(2) Clean and dry the pressure switch :
WARNING : BEFORE THE USE OF SOLVENT, PROTECTIVE FILM OR SEALANT
_______ CAREFULLY READ THE APPLICABLE "MATERIAL SAFETY DATA SHEET" AND FOLLOW ALL LISTED SAFETY AND HEALTH PRECAUTIONS. USE THESE PRODUCTS IN AN AREA OPENED TO THE AIR AND WEAR PROTECTION GLOVES. THESE PRODUCTS ARE FLAMMABLE AND VAPOR IS DANGEROUS. THEY MAY CAUSE IRRITATION OF EYES, NOSE, THROAT AND SKIN. HIGH CONCENTRATIONS MAY CAUSE WEAKNESS, HEADACHE, NAUSEA, DIZZINESS AND IMPAIRED JUDGEMENT.
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R (a) Clean and dry the pressure switch with acetone (Material No. R CP1039) or stoddard solvent (Material No. CP2011) or ardrox 552 R (Material No. CP2559) or turco ind 79 (Material No. CP2560) or R mag-chem teksol (Material No. CP2566) or degreasol 99 R (Material R No. CP2584) or mag-chem skysol (Material No. CP2656) or isopropyl R alcohol (Material No. CP1041) and dry compressed air.
(3) Lubricate the new preformed packing (10) with thrust reverser hydraulic fluid.
(4) Install the preformed packing (10) and a new backup ring (20) on the pressure switch.
(5) Install the pressure switch : CAUTION : MAKE SURE THERE IS NO UNWANTED MATERIAL IN THE PORTS AND
_______
ORIFICES OR DAMAGE CAN OCCUR.
(a) Put the pressure switch on the HCU.
(6) Apply mastinox 6856H (Material No. CP2317) on the three bolts.
(7) attach the pressure switch with the bolts.
(8) TORQUE the bolts to between 13 and 17 lbf.in (0.14 and 0.19 m.daN)
(9) Safety the bolts with lockwire 0.032 in. (0.8 mm) dia (Material No. CP8001) or lockwire 0.032 in. (0.8 mm) dia (Material No. CP8002).
(10) Apply sealant, polysulfide, fillet consistency (Material No. CP2428) around the mating joint of the HCU and the pressure switch and on the bolt heads.
(11) Connect the pylon electrical harness to the pressure switch .
(12) Tighten the connector with the softnose pliers.
5. Close-up
________
Subtask 78-31-16-440-050
A. Make the thrust reverser serviceable (Ref. TASK 78-30-00-081-041).
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B. Pressurization of the Hydraulic Reservoirs
(1) For engine 1 pressurize the Green hydraulic reservoir (Ref. TASK 29-14-00-614-002).
(2) For engine 2 pressurize the Yellow hydraulic reservoir (Ref. TASK 29-14-00-614-002).
Subtask 78-31-16-410-050
C. Close Access
(1) Make sure that the work area is clean and clear of tool(s) and other items.
(2) Close the fan cowl doors: (Ref. TASK 71-13-00-410-040)
FOR 1000EM1
437AL, 438AR
FOR 1000EM2
447AL, 448AR
(3) Remove the warning notice(s).
(4) Remove the access platform(s). Subtask 78-31-16-710-050
D. Bleed the air from the thrust-reverser hydraulic system. (Ref. TASK 78-30-00-710-040)
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____________________________________________________________________
TASK 78-31-16-210-041
Detailed Visual Inspection of the Hydraulic Contol Unit Pressure Switches
1. Reason for the Job
__________________
Self Explanatory
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION
-------------------------------------------------------------------------------
No specific warning notice
No specific access platform 1 m (3 ft. 3 in.)
B. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
71-13-00-010-040 Opening of the Fan Cowl Doors 71-13-00-410-040 Closing of the Fan Cowl Doors 78-30-00-081-041 Make the Thrust Reverser Serviceable after
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