ACS Alignment

FAA-S-ACS-16 — Commercial Pilot, Rotorcraft–Helicopter · Area of Operation I. Preflight Preparation · Task: G — Operation of Systems

CH.I.G.K1 — powerplant, transmission & rotor systems CH.I.G.K2 — fuel, electrical, hydraulic & instrument systems CH.I.G.R1 — system limits & abnormal indications CH.I.G.S1 — operate & monitor systems within limits

⚑ FLAG (Walter): confirm Task letter (G) and codes; describe only the systems actually installed on the student’s R44 per its POH.

Helicopter Systems

Know the machine: engine, drivetrain, rotor system, and the fuel, electrical, and (if fitted) hydraulic systems.

By the end of this lesson you can:

Describe the powerplant, transmission/clutch, and main & tail rotor systems at a working level.
Explain the fuel, electrical, and hydraulic (if installed) systems and their gauges/limits.
Recognize normal vs. abnormal indications and the correct response.
Operate and monitor the systems within published limits.

1 · Engine, drivetrain & rotors

Understand how engine power reaches the rotors through the clutch/belt drive and transmission, how the governor/correlator manages RPM, and how the main and tail rotor systems produce lift and antitorque. Know the function of the freewheeling unit that allows the rotor to autorotate if the engine stops. The R44 is a piston, semi-rigid two-blade design — know its specifics from the POH.

2 · Fuel, electrical & hydraulic

Know fuel quantity/usable fuel, tank selection and gauging, and the electrical system (battery, alternator, what is powered). If your R44 has hydraulic flight-control assistance, understand normal operation, the indications of a failure, and the procedure for hydraulic-off flight. Confirm which systems your specific aircraft has.

3 · Monitoring & abnormals

Scan the gauges — RPM, manifold pressure, oil temp/pressure, CHT, electrical — and know the green/limit values and the immediate action for an abnormal indication (e.g., low rotor RPM, rising temps, warning lights). A commercial pilot anticipates and catches a trend before it becomes an emergency.

4 · Watch

Curated reference clip — “How to Control a Helicopter — Collective, Cyclic & Pedals Explained” · Pilot Teacher (YouTube), verified via oEmbed. Embedded with the creator’s player; we don’t host or alter it.

5 · Reference sources

Use the authoritative references

📄 Helicopter Flying Handbook (FAA-H-8083-21) — Systems 📄 Robinson R44 POH — Systems Description (Section 7)

Your aircraft: the installed systems, gauges, and limits (and whether hydraulics are fitted) are aircraft-specific — note them from the R44 POH Section 7 (Systems Description) and Section 2 (Limitations).

✍️ Fill in for the aircraft you fly your R44’s rotor/engine RPM limits, manifold-pressure and temperature limits, electrical and fuel specifics, and whether hydraulics are installed — look these up in the R44 POH and confirm with your CFI.

⚑ FLAG (Walter): the R44 is a VFR-certificated piston helicopter; confirm the aircraft/figures the student actually flies and that all numbers come from the current R44 POH.

Risk management (the “Consider”): the systems trap is not knowing your gauges — missing a rising temperature, a charging fault, or the first sign of low rotor RPM. Build a habitual scan, know the limit values cold, and have the immediate-action items for the common abnormals memorized.