KGSP Greenville-Spartanburg Intl — Instrument Checkride Guide

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

Greenville-Spartanburg International Airport (KGSP) is located in Greer, South Carolina at 964 ft MSL, serving Greenville, Spartanburg, and the surrounding Upstate South Carolina region. The airport operates inside Class C airspace with a control tower on 120.1 MHz and Greenville Approach on 118.8 MHz (west) and 119.4 MHz (east). ATIS is on 134.25 MHz; ground is on 121.9 MHz. Tower and approach hours are 0600-2345 local — the airport is uncontrolled during overnight hours.

KGSP's most distinctive operational feature is its proximity to the BMW Manufacturing plant, which drives regular heavy transport operations on the single runway. BMW plant aircraft — including B747 freighters — operate routinely on the ILS. General aviation and commercial airline traffic share the same runway and IFR system, making sequencing awareness an important skill for pilots operating at KGSP. General aviation or military aircraft heavier than 120,000 lbs require prior permission.

What instrument approaches are published at KGSP?

KGSP has 6 published instrument approach procedures for its single runway pair, sourced from AirNav and SkyVector.

All 6 procedures serve a single runway. The CAT II-III and SA CAT I procedures are unavailable during a standard instrument rating checkride — the standard ILS or LOC RWY 04 and ILS or LOC RWY 22 are the examiner-assigned approaches. Always verify current minima on official FAA charts before flight.

What is the runway configuration at KGSP?

KGSP operates a single runway — 04/22 — at 11,001 × 150 feet. At that length, it ranks among the longest single runways at Class C airports in the southeastern United States, sized to accommodate the heavy freighter traffic supporting the BMW plant.

The single-runway configuration has a direct checkride implication: all departures and arrivals share one runway. A missed approach always results in an immediate return to the same runway environment. The DPE may use this as a discussion point on missed approach planning and fuel reserves. Heavy aircraft restrictions apply to certain taxiways — review NOTAMs for current taxiway weight limits before operating transport-category aircraft.

What weather should instrument pilots expect at KGSP?

Greenville-Spartanburg's position at 964 ft MSL in the Upstate South Carolina foothills, near the base of the Blue Ridge escarpment, produces IFR weather that differs from lower-elevation Carolina airports. The Blue Ridge Mountains to the northwest force moist air aloft, producing orographic cloud formation and elevated bases during southwest flow. Winter stratus layers associated with frontal overrunning are common from November through March.

Freezing rain is the most significant winter hazard at KGSP. When warm moist air overrides a cold surface layer entrenched in the Piedmont, precipitation falls as rain through the warm layer and refreezes on contact with surfaces below freezing. This produces severe icing on aircraft surfaces and reduces runway friction to near zero. The Aviation Weather Center icing forecasts and PIREPs from Charlotte Center are the best real-time data sources for icing conditions in the KGSP area.

Summer afternoons bring convective activity that initiates over the mountains and moves southeast toward the Piedmont. Pop-up cells can develop within 30 minutes and produce temporary below-minimums conditions at KGSP even when the morning forecast indicated VMC. Pilots departing KGSP on summer afternoons should have a clear plan for handling en route convection.

What should you expect on an instrument checkride at KGSP?

A checkride at KGSP places you in a Class C environment where radar separation is provided but the single runway concentrates all traffic. The DPE will assign one or both ILS approaches — most commonly ILS or LOC RWY 04 or ILS or LOC RWY 22 — and will evaluate your approach brief, aircraft configuration, and lateral/vertical tracking against ACS tolerances.

Because tower and approach hours end at 2345, the DPE will likely brief the checkride during hours when full ATC services are available. A meaningful oral discussion point is the difference in IFR operations during controlled versus uncontrolled airport hours: specifically, what changes when the tower closes, what frequency you use, and whether SVFR or special IFR is available at an uncontrolled airport.

