TRACE FUEL METERING AND ENGINE CONTROL SIGNALS
WWAOG Technical Academy
ATA 73 • King Air B300/B300C • PT6A-60A

TM-076 | King Air PT6A-60A Fuel Metering & Diagnostic Testing

Connected fuel and control paths

Follow pump delivery, FCU metering, Ng feedback and P3/Py governing signals

Interpret specific test records

Separate nozzle spray quality, seal-drain leakage and pneumatic test evidence

Explain cause and prove restoration

Connect each symptom to its physical route and the evidence needed after correction
Trace PT6A-60A fuel from conditioning and pump delivery through FCU metering to the primary and secondary nozzle groups. Understand how mechanical Ng feedback, compressor-discharge P3 air and Py governing air influence fuel flow. Follow the B300 shutdown-purge path and distinguish supply, control, atomization and indication faults.

What's included?

  • 8 focused lessons
  • Completion certificate
  • 40-question final
  • 8 guided fault cases
  • Illustrated student handbook

Understand the connected system

Learn why a maintained pump outlet does not prove correct metering, and why metered fuel does not prove good nozzle atomization. Explore the FCU speed-control loop, P3 acceleration scheduling and Py fuel limiting. Diagnostic records name the component, test setup and applicable study criterion so each decision has a clear technical basis.

Practice defensible fault isolation

Complete eight lessons, six prediction-and-Apply exercises, eight two-stage cases and six fixed diagnostic records. All 24 lab requirements must be complete. The twelve-decision independent review requires at least 80% and all eight critical decisions correct in the same attempt. The separate forty-question final requires at least 32 correct answers. The online certificate requires the handbook, mastered lab and final pass; practical qualification is separate.