ATA21 - Air Conditioning and Pressurization

The ATA21 CBT module contains detailed explanation about commercial aircraft's air-conditioning and pressurization system. The CBT has 169 pages of multimedia courseware that include text, audio, and graphics. The topics covered in this CBT are listed below.

  1. Air Conditioning
    • Introduction/General Description
    • Control Panels
    • Functional Description
    • Pack/Zone Temperature Controller - Bite
  2. Cooling
    • Introduction/General Description
    • Air Conditioning Accessory Unit
    • Flow Control And Shutoff Valve
    • Primary Heat Exch. & Plenum/Diffuser Assy.
    • Ram Air Ducts
    • Ram Air Actuator
    • Ram Air Temperature Sensor
    • Air Cycle Machine
    • Secondary Heat Exch. & Plenum/Diffuser Assy.
    • Water Extractor Duct
    • Reheater
    • Condenser
    • Water Extractor
    • Pack Temperature Sensor
    • Mix Manifold Temperature Sensor
    • Temperature Control Valve
    • Standby Temperature Control Valve
    • Pack Overheat Switches
    • Functional Description
  3. Distribution
    • Introduction
    • Main Air Distribution
    • Flight Compartment Air Distribution
  4. Recirculation System
    • Introduction
    • Recirculation Air Filter
    • Recirculation Fan
  5. Temperature Control
    • Introduction/Functional Description
    • Operation
    • Cabin Temperature Sensor Assembly
    • Duct Temperature Sensor
    • Pack/Zone Temperature Controller
    • Trim Air Pressure Regulating & Shutoff Valve
    • Zone Trim Air Modulating Valve
    • Duct Overheat Switch
    • Temperature Bulb
  6. Equipment Cooling System
    • Introduction/Functional Description
    • Operation
    • Air Filter
    • Supply And Exhaust Fans
    • Low Flow Detector
    • Overboard Exhaust Valve
  7. Supplemental Heating
    • Door Area Heater
    • Emergency Escape Door Heater Blankets
  8. Cabin Pressurization
    • Introduction/General Description
    • Auto Mode Operation
    • Interface
    • Cabin Pressure Control Module
    • Cabin Altitude Panel
    • Cabin Pressure Controller
    • Aft Outflow Valve
    • Auto Fail
    • Off-Schedule Descent Light
    • Positive Pressure Relief Valve
    • Cabin Altitude Warning Switch
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