★ PTS mapping: This lesson aligns to FAA-S-8081-20A (Nov 2023), Area of Operation VIII — Emergency Procedures (per Lesson→Area map). It is a PTS, so items are Tasks/elements (no ACS K/R/S codes); read the exact Task lettering and tolerances from the current published PTS.
The helicopter-specific emergencies that demand recognition in seconds and the right reflex, not the wrong one.
An antitorque drive failure (broken drive, control failure, or loss of thrust) removes the tail rotor's ability to counter main-rotor torque, producing an uncommanded yaw whose direction depends on power and design. Loss of tail-rotor effectiveness (LTE) is different: the tail rotor still works, but a combination of low airspeed, high power, and certain wind azimuths overwhelms its authority and the aircraft begins an uncommanded (often rapid) yaw. The fixes diverge — LTE is frequently corrected by reducing power demand and gaining airspeed/translational lift, whereas a mechanical antitorque failure typically forces a power-management and run-on/autorotative landing strategy. Knowing which one you have is the whole game.
| Failure | Cue | General response (confirm with your POH) |
|---|---|---|
| LTE (tail rotor working) | Uncommanded yaw at low speed / high power / adverse wind | Apply full corrective pedal, reduce power if able, lower nose to gain airspeed and regain translational lift |
| Antitorque drive/control failure | Loss of yaw control, pedal ineffective | Manage power/airspeed to control yaw, fly to a suitable area, run-on or autorotative landing per POH |
Dynamic rollover occurs when the helicopter pivots about a fixed point (a skid contacting the ground, a wheel chock, or a stuck skid) and rolls past a critical angle from which available cyclic can no longer arrest the roll. Contributing factors include lateral cyclic against the pivot, slope operations, crosswind, and — critically — collective applied while a skid is anchored. The defenses are smooth, slow control inputs near the ground; keeping the aircraft level relative to the horizon; and, if a roll begins, smoothly lowering the collective to reduce the rolling moment rather than fighting it with cyclic alone. Once past the critical angle, recovery may be impossible — so prevention is the lesson.
On a teetering (two-blade, semi-rigid) rotor such as the R44's, an abrupt forward cyclic push or a pushover into a low-G (near-weightless) condition unloads the rotor. With the disc unloaded, tail-rotor thrust rolls the fuselage right (in a typical U.S. counter-clockwise main rotor system), and an instinctive left cyclic input can drive the rotor hub into the mast — mast bumping — which can be catastrophic. The correct recovery is to gently apply aft cyclic first to reload the rotor (restore positive G), and only then correct any roll. Avoidance is paramount: no abrupt forward cyclic, no pushovers, and respect for turbulence and over-controlling.
Low-G / mast-bumping recovery: reload the rotor with gentle aft cyclic before correcting roll; avoid abrupt forward cyclic / pushovers. Verify the exact wording and any R-44-specific cautions against the current R-44 POH Section 3 and Robinson Safety Notices before using for instruction.
Fire/smoke: the priorities are to identify the source (engine, electrical, cabin), isolate it (fuel, electrical load, master as applicable), ventilate or contain smoke per the POH, and land as soon as possible — an in-flight fire is a land-immediately emergency. Electrical fires often call for shedding electrical load and securing the source; engine fires may call for a shutdown and autorotation. Ditching (water landing) involves a controlled descent, life-vest/flotation use where equipped, a touchdown technique appropriate to the aircraft, and egress planning — brief it before any overwater leg. All of these are aircraft-specific memory and read-and-do procedures; see the fill-in box.
Curated reference clip — “LTE Loss Of Tail Rotor Effectiveness Lesson Online Ground School” · Helicopter Online Ground School LLC (YouTube), verified via oEmbed. Embedded with the creator's player; we don't host or alter it.
✈️ Your test aircraft: the R-44 fill-in values cover its single-engine, piston, VFR figures. The R-44's two-blade teetering rotor makes low-G/mast-bumping highly relevant, but the ATP-H test aircraft (often a turbine, and possibly an articulated/rigid rotor) may have different emergency procedures and may not be subject to mast bumping. Use your actual test aircraft's data (§3-§4 procedures as relevant) from its RFM/POH for items marked aircraft-specific.