KLEX Blue Grass Airport — Instrument Checkride Guide

What kind of airport is KLEX and what is its IFR environment?

Blue Grass Airport (KLEX) serves Lexington, Kentucky — the center of the bluegrass horse country — from the rolling plateau at 979 ft MSL. The airport operates inside Class C airspace and serves a mix of commercial airline traffic, fractional and corporate aircraft, and a busy general aviation population. Under 14 CFR 91.130, two-way radio communication must be established with ATC before entering Class C airspace. On an IFR clearance, that requirement is satisfied by the clearance itself.

Lexington Approach manages arrivals and departures on two frequencies: 120.15 MHz for the 040–220 degree sector and 120.75 MHz for the 221–039 degree sector. Lexington Tower operates on 119.1 MHz. ATIS broadcasts on 126.3 MHz. Ground control is 121.9 MHz.

Both primary runways are equipped with Engineered Material Arresting Systems (EMAS) at each end — a safety feature more common at commercial service airports that stops aircraft overrunning the runway without the barrier risks of traditional arrestor systems. The presence of EMAS is operationally transparent to the pilot but reflects KLEX's status as a medium-complexity commercial airport.

What instrument approaches are published at KLEX?

KLEX publishes 6 instrument approach procedures, sourced from AirNav and verified against current SkyVector chart listings.

The VOR-A is a circling-only approach, meaning it has no straight-in landing minimums aligned with any runway. Pilots must maintain visual contact with the runway environment throughout the circle and comply with circling obstacle clearance requirements. Special alternate minimums apply at KLEX — verify published alternate minimums before designating KLEX as an IFR alternate.

What is the runway configuration at KLEX?

KLEX operates 2 runways. Runway 4/22 at 7,004 × 150 ft is the primary instrument runway and supports ILS approaches on both ends. Runway 9/27 at 4,000 × 75 ft is a shorter crosswind runway with RNAV approaches only. Both runways have EMAS installations.

Runway 4/22 is active for most IFR operations. The 4,000 ft runway 9/27 is operationally limited for heavier or faster aircraft and is typically used by light GA. The DPE may assign runway 9/27 for an RNAV approach specifically to test whether you brief the shorter runway length and adjust approach speed accordingly.

What weather should instrument pilots expect at KLEX?

Lexington lies in the Ohio Valley corridor, one of the most consistently IFR-producing regions of the eastern United States in winter. Warm, moist air pushing northward ahead of cold fronts frequently overrides cold air in the valley, producing widespread freezing rain and freezing drizzle. These events — common from December through February — can deposit significant ice accumulation in minutes and reduce visibility to near zero. Pilots without ice protection should exercise extreme caution filing IFR into the Lexington area during winter frontal passages.

Fog along the Kentucky River valley and surrounding bottomlands is a persistent morning hazard. Ceilings of 300–500 ft overcast are common in autumn and early winter on clear, calm nights when radiative cooling drives surface temperatures below dew point. The ceiling typically rises quickly once surface heating begins after sunrise.

Summer convection at KLEX is driven by instability ahead of approaching fronts from the west and by orographic lifting off the Cumberland Plateau to the east and southeast. Convective activity typically develops in the late afternoon and can produce embedded cells and rapidly falling ceilings along IFR routes. UPS cargo operations at nearby KSDF (Louisville) generate significant traffic on the Louisville–Lexington V-97 corridor — expect heavier than usual IFR traffic on that airway.

What should you expect on an instrument checkride at KLEX?

A checkride at Blue Grass Airport places you in an active Class C environment where commercial airline operations and GA traffic share the same runways and approach fixes. ATC at Lexington Approach manages this mix professionally but expects precise readbacks and immediate altitude compliance from all IFR aircraft. The DPE will watch how you communicate with approach control and whether your clearance readbacks are complete and accurate.

The ILS RWY 04 and ILS RWY 22 are the natural precision approach candidates. Runway 4/22 is long enough that the DPE may request a short-field landing technique after the ILS — a common addition that evaluates landing judgment separate from instrument proficiency. Know your aircraft's short-field landing distance from the POH and be able to recite it during the oral.

