Safran PILATUS PC12 M19 User manual

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SYSTEM DESCRIPTION AND
OPERATION MANUAL
WITH ILLUSTRATED PARTS LIST
PILATUS PC12 M19
R-134a AIR CONDITIONING SYSTEM COMPONENTS:
DIRECT DRIVE COMPRESSOR MODULE 1150950-3
(Supersedes 1150950-2)
CONDENSER MODULE w/RECEIVER DRYER 1150970-1
AXIAL CONDENSER FAN 1250435-30
LEFT HAND EVAPORATOR MODULE 1150900-2
RIGHT HAND EVAPORATOR MODULE 1150910-2
ATA SPECIFICATION 21-00-60

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Table 1 Record of Revisions
RE
V
DESCRIPTION OF CH
A
NGE DATE
A
PPRO
V
A
L
ORIGINAL RELEASE 6/24//20 BS

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TABLE OF CONTENTS
1. MANUALINTRODUCTION................................................................................................................................7
1.1. Generalintroduction(HowtoUse):.........................................................................................................7
1.2. Acronyms,Abbreviations,and
Symbols: ..................................................................................................8
1.3. StandardTorque
Values: ..........................................................................................................................9
1.4. Documentsrequired:...............................................................................................................................9
2. SYSTEMDESCRIPTIONANDOPERATION........................................................................................................10
2.1. General:..................................................................................................................................................10
2.2. SystemDescriptionandOperation:.......................................................................................................11
2.3. SystemComponentDescriptionandOperation:...................................................................................12
3. TESTINGANDFAULTISOLATION....................................................................................................................15
3.1. General:..................................................................................................................................................15
3.2. SystemLeakCheckTesting
Procedure: ..................................................................................................15
3.3. FaultIsolation(Trouble‐
Shooting): ........................................................................................................17
4. SYSTEMPLUMBINGDIAGRAM.......................................................................................................................20
4.1. R‐134ARefrigerantFlowSchematic:......................................................................................................20
5. DISASSEMBLY.................................................................................................................................................21
5.1. General:..................................................................................................................................................21
5.2. CondenserModuleDisassemblyProcedures.........................................................................................22
5.3. EvaporatorModuleAssemblyDisassembly
Procedures ........................................................................23
6. CLEANINGPROCEDURES................................................................................................................................24
6.1. General:..................................................................................................................................................24
6.2. CondenserModuleCleaningProcedures:..............................................................................................25
6.3. EvaporatorModuleAssemblyCleaningProcedures:.............................................................................26
7. INSPECTIONSCHEDULE..................................................................................................................................27
7.1. CondenserModuleAssemblyInspection
Schedule: ..............................................................................27
7.2. EvaporatorModuleAssemblyInspectionSchedule:..............................................................................28
8. REPAIRPROCEDURES.....................................................................................................................................30

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8.1. General:..................................................................................................................................................30
8.2. CondenserModuleRepairProcedures:.................................................................................................30
8.3. EvaporatorModuleAssemblyRepairProcedures:................................................................................32
9. ASSEMBLY......................................................................................................................................................34
9.1. General:..................................................................................................................................................34
9.2. CondenserModuleAssemblyProcedures.............................................................................................35
9.3. EvaporatorModuleAssemblyProcedures.............................................................................................36
10. SPECIALTOOLS/EQUIPMENT.....................................................................................................................37
10.1. General:..............................................................................................................................................37
11. ILLUSTRATEDPARTSLISTING.....................................................................................................................38
11.1. Introduction:......................................................................................................................................38
12. SPECIALPRODECURES................................................................................................................................43
12.1. General...............................................................................................................................................43
12.2. Tools,Fixtures,Equipment,orconsumableitemsrequired:.............................................................43
12.3. Evacuatingthesystem.......................................................................................................................44
12.4. Chargingthesystem..........................................................................................................................44
12.5. Flushingthesystem(UseflushingkitpartnumberK1134100‐500)..................................................45
13. STORAGEPROCEDURES.............................................................................................................................47
13.1. General:..............................................................................................................................................47
13.2. SystemLongTermShelfStorage:.......................................................................................................47
13.3. SystemOff‐Season/On‐AircraftFunctionalTests:..............................................................................48
13.4. GeneralSystemComponentStorageprocedures:.............................................................................48