CAT II-III approaches at KGSP are a natural oral topic. The DPE may ask what additional equipment, crew training, and aircraft authorization would be required to legally fly the ILS RWY 04 (CAT II-III) in lieu of the standard ILS. Under 14 CFR 91.175, the authorization requirements for CAT II and III operations go well beyond what a basic instrument rating confers.

BMW freighter traffic is a realistic traffic management topic. The DPE may ask how you would handle a wake turbulence caution issued by ATC when a B747 is 5 nm ahead on the ILS 22. Staying at or above the heavy's glidepath, landing past its touchdown point, and being prepared to execute a missed approach are the core techniques described in AIM 7-3.

Practice Questions

1. KGSP tower closes at 2345. You are planning an 0130 local IFR arrival. What changes in your planning and operations compared to an arrival during tower hours? What frequency do you use in the traffic pattern?

2. The DPE asks you to explain the difference between the ILS or LOC RWY 04 (CAT I), the ILS RWY 04 (SA CAT I), and the ILS RWY 04 (CAT II-III). What does each suffix and designation mean, and what do you legally need to fly each?

3. Greenville Approach assigns you the ILS or LOC RWY 22 and instructs: "Maintain 4,000 until established on the localizer, cleared ILS RWY 22 approach." At what point can you descend below 4,000, and what defines "established"?

4. A B747 freighter lands on Runway 04, 3 minutes before your ILS RWY 04 clearance. ATC does not issue a wake turbulence caution. What are you responsible for, and what technique do you use to avoid the wake?

5. Your aircraft is equipped for ILS approaches but not certified for CAT II operations. The published ILS or LOC RWY 04 DA is 200 ft and RVR 2,400. The CAT II DA is 100 ft and RVR 1,200. At what altitude must you execute a missed approach if you lose the required visual references on the CAT I approach?

Frequently Asked Questions

Q: What instrument approaches are published at KGSP?

KGSP has ILS or LOC approaches to Runways 04 and 22, plus a Special Authorization CAT I and a CAT II-III procedure for Runway 04. RNAV (GPS) approaches are published for Runways 04 and 22. The single runway pair (04/22) is 11,001 feet long — one of the longest at any Class C airport in the Carolinas.

Q: What is the airspace class at Greenville-Spartanburg?

KGSP operates inside Class C airspace. Under 14 CFR 91.130, two-way radio communication and an ATC clearance are required before entering the Class C veil. Greenville Approach controls IFR traffic on 118.8 MHz (west) and 119.4 MHz (east).

Q: How long is the runway at KGSP?

Runway 04/22 is 11,001 × 150 feet — the only runway at KGSP. Its length accommodates heavy transports operating into the adjacent BMW Manufacturing plant. ILS or LOC approaches are certified on both ends. Runway 04 additionally has CAT II-III capability.

Q: What are the communications frequencies at KGSP?

Tower is on 120.1 MHz (0600-2345), ATIS on 134.25 MHz, and ground on 121.9 MHz (0600-2345). Greenville Approach uses 118.8 MHz (west sector) and 119.4 MHz (east sector), also 0600-2345. Outside tower hours, pilots should file accordingly and expect no radar service.

Q: What weather should pilots expect at KGSP?

Greenville-Spartanburg sits at 964 ft MSL in the South Carolina Piedmont foothills near the Blue Ridge escarpment. Winter stratus and freezing rain are common December through February. Orographic lift from the nearby mountains produces elevated cloud bases and icing levels compared to lower-elevation airports in the region.

Q: Does KGSP have CAT II approaches?

Yes. The ILS RWY 04 (CAT II-III) and ILS RWY 04 (SA CAT I) are both published. CAT II/III operations require specific aircraft, crew, and airport certifications not required for a standard instrument rating checkride. The standard ILS or LOC RWY 04 is the CAT I procedure used in typical operations.

Sources

• AirNav — KGSP Airport Information
• SkyVector — KGSP 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
• Aviation Weather Center — Icing Forecasts

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 Editorial Team. Last updated: May 2026. If you spot an inaccuracy, email corrections@mockdpe.org.