Narrative:

The student and I were practicing landings at johnston county regional airport (jnx). We had already had multiple landings and laps in the traffic pattern; reporting our position within the traffic pattern on each phase (crosswind; downwind; base; and final). We turned left base for runway 21 and reported our position on the jnx CTAF. Approximately 10 seconds after turning final for runway 21; a piper cherokee announced it was departing runway 21 and proceeded to cross the runway hold short line when we were on short final; approximately 300 feet AGL; and less than 1 mile from the runway. I immediately initiated a go-around and announced the go-around on the jnx CTAF. The piper stopped where it was on the taxiway; announcing we could still land and that he would hold short where he was; however we continued with our go-around due to the fact that he had already crossed over the hold short lines into the runway environment. I believe that monitoring a CTAF while taxiing at an uncontrolled airport to make one aware of any additional traffic in the airport environment; along with looking at both the runway; final approach; and base legs of the traffic pattern before proceeding into the runway environment can help prevent actual or potential runway incursions. I believe it was a lack of situational awareness or utilization of the CTAF on the ground that caused the cherokee to attempt to take off without checking to see if the final approach was clear.

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Original NASA ASRS Text

Title: DA-20 flight instructor reported executing a go-around when a Cherokee crossed the hold-short line of the runway they were landing on.

Narrative: The student and I were practicing landings at Johnston County Regional Airport (JNX). We had already had multiple landings and laps in the traffic pattern; reporting our position within the traffic pattern on each phase (crosswind; downwind; base; and final). We turned left base for runway 21 and reported our position on the JNX CTAF. Approximately 10 seconds after turning final for runway 21; a Piper Cherokee announced it was departing runway 21 and proceeded to cross the runway hold short line when we were on short final; approximately 300 feet AGL; and less than 1 mile from the runway. I immediately initiated a go-around and announced the go-around on the JNX CTAF. The Piper stopped where it was on the taxiway; announcing we could still land and that he would hold short where he was; however we continued with our go-around due to the fact that he had already crossed over the hold short lines into the runway environment. I believe that monitoring a CTAF while taxiing at an uncontrolled airport to make one aware of any additional traffic in the airport environment; along with looking at both the runway; final approach; and base legs of the traffic pattern before proceeding into the runway environment can help prevent actual or potential runway incursions. I believe it was a lack of situational awareness or utilization of the CTAF on the ground that caused the Cherokee to attempt to take off without checking to see if the final approach was clear.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.