ACS Alignment

FAA-S-ACS-8 — Instrument Rating, Rotorcraft–Helicopter · Area of Operation VI. Instrument Approach Procedures · Task: B — Precision Approach (PA)

IR.VI.B.K1 — ILS components & LPV/WAAS vertical guidance IR.VI.B.K2 — DA/DH, glideslope intercept & required equipment IR.VI.B.S2 — fly a PA to DA within standards, then land or go missed IR.VI.B.R1 — risk: false glideslope & continuing below DA

⚑ FLAG (Walter): confirm Task letter (B) and the K/R/S sub-numbers, and confirm whether the current FAA-S-ACS-8 groups LPV under the precision/APV Task — and the published tolerances (e.g., full-scale deflection limits) for the rotorcraft standard.

Precision Approaches (ILS) & Vertical Guidance (LPV)

A glideslope to a Decision Altitude — be visual by DA or go missed, no negotiation.

By the end of this lesson you can:

Name the ILS components — localizer, glideslope, marker beacons/DME — and what each provides.
Explain how a WAAS LPV approach gives ILS-like vertical guidance to an LPV DA without ground equipment.
Intercept the glideslope from below, keep the needles centered, and fly to the Decision Altitude (DA).
State the rule: at DA you must already be executing the missed approach if the required visual references are not in sight.

1 · The ILS and its LPV cousin

An ILS combines a localizer (lateral course to the runway) and a glideslope (a roughly 3° vertical path), giving precise lateral and vertical guidance to a low Decision Altitude. A WAAS LPV (localizer performance with vertical guidance) approach produces a comparable angular lateral and vertical path computed by the navigator from satellites — no ground transmitters required — flown to a published LPV DA. Both are flown the same way in the cockpit: center the needles and fly the path to DA.

2 · Flying the path

Phase	Technique
Intercept	Capture the localizer first, level at glideslope-intercept altitude, and intercept the glideslope from below at the FAF/GSI point.
Track	Small, smooth corrections: power/collective controls the path, attitude controls the airspeed. Keep both needles near center.
Approaching DA	Be ready: one glance for the runway environment; if visual and in a position to land, continue — if not, go missed at DA.
Decision	At DA the decision is binary. No “a little lower” — DA is a height, not a suggestion.

3 · Watch for the traps

Intercepting the glideslope from above can capture a false glideslope (a higher harmonic of the signal) that descends at a dangerous rate — always intercept from below at the published altitude. Confirm the correct localizer ident, watch for a flagged glideslope, and remember that a localizer is more sensitive than a VOR, so corrections near the runway must be small. On LPV, confirm the unit annunciated LPV (not LNAV) and that vertical guidance is active before relying on the glidepath to DA.

4 · Watch

Curated reference clip — “How to Fly an ILS Approach | Glideslope Intercept | Approach Clearance,” FlightInsight (YouTube), verified via oEmbed. Embedded with the creator's player; we don't host or alter it.

5 · Reference sources

Use the authoritative references

📄 Instrument Flying Handbook (FAA-H-8083-15B) — Ch.10 IAPs (ILS / Precision) 📄 Instrument Procedures Handbook (FAA-H-8083-16) — Precision & APV Approaches

Your aircraft: the airspeed, power/collective setting, and rate of descent that hold a 3° glidepath are aircraft-specific — note your R44's approach speed and the resulting descent rate from the POH Section 4 (Normal Procedures), and your installation's LPV capability from the avionics supplement.

✍️ Fill in for the aircraft you fly Final-approach airspeed and the ~ft/min needed to hold a 3° glidepath at that speed, plus whether your navigator is LPV-capable — look it up in the R44 POH (Normal Procedures / avionics supplement) and confirm with your CFI.

⚑ FLAG (Walter): the R44 is a VFR-certificated helicopter; confirm ILS/LPV approaches are flown in an IFR-approved trainer/sim and that the installed equipment actually supports a precision/LPV approach.

Risk management (the “Consider”): two precision-approach killers are the false glideslope (intercept from below, at altitude) and continuing below DA without the required references hoping the runway appears. Stabilize early, fly small corrections, and make the DA decision a reflex: visual and in position to land, or go around. In a helicopter, a missed approach is cheap; pressing a marginal approach is not.