HARDWARE ARCHITECTURE AND COMPONENTS

                     EQUIPMENT LOCATION

                     ELECTRICAL POWER SOURCE

              CONTROLS AND INDICATIONS

              CONTROLS AND INDICATIONS -SUPPLEMENTARY INFORMATION

                     CONTROLS

                     INDICATIONS

              SYSTEM PROTECTIONS

                     SYSTEM MONITORING

                     ACTIVE PROTECTIONS

              GROUND OPERATION

                     PRINT OR DOWNLOAD OF MAINTENANCE REPORT

       ATA 49 – AUXILIARY POWER UNIT

              TABLE OF CONTENTS

              GENERAL

                     ACRONYMS LIST

                     INTRODUCTION

                     FLIGHT DECK OVERVIEW 

              DESCRIPTION

                     GENERAL

                     APU SYSTEMS

                     APU ELECTRONIC CONTROL UNIT (ECU)

                     DISTRIBUTION

                     OPERATION

              DESCRIPTION - SUPPLEMENTARY INFORMATION

                     DESIGN PRINCIPLE

                     EQUIPMENT LOCATION

                     ELECTRICAL POWER SUPPLY

                     APU DETAILED DESCRIPTION

                     APU SYSTEMS

                     APU ELECTRONIC CONTROL UNIT (ECU)