AirComm Corporation Cessna Citation 500 501 Maintenance Manual
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Products, Inc Maintenance Manual April 25/07 Page 1 RECORD OF REVISIONS REV NO. ISSUE DATE DATE INSERTED BY REV NO. ISSUE DATE DATE INSERTED BY IR 05-15- 95 TS A 4/25/07 AJ
Products, Inc Maintenance Manual May 15/95 Page 1 LIST OF SERVICE BULLETINS SERVICE BULLETIN NO. DATE SUBJECT REVISION NO. DATE INCORP.
Products, Inc
Maintenance Manual
List of Effective Pages
April 25/07
Page 1
LIST OF EFFECTIVE PAGES
CHAPTER
SECTION
SUBJECT
PAGE DATE
Title 1 April 25/07
List of Revisions 1 April 25/07
Record of Revisions 1 April 25/07
Service Bulletin List 1 May 15/95
List of Effective Pages 1 April 25/07
2 April 25/07
Table of Contents 1 May 15/95
Introduction 1 May 15/95
2 May 15/95
21-50-00 1 May 15/95
2 May 15/95
3 May 15/95
21-50-01 1 May 15/95
101 May 15/95
102 May 15/95
103 May 15/95
1001 May 15/95
1002 May 15/95
1003 May 15/95
Products, Inc Maintenance Manual List of Effective Pages April 25/07 Page 2 LIST OF EFFECTIVE PAGES CHAPTER SECTION SUBJECT PAGE DATE 21-50-02 1 May 15/95 201 May 15/95 202 May 15/95 601 May 15/95 1001 May 15/95 1002 May 15/95 21-50-03 1 May 15/95 101 May 15/95 102 May 15/95 201 May 15/95 202 May 15/95 1001 May 15/95 1002 May 15/95 21-50-04 1 May 15/95 101 May 15/95 201 May 15/95 1001 May 15/95 1002 April 25/07 1003 April 25/07
Products, Inc
Maintenance Manual
Contents
May 15/95
Page 1
TABLE OF CONTENTS
Chapter
Section
Subject
Subject Page
INTRODUCTION
1
AIR CONDITIONING SYSTEM
21-50-00
System Description 1
ELECTRICAL
21-50-01
Description & Operation 1
Troubleshooting 101
Illustrated Parts List 1001
PLUMBING
21-50-02
Description & Operation 1
Maintenance Practices 201
Inspection/Check 601
Illustrated Parts List 1001
COMPRESSOR CONDENSER ASSEMBLY
21-50-03
Description & Operation 1
Troubleshooting 101
Maintenance Practices 201
Illustrated Parts List 1001
LEFT & RIGHT EVAPORATOR ASSYS
21-50-04
Description & Operation 1
Troubleshooting 101
Maintenance Practices 201
Illustrated Parts List 1001
Products, Inc Maintenance Manual Contents May 15/95 Page 2 INTRODUCTION 1. PURPOSE The purpose of this Maintenance Manual is to provide detailed instructions for the troubleshooting, checking and maintaining of the Keith Products, Inc. air conditioning system for the Cessna Citation aircraft, models 500 and 501. The Keith Products air conditioning system is installed in accordance with STC SA2698SW. 2. SCOPE The scope of the service and maintenance manual provides the maintenance technician with detailed information covering: - Overall system level description and theory of operation. - Component level description and theory of operation. - Component checking and troubleshooting procedures. - Maintenance practices to keep the environmental control system operating at its maximum efficiency. - The identification of special equipment to accomplish the specific tasks. - An Illustrated Parts List (IPL) covering the breakdown of each major component of the air conditioning system, including part number and relevant illustrations. 3. ARRANGEMENT This Maintenance Manual is arranged in accordance with Air Transport Association (ATA) Specification 100 and includes an Illustrated Parts List. 4. GLOSSARY Nonstandard abbreviations and symbols used in the Maintenance Manual are described below. Abbreviations:
Products, Inc Maintenance Manual Contents May 15/95 Page 2 A/C - Air Conditioning A/R - As Required Assy - Assembly Comm. Avail. - Commercially Available Evap - Evaporator FWD - Forward Gnd - Ground GPU - Ground Power Unit IPL - Illustrated Parts List STC - Supplemental Type Certificate SW - Switch VDC - Volts Direct Current
Products, Inc
Maintenance Manual
21-50-00
May 15/95
Page 1
AIR CONDITIONING SYSTEM - SYSTEM DESCRIPTION
1. GENERAL
The air conditioning system for the Cessna 500/501 aircraft consists of a refrigerant
R134a vapor cycle cooling system. This system allows the crew to control cooling for
a comfortable aircraft cabin. Figure 1 shows a general arrangement of the air
conditioning system.
The control panel contains the cooling system ON/OFF/FAN switch, the FWD fan
LOW/HIGH switch, the AFT fan OFF/LOW/HIGH and a blue A/C system ON
indicator.
2. COOLING SYSTEM
The cooling or air conditioning system, as designed and manufactured by Keith
Products for the Cessna 500/501 aircraft, is a vapor cycle type cooling system using
refrigerant R134a. The system is electrically operated using the aircraft 28 VDC
electrical system and is operable in all normal flight modes up to 18,000 feet MSL.
Air conditioning may be operated with ground external power or the aircraft electrical
system providing 28 vDC to the non-essential buss.
The major components of the system are the compressor/condenser assembly with
blower, and two evaporator/cabin blower units. Refrigerant plumbing and electrical
systems connect the major component to provide a closed loop system.
The compressor/condenser assembly is mounted across from the rear baggage door.
The compressor drive and condenser fan drive are both driven by a common, double
shafted motor which turns at approximately 4500 RPM. The compressor is belt
driven from the shortest shaft while the condenser fan is attached directly to the
longer motor shaft. Condenser cooling air (ambient air) is drawn in through a cutout
below the right engine pylon or the NACA scoop located on the ventral fin. The air
passes over the compressor and drive motor to provide cooling airflow for those
components prior to passing through the condenser coil to remove heat from the
system. After passing through the condenser coil, the air is exhausted to the outside
through an exhaust duct located on the air cycle exhaust plenum or through a
fuselage cutout, if Service Bulletin SB135 has been accomplished. It then exits
through louvers on the lower right side of the fuselage. The compressor takes low
pressure refrigerant gas and compresses it to a higher pressure and temperature.