AirComm Corporation Airbus AS350 Air Conditioner Instructions for Continued Airworthiness User Manual

AIR CONDITIONER SERVICE MANUAL AS350-200M-1 
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11. Distribution 
This  document  is  to  be  placed  with  the  aircraft  maintenance  records  at  the  time  of 
system installation. 
 
Changes  will  be  made  to  this  document  in  response  to safety-of-flight  or non-safety-of-
flight  issues.  Any  changes  will  result  in  a  revision  to  this  document.  Revisions  shall  be 
noted in the Record of Revisions and on the List of Revisions of this manual. 
 
In  addition  to  the...

AIR CONDITIONER SERVICE MANUAL AS350-200M-1 
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A  “COMP  ON” green  or  blue annunciator,  located  on  the  instrument  panel,  provides  a 
visual  status  of  compressor  operation.  For  aircraft  equipped  with  a VIVISUN  lighted 
pushbutton switch, compressor engagement is displayed on the switch as a blue COMP 
ON annunciation. 
 
 
 
Figure 1-1 – Air Conditioning System Control Panel 
 
The compressor is mounted on the surface of the main gearbox coupling case, in the aft...

AIR CONDITIONER SERVICE MANUAL AS350-200M-1 
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As a backup measure to protect the system from an over-pressure situation a pressure 
relief valve is also incorporated into the flow circuit. The relief valve will open between 
550 and 610 psi and will re-close once pressures are relieved below those pressures.  
14. Description of Vapor Cycle Air Conditioner and Installation 
 
This  section  contains  a  general  overview  of  a vapor-cycle  air  conditioning  system  and 
how  it...

AIR CONDITIONER SERVICE MANUAL AS350-200M-1 
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Figure 1-2 – Refrigeration Cycle Illustration 
(NOTE: This illustration is provided as a reference only and may not match actual installation) 
 
 
  
Compressor 
Condenser 
Aft Evaporator 
Receiver- 
Drier 
Bypass 
Valve 
Expansion 
Valves 
Fwd Evaporator 
high-press. high-
temp gas 
low-press. low-
temp gas low-press. low-
temp liquid 
high-press. high-
temp liquid  

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CHAPTER 2 
AIRWORTHINESS LIMITATION SECTION 
 
1. Airworthiness Limitations 
 
The  Airworthiness limitations  section  is  FAA  approved  and  specifies  inspections  and 
other  maintenance required  under  Sections  43.16  and  91.403  of  Federal  Aviation 
Regulations unless an alternative program has been FAA approved. 
 
“No airworthiness limitations are associated with this type design change.” 
 
FAA approval:...

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CHAPTER 3 
INSPECTIONS AND OVERHAUL  
1. Inspection Requirements 
 
PERIODIC INSPECTIONS 
(Hours are aircraft time) 
 Item Annual Every 25 Hours of Operation Every 100 Hours of Operation Special Inspection Information 
Evaporator Blower Hi/Lo Operation  X   X Check for operation  
Condenser Blower(s)  X    X Check for operation     Forward & Aft Evaporator Blower Motor 
X   X  Check for operation in Hi and Lo settings 
Compressor Drive Belt...

AIR CONDITIONER SERVICE MANUAL AS350-200M-1 
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b) De-mate each connector and inspect both mates for signs of overheating 
(discoloration or plastic deformation). If any signs of overheating of the housing are 
present the system must be rendered inoperative and the connector housing and 
contacts replaced before further operation. Contact ACC service dept. for replacement 
parts if necessary. 
c) Installation & replacement of the wire harness electrical connectors for the evaporator...

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CHAPTER 4 
LOCATION AND ACCESS 
1. Location of Air Conditioner Components 
 
 
 
Nomenclature Description of Location 
 Air Conditioner Circuit Breaker & Relay Panel  Forward bulkhead of right side baggage compartment 
 Air Conditioner Control Panel  Overhead panel or Instrument Panel 
 Forward (Cockpit) Evaporator and Blower  
RH side center console below instrument panel in chin bubble area – blower is integral to forward evaporator 
 Aft...

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SIDE VIEW 
Figure 4-1 – Layout of AS350 Air Conditioning System 
 
 
 
TOP VIEW 
Figure 4-2 – Layout of AS350 Air Conditioning System 
Air Dist Instl 
Compressor Instl 
Condenser Instl (Baggage) 
Plumbing Instl 
Aft Evap Instl 
Electrical Instl 
Forward Evap Instl 
Air Dist Instl 
Aft Evap Instl 
Condenser Instl (Baggage) Forward Evap Instl 
Compressor Instl 
Condenser Instl (Tail Boom) 
Condenser Instl (Tail Boom)