What you will study
Connect engine feeds, isolation and the regulated supply
Follow both bleed-air feeds through their check valves to the common tee and pressure regulator. Explain how one source can supply the common system while the inactive branch still needs reverse-flow isolation. Keep normal regulation and protective relief as distinct functions; a common pressure reading does not prove every consumer route or inactive check valve.
Explain ejector suction and the actual instrument paths
Trace pneumatic driving energy into the ejector and separate filtered-air from vacuum manifolds. Identify conventional instrument IN/VAC connections and the suction gage’s two references. Normal shared suction does not prove a local inlet connection, and a family schematic does not establish that every modern instrument is pneumatically driven.
Prove preparation, setting and the linked follow-up
Interpret the named engine-speed preparation, pressure band and asymmetric vacuum-setting tolerance. Establish correct driving pressure and both filter conditions before judging the vacuum check. Pressure-setting work can affect suction, while regulator-filter replacement has its own setting follow-up. No pressure-to-vacuum or leakage-loss formula is inferred.
Keep shutoff command, leakage and installation evidence separate
Compare the specified shop-air and electrical preparation with the OPEN/OFF indication response. Retain the actual outlet-fitting leak location rather than assigning an unproved internal-seat fault. Flow direction, drainage, vent/solenoid clearance and removal of temporary supply remain physical requirements alongside favorable readings.
Complete the Rev A diagnostic learning path
The 44-page handbook supports eight lesson checks, six prediction-and-Apply exercises, eight two-stage cases and six fixed records with 20 classifications and two entered calculations. The 12-question independent review requires at least 80% and all eight critical decisions correct in the same attempt. The core lab has 24 completion requirements. Pass the separate 40-question final at 80%, with at least 32 correct. The online certificate requires the handbook, mastered lab and passing final; practical qualification is separate.
Learning outcomes
- Trace the shared pneumatic supply and explain inactive-engine reverse-flow isolation.
- Distinguish regulated pressure, ejector energy, suction and the actual fitted consumer paths.
- Use complete preparation and the named pressure/vacuum criteria to interpret diagnostic records.
- Retain separate command, fitting-leak, physical installation and linked post-work proof.
Aircraft and course applicability
King Air B300/B300C pneumatic and vacuum installations described in supplied Textron Maintenance Manual 130-590031-11, Chapters 36/37, with effective-page lists dated November 1, 2025. Conventional pneumatic-instrument branches apply when installed; electronic attitude and heading equipment is not assumed vacuum driven. Use current aircraft-effective instructions and verify installed equipment before physical work.
WWAOG provides independent training. Online completion records knowledge and simulation achievement; it does not replace observed practical qualification, employer authorization or applicable licensing. Use current aircraft-effective maintenance instructions for physical work.
