Installation of the Air Pressure Switch (2387GH)
 1. Reason for the Job
__________________
 Self Explanatory
 2. Job Set-up Information
______________________
 A. Fixtures, Tools, Test and Support Equipment
 -------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific blanking caps No specific blanking plugs No specific warning notices No specific access platform 2.4 m (7 ft. 10 in.) No specific Torque Wrench : range 0.20 to 3.60 m.daN
 (2.00 to 26.00 lbf.ft)
 B. Consumable Materials
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
No specific  lockwire, corrosion resistant steel, dia. 0.8 mm
 (0.032 in.) Material No. 02-003 F NSA 307110 TYPE 4
 HYDRAULIC FLUID (PHOSPHATE ESTER BASE)
 (Ref. 20-31-00)
 Material No. 05-004  USA MIL-L-25567 TYPE I OXYGEN LEAK DETECTOR (Ref. 20-31-00)
 C. Expendable Parts
 -------------------------------------------------------------------------------FIG.ITEM |DESIGNATION |IPC-CSN -------------------------------------------------------------------------------
O-ring  29-34-04 01 -070
R 1EFF : 001-049, 051-061, 101-105, 201-203, 1 29-34-13Page 404 1 1 May 01/05 1 1 1CES 1

 D. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
29-00-00-864-001 Put the Related Hydraulic System in the Depressurized
 Configuration before Maintenance Action 29-14-00-614-001 Depressurization of the Hydraulic Reservoirs 29-14-00-614-002 Pressurization of the Hydraulic Reservoirs through
 the Ground Connector 29-34-00-710-002 Operational Check of Reservoir Low Air Pressure Warning
 3. Job Set-up
__________
 Subtask 29-34-13-860-051
 A. Aircraft Maintenance Configuration
 (1)
 Make sure that the warning notices are in position to tell persons not to pressurize the Blue hydraulic system:

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

 (2)
 Make sure that the Blue hydraulic system is depressurized and put it in the maintenance configuration. (Ref. TASK 29-00-00-864-001).

 (3)
 Make sure that the reservoir of the Blue hydraulic system is depressurized (Ref. TASK 29-14-00-614-001).

 (4)
 Make sure that the access platform is in position at the access door 197FB.

 (5)
 Make sure that the access door 197FB is open.

 Subtask 29-34-13-865-051
 B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged
 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------121VU HYDRAULIC/B RSVR/AIR/PRESS/XMTR 2386GH P34 123VU B HYD/ELEC PUMP 2701GJ AB09
R 1EFF : 001-049, 051-061, 101-105, 201-203, 1 29-34-13Page 405 1 1 May 01/05 1 1 1CES 1

 4. Procedure
_________ Subtask 29-34-13-420-050
 A. Installation of the Air Pressure Switch
 (1)
 Clean the component interface and/or the adjacent area.

 (2)
 Do an inspection of the component interface and/or the adjacent area.

 (3)
 Remove the blanking plugs from the pressure switch and the port of the tee-fitting (4).

 (4)
 Apply HYDRAULIC FLUIDS (Material No. 02-003) to the O-ring (3).

 (5)
 Install the O-ring (3) on the pressure switch (2).

 (6)
 Install the pressure switch (2) on the reservoir and TORQUE the pressure switch (2) to between 1.21 and 1.32 m.daN (107.07 and 116.81 lbf.in).

 (7)
 Safety the pressure switch (2) with lockwire, corrosion resistant steel, dia. 0.8 mm (0.032 in.).

 (8)
 Remove the blanking caps from the electrical connector (1) and the pressure switch (2).

 (9)
 Make sure that the electrical connectors are clean and in the correct condition.

 (10)
 Connect the electrical connector (1) and the pressure switch (2). Subtask 29-34-13-790-051

 B.
 Leak Test of the Hydraulic Connections

 (1)
 Pressurize the reservoir of the Blue hydraulic system (Ref. TASK 29-14-00-614-002).
　
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