ref. TSM TASK 29-13-00-810-805).

5. Close-up
Subtask 29-13-00-942-050-A

A. Put the aircraft back to the serviceable condition.

[Rev.8 from Aug 2018] 2026.04.04 04:29:27 UTC