Understand how air, heat and control paths work together

TM-024B | King Air Heating, Cooling & Environmental Troubleshooting

Airflow paths

Cockpit and cabin supply, return and distribution

Heating & cooling

Bleed-air mixing, vapor-cycle cooling and ground heat

Diagnostic evidence

Controller commands, physical response and sensor checks
Understand the B300/B300C Keith Products dual-zone environmental system: bleed-air mixing, vapor-cycle cooling, distribution, sensing and ground electric heat. Includes a 25-page handbook, interactive workbench, six prediction exercises, eight two-stage cases and a 40-question final.

What's included?

  • 8 focused lessons
  • Completion certificate
  • 40-question final
  • 8 guided fault cases
  • 25-page handbook

Understand the connected system

Trace common bleed-air supply, the right-engine-driven refrigeration loop, separate cockpit and cabin air paths, linked mixing valves, six temperature sensors and controller outputs. Distinguish a commanded state from actual servo movement, and compare local faults with shared-source failures. Verify serial, controller and modification effectivity for the installed Keith Products system.

Practise defensible fault isolation

Use six prediction-and-Apply exercises, a mixing-box sensor resistance bench, eight two-stage diagnostic cases and a twelve-decision independent review. Complete all lab requirements and pass the 40-question final at 80%. Study source: supplied Beechcraft 434-590169-0009 Chapter 21, pages dated 1 May 2018. Current aircraft-effective instructions govern physical work. Online completion is separate from observed practical qualification.