North Texas Regional Airport Perrin Field traffic pattern

Pattern altitude at North Texas Regional Airport Perrin Field (GYI · KGYI · PNX) is 1,700 ft MSL (≈1,000 AGL) by the standard convention — none is published for this field, and every runway end is standard left traffic.

All of North Texas Regional Airport Perrin Field — runways, frequencies, charts and live weather

Pattern diagram

Drawn to scale from the FAA NASR runway alignments and the per end right traffic flags — pick a runway to see its pattern. Live wind picks the favored runway when KGYI reports it.

RWY 18LLEFT traffic

Heading: 179° mag · 182° true
Dimensions: 9,000 × 150 ft
TPA: 1,700 ft MSL (≈1,000 AGL) · standard
Surface: ASPH-CONC
Lights: VASI (3°) + MALSR
ILS: ILS · CAT I · LOC 111.7 (GYI) · GS 3.00°
CTAF: 120.575

More details — RWY 18L

Threshold elev: 741 ft
Markings: precision
Approach obstacle: Trees, 20 ft, 700 ft from threshold, 400 ft L of centerline — 25:1 slope to clear
Threshold crossing height: 48 ft
TDZ elevation: 741 ft

Condition: Good. Edge lights: Med. Weight bearing: Single wheel 125k, Double wheel 189k, Dual tandem 326k. PCN 54.

Pattern side: FAA NASR · TPA standard 1,000 ft AGL (not charted) · layout: FAA runway-end coordinates

Pattern direction by runway

Runway	Pattern	Heading	Pattern altitude
18L	Left traffic	179° mag	1,700 ft MSL (≈1,000 AGL)
36R	Left traffic	359° mag	1,700 ft MSL (≈1,000 AGL)
18R	Left traffic	179° mag	1,700 ft MSL (≈1,000 AGL)
36L	Left traffic	359° mag	1,700 ft MSL (≈1,000 AGL)

No pattern altitude is published for KGYI; the figure above is the AC 90-66B 1,000 ft AGL convention for propeller aircraft, rounded to the field. Turbine aircraft normally fly 1,500 ft AGL. Headings are the runway alignment; downwind is the reciprocal.

Flying the pattern at KGYI

North Texas Regional Airport Perrin Field is towered, working 120.575. Contact the tower before entering the surface area and fly the pattern you are assigned — the directions below are the charted default when no instruction is given.

All ends are left traffic, which is the FAR 91.126 default — turns to the left unless the field charts otherwise. The full entry procedure is here →

Frequently asked

What is the traffic pattern altitude at KGYI?

North Texas Regional Airport Perrin Field has no traffic pattern altitude published in the FAA NASR data. The AC 90-66B convention for propeller aircraft is 1,000 ft AGL, which works out to roughly 1,700 ft MSL (≈1,000 AGL) here — but confirm it against the Chart Supplement before you fly, since a field can have a non standard pattern altitude that NASR does not carry.

Does KGYI have right traffic?

No. All 4 runway ends at North Texas Regional Airport Perrin Field use standard left traffic, so no right pattern is charted here.

Do I fly a standard pattern at KGYI?

North Texas Regional Airport Perrin Field is towered (120.575), so the pattern shown here is the charted default — but the controller's instruction overrides it. Expect straight in approaches, base entries and midfield crossings as traffic dictates.

More about KGYI

Pattern direction and alignment are drawn from the FAA NASR (28-day cycle); the diagram is generated, not an FAA chart. Pattern altitude is shown as published where NASR carries one, otherwise as the AC 90-66B 1,000 ft AGL convention. For planning and education only; always verify against the Chart Supplement.