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LIST OF ILLUSTRATIONS
Figure 1 VCS Refrigerant Schematic .................................................................................................... 20
Figure 2 1150900-2 (Left) & 1150910-2 (Right) (1150910-2 Shown) ................................................... 39
Figure 3 1150970-1 Condenser Module ............................................................................................... 41
LIST OF TABLES
Table 1 Record of Revisions ................................................................................................................... 3
Table 2 Standard Torque Values ............................................................................................................ 9
Table 3 Consumable Products ................................................................................................................ 9
Table 4 Trouble-shooting ...................................................................................................................... 18
Table 5 Condenser Module Inspection ................................................................................................. 27
Table 6 Evaporator Inspection .............................................................................................................. 28
Table 7 Evaporator Parts Listing ........................................................................................................... 40
Table 8 Condenser Module Parts Listing .............................................................................................. 42
Table 9 Typical Operating Pressures .................................................................................................... 46

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INTRODUCTION
1. MANUAL INTRODUCTION
1.1. General introduction (How to Use):
1.1.1. This system description and operation manual (SDOM) covers the requirements for field
servicing the R-134A air conditioning system for the Pilatus PC12 M19 aircraft. This
document includes component descriptions, servicing, maintenance, inspection
requirements and an illustrated parts list.
1.1.2. This component maintenance manual has been prepared with guidance from the Air
Transport Association of America (ATA) Specification 2200. The user must not change the
repair methods in this manual without authorization from the aviation authorities and the
manufacturer.
1.1.3. This manual gives the procedures to perform the servicing and maintenance of the
component in a workshop environment as well as on the aircraft. Only approved personnel
with the necessary skills shall perform the maintenance procedures in this manual.
1.1.4. Although Enviro Systems tries to cover all conceivable issues that may arise, there may be
issues that are not covered in this manual. In these cases, please call Enviro Systems
customer service.
1.1.5. Technicians must use the instructions in this manual to do all the maintenance procedures
related to the component. Read all the related warnings, cautions and notes before you
begin work on the components. Warnings, cautions and notes shown in this manual provide
the following information:
WARNING: Discloses vital information in order to prevent injury or death
while performing the maintenance procedure.
CAUTION: Discloses vital information in order to prevent damage to the
equipment during the maintenance procedure.
NOTE: Discloses more information that will help perform a step of the
procedure or refers to a different procedure.
1.1.6. A complete Illustrated Parts Listing (IPL) is supplied as additional documentation (Section
11) to provide service technicians access to exploded views and a parts list while performing
maintenance, testing, disassembly and assembly procedures. Refer to the IPL for all figure
and item numbers.

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1.2. Acronyms, Abbreviations, and Symbols:
• CMM Component Maintenance Manual
• ATA Air Transport Association
• IPL Illustrated Parts Listing
• VCS Vapor Cycle System
• SDS Safety Data Sheet
• PSIG Pressure Per Square Inch, Gage
• SAE Society of Automotive Engineers
• CCW Counter Clockwise
• CW Clockwise
• FOD Foreign Object Damage
• OAT Outside Air Temperature

