UNDERSTAND GOVERNING, BETA AND FAULT ISOLATION
WWAOG Technical Academy
ATA 61 • King Air B300/B300C

TM-071 | King Air Propeller Control, Autofeather & Synchrophasing

Propeller system architecture

Governing, beta feedback, autofeather and synchrophasing

Required measurement bench

Compare balance changes, residual vibration and pickup waveforms

Evidence before restoration

Separate control, indication and mechanical faults using installation-specific evidence
Learn how King Air propeller governors, oil, blade forces, autofeather logic and synchrophaser signals work together. Includes a 25-page handbook, eight lessons, six prediction exercises, eight two-stage cases and a 40-question final. Identify the installed propeller and modification status before selecting the applicable task.

What's included?

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

Understand the connected system

Trace primary governing, protective governing and beta feedback. Follow autofeather from arming through opposite-side disarming to affected-side oil dumping, and distinguish TEST from normal ARM proof. Connect synchrophaser pickup timing, controller output and governor trim response.

Practice defensible fault isolation

Complete six prediction-and-Apply exercises, eight two-stage cases, a balance and waveform decision bench and twelve independent decisions. Complete all 24 lab requirements and pass the separate 40-question final at 80%. Based on supplied King Air 130-590031-11 Chapter 61, with the November 2025 effective-page list identified; aircraft-effective tasks govern physical work.