(a) Put a warning notice to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
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(3) On the overhead maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a warning notice to tell persons not to energize the FADEC 1(2).
Subtask 79-34-15-010-050
B. Open the fan cowl doors (Ref. TASK 71-13-00-010-040):
FOR 1000EM1
437AL, 438AR
FOR 1000EM2
447AL, 448AR
4. Procedure
_________
(Ref. Fig. 401/TASK 79-34-15-991-300)
Subtask 79-34-15-020-050
A. Removal of the Low Oil Pressure Switch
(1) Cut and remove the safetywire from the insulation housing (15). Remove the housing from the low oil pressure switch (25).
(2) Cut and remove the safetywire from the Low Pressure (LP) bootie (5) and the High Pressure (HP) bootie (10). Remove the booties from the tubes.
(3) Disconnect the electrical connector 4000ENA from the pressure switch (25).
(4) Put a container below the pressure switch (25) to collect the drained oil.
(5) Disconnect the tubes from the unions (40) in the pressure switch (25).
(6) Remove the bolts (35) and the washers (30) that attach the pressure switch (25) to the bracket.
(7) Remove the pressure switch (25) and the thermo barrier (20) from the engine.
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Low Oil Pressure Switch
Figure 401/TASK 79-34-15-991-300
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(8) Remove the unions (40) and packings (45) from the pressure switch (25). Discard the packings.
(9) Put protective covers on the pressure switch, the tubes and the unions.
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Installation of the Low Oil Pressure Switch (4000EN)
1. Reason for the Job
__________________
Self Explanatory
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific lint-free cloth No specific ohmmeter No specific warning notice No specific Torque Wrench : range 32 to 36 lbf.in
(0.36 to 0.40 m.daN) No specific Torque Wrench : range 36.00 to 220.00 lbf.in
(0.40 to 2.60 m.daN)
B. Consumable Materials
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
No specific primer SS-4004 No specific silicone sealant DC 90-006 No specific silicone sealant RTV-88 Material No. CP1008 *
trichloroethylene (Ref. 70-30-00) Material No. CP2244 * primer (DC 1200) (Ref. 70-30-00) Material No. CP2442 * engine oil (Ref. 70-30-00) Material No. CP8001 * lockwire 0.032 in. (0.8 mm) dia. (Ref. 70-30-00)
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C. Expendable Parts
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