The VOR-A circling approach is a probable DPE addition, as circling approaches are explicitly evaluated in ACS Area VI. When assigned a circling approach, you must maintain visual contact throughout the maneuver — if you lose visual contact, the published missed approach must be executed immediately per 14 CFR 91.175(e). The DPE may simulate a sudden cloud base drop mid-circle to test your response.

Expect a hold at some point. Lexington Approach may offer a published hold or the DPE may issue a non-published hold over a nearby fix. Entry procedure, wind correction, timing, and EFC time requests are all evaluated. If given a complex hold entry heading, draw it out mentally before executing.

Practice Questions

1. You are assigned the VOR-A approach at KLEX. The approach has circling-only minimums. Explain the difference between a circling MDA and a straight-in DA, and identify what visual reference must be maintained throughout the circling maneuver under 14 CFR 91.175.

2. Lexington Approach clears you for the ILS RWY 22 and instructs you to maintain 3,000 ft until established on the localizer. You reach the localizer but are still descending through 3,200 ft. Are you established on the approach, and can you descend below 3,000 ft?

3. On the RNAV (GPS) RWY 09, your avionics show LNAV as the available mode — no LPV. What minimum descent altitude and visibility apply, and why would LPV not be available in this scenario?

4. KLEX has EMAS on both runway ends. A student asks what EMAS is and whether it changes emergency procedures. How do you answer?

5. You are flying the ILS RWY 04 during a freezing drizzle event. At 1,500 ft on final, you encounter moderate mixed icing and your airspeed starts dropping. Walk the DPE through your in-flight icing decision under 14 CFR 91.9 and the Instrument Flying Handbook guidance.

Frequently Asked Questions

Q: What instrument approaches are published at KLEX?

KLEX publishes ILS approaches to runways 4 and 22, RNAV (GPS) approaches to all four runway ends (04, 09, 22, 27), and a VOR-A circling approach. Runways 4 and 22 are the primary instrument runways on the 7,004 ft main runway.

Q: What airspace class is Blue Grass Airport?

KLEX is surrounded by Class C airspace. Under 14 CFR 91.130, two-way radio communication must be established with ATC before entering Class C airspace. Lexington Approach handles IFR operations on 120.15 MHz and 120.75 MHz.

Q: What are the runway lengths at KLEX?

KLEX has two runways: runway 4/22 at 7,004 × 150 ft (primary instrument runway with ILS on both ends) and runway 9/27 at 4,000 × 75 ft (RNAV approaches only). Both are equipped with EMAS overrun protection.

Q: What is the ATIS frequency at KLEX?

KLEX ATIS broadcasts on 126.3 MHz. Lexington Tower operates on 119.1 MHz. Lexington Approach uses 120.15 MHz for the 040–220 degree sector and 120.75 MHz for the 221–039 degree sector. Ground control is 121.9 MHz.

Q: What is the VOR-A approach at KLEX?

The VOR-A at KLEX is a circling-only approach — it has no straight-in landing minimums to any specific runway. Circling approaches require the pilot to maintain visual contact with the runway environment throughout the maneuver. Circling MDA and visibility minimums are published by aircraft approach category.

Q: What weather hazards should instrument pilots expect at KLEX?

Lexington lies in the Ohio Valley, which is susceptible to widespread IFR conditions during winter. Freezing rain and freezing drizzle are common during warm-sector intrusions in December through February. Summer convection from approaching fronts and the Appalachians can produce rapid IMC. Fog along the Kentucky River valley affects morning ceilings.

Q: What is the field elevation at Blue Grass Airport?

Blue Grass Airport (KLEX) has a surveyed field elevation of 979 ft MSL, sitting on the rolling bluegrass plateau of central Kentucky. This elevation is significant for density altitude calculations during summer operations.

Sources

• AirNav — KLEX Airport Information
• SkyVector — KLEX Instrument Approach Procedures
• 14 CFR 91.130 — Operations in Class C Airspace (Cornell LII)
• 14 CFR 91.175 — Takeoff and Landing Under IFR (Cornell LII)
• FAA Instrument Flying Handbook FAA-H-8083-15B

This article was researched from FAA primary sources (ACS, FAR/AIM, Advisory Circulars, Instrument Flying Handbook), approach procedure data from AirNav and SkyVector, and citing current 14 CFR Part 91 — drafted by MockDPE. Last updated: May 2026. If you spot an inaccuracy, email corrections@mockdpe.org.