S 414-015
(4)
Install the APU power plant (AMM 49-11-00/401).
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DIFFERENTIAL AIR PRESSURE REGULATOR - SERVICING
_______________________________________________
1. General
_______
A. This procedure gives the task to clean the differential air pressure regulator filter (which is referred to as the 'pressure regulator filter').
TASK 49-52-21-103-001
2. Differential Air Pressure Regulator Filter Cleaning (Fig. 301)
___________________________________________________
A. Standard Tools and Equipment
(1) Air Source - Compressed Dry
B. Consumable Materials
(1)
B00715 Solvent - Methyl Ethyl Ketone, TT-M-261
(2)
B00666 Solvent - Methyl Propyl Ketone (this is an alternative to Methyl Ethyl Ketone)
(3)
C00745 Cleaner - Turco Transpo
(4)
D00053 Grease - MIL-G-6032
C. References
(1) AMM 49-52-21/501, Differential Air Pressure Regulator
D. Access
(1)
Location Zones
101 Control Cabin (Left)
205 Electronic Compartment
703 APU Compartment
(2)
Access Panels
1201 Electronic Equipment Access Door
3804 APU Cowl Door
E. Procedure
S 863-002
(1) Set the switch and the circuit breaker:
(a)
Set the APU master switch, on the P5 forward overhead panel, to the OFF position and attach a DO-NOT-OPERATE tag.
(b)
Open this circuit breaker and attach a DO-NOT-CLOSE tag: 1) E3-3 Electrical Shelf, APU Control Unit
S 013-003
(2) Open the APU cowl door:
(a) Open the latches for the APU cowl door.
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////////////////////////A / GTCP85-129 SERIES /737-300/400/500/ ENGINES /MAINTENANCE MANUAL ////////////////////////
SEE A
BLEED AIR AIR INLET
VALVE LINE
CLAMP
COVER
CLAMP SCREW
ELEMENT
PACKING PRESSURE REGULATOR HOUSING
LOCK-O-SEAL
(AIRESEARCH
P/N X-050554-2)
INBD
A
Differential Air Pressure Regulator Unit Servicing Figure 301
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(b) (c) Open the APU cowl door.Connect the door support rods.
(3) S 033-004Disconnect the air inlet line from the pressure regulator and the bleed air valve: (a) Remove the clamp for the air inlet line. (b) Disconnect the air inlet line.
(4) S 023-005Remove the pressure regulator filter: (a) Remove the cover from the pressure regulator housing. (b) Remove the pressure regulator filter. (c) Remove the packing. (d) Discard the packing.
(5) S 033-006Remove the lock-o-seal and the retainer washer from the pressure regulator housing.
(6) S 113-007Clean the pressure regulator filter: (a) Clean the pressure regulator filter with the Turco Transpo.
WARNING:_______ DO NOT GET THE SOLVENT IN YOUR MOUTH, OR YOUR EYES, OR ON YOUR SKIN. DO NOT BREATHE THE FUMES FROM THE SOLVENT. PUT ON A PROTECTIVE SPLASH GOGGLE AND GLOVE WHEN YOU USE THE SOLVENT. KEEP THE SOLVENT AWAY FROM SPARKS, FLAME, AND HEAT. THE SOLVENT IS A POISONOUS AND FLAMMABLE MATERIAL WHICH CAN INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(b) (c) Clean the pressure regulator filter with the solvent.Dry the pressure regulator filter with the air.
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