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1.3. Standard Torque Values:
Table 2 Standard Torque Values
T
Y
PE FASTENER DESCRIPTION
/
LOC
A
TION TORQUE
.25-28 SET SCREW EVAPORATOR BLOWER WHEEL 12-15 IN LBS
6-32 SCREW ALL LOCATIONS 8-10 IN-LBS
8-32 SCREW ALL LOCATIONS 12-15 IN-LBS
10-32 SCREW/BOLT ALL LOCATIONS 20-25 IN-LBS
¼-28-UNF ALL LOCATIONS 50-70 IN-LBS
5/16-24UNF ALL LOCATIONS 100-140 IN-LBS
3/8-24UNF ALL LOCATIONS 160-190 IN-LBS
5/8-18 PLUMBING
CONNECTIONS
RECEIVER DRYER INLET/DISCHARGE
PORT
132-156 IN-LBS
7/8-14 PLUMBING
CONNECTIONS
COMPRESSOR SUCTION PORT 252-324 IN-LBS
¾-16 PLUMBING
CONNECTIONS
COMPRESSOR DISCHARGE PORT 180-240 IN LBS
7/16-20 PLUMBING
CONNECTIONS
EXPANSION VALVE INLET PORT 100-140 IN LBS
¾-16 PLUMBING
CONNECTIONS
EXPANSION VALVE OUTLET PORT 270-350 IN LBS
1.4. Documents required:
• Illustrated Parts Listings (IPL) (included with this manual)
• Pilatus PC12 Aircraft Maintenance Manual
1.5. Consumable
Products:
Table 3 Consumable Products
EN
V
IRO P
A
RT
NUMBER
DESCRIPTION REM
A
RKS
/
A
LTERNATE PIL
A
TUS P
A
RT
NUMBER
11602 SEALANT RTV BLACK RTV 103
7471 THREAD SEALANT PRIMER LOCTITE 7471
569 THREAD SEALANT LOCTITE 569
RL-46H POE REFRIGERANT OIL ESTER

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DESCRIPTION AND OPERATION
2. SYSTEM DESCRIPTION AND OPERATION
2.1. General:
2.1.1. The air conditioning system installed on the Pilatus PC12 M19 Aircraft is not considered a
primary flight system. However, an air conditioning system does perform the important
function of providing passenger and flight crew comfort during aircraft movement on the
ground and while in flight. Aircraft air conditioning systems not only provide effective
passenger cooling, but must also maintain a high level of reliability to minimize aircraft
downtime due to unscheduled repairs.
2.1.2. In order to ensure component reliability and achieve a long service life for which the
system is designed, periodic inspection and preventive maintenance must be performed.
Failure to complete periodic inspections, service, or maintenance schedules may reduce
product life and potentially void manufacturer’s warranty.
2.1.3. Inspections, servicing, and/or maintenance schedules are presented in the following
sections. This will ensure component and/or system reliability and performance are
maintained when performed at the specified intervals.
WARNING: SERVICE TECHNICIANS ARE ADVISED TO OBSERVE STANDARD SAFETY
PRECAUTIONS, SUCH AS WEARING PERSONAL SAFETY GEAR, TO PREVENT INJURY WHILE
PERFORMING SERVICE TO THE UNIT. LIQUID REFRIGERANT CAN CAUSE FROSTBITE AND/OR
BLINDNESS.
WARNING: PROPER VENTILATION IS REQUIRED. KEEP REFRIGERANTS AND OILS AWAY FROM
OPEN FLAMES. REFRIGERANTS CAN PRODUCE POISONOUS GASSES IN THE PRESENCE OF A
FLAME. WORK IN A WELL VENTILATED AREA AND AVOID BREATHING REFRIGERANT /LUBRICANT
VAPOR MIST IF ACCIDENTAL DISCHARGE OCCURS.
WARNING: AVOID USE OF COMPRESSED AIR. DO NOT INTRODUCE COMPRESSED AIR OR
OXYGEN INTO AN AIR CONDITIONING SYSTEM OR REFRIGERANT CONTAINER. R-134A IN THE
PRESENCE OF AIR OR OXYGEN ABOVE ATMOSPHERIC PRESSURE MAY FORM A COMBUSTIBLE
MIXTURE.
2.1.4. Do not discharge R-134A refrigerant into the atmosphere. Although its ozone depletion
potential is zero, it can have an effect on global warming. In the United States recovery
and recycling are mandated by the Clean Air Act.