Narrative:

I was on a training flight with a private pilot student working towards a commercial asel rating. We flew to a class D airport to practice landings. We requested and made an overhead approach to runway 14. On the right downwind to runway 14 tower cleared us to land. The student was manipulating the controls to practice a 'normal landing' before we proceeded to advanced landing techniques. Landing checklist was completed on the downwind; including 3 green lights indicated that the landing gear was down and locked.in the flare the nose wheel green light went out. At the same time the gear unsafe horn began to sound and the gear unsafe light came on. I took controls from the student and initiated a go-around. The main wheels touched the ground; but I was able to keep the nose wheel off the ground. I reported that we were going around due to a gear unsafe indication. The controller asked us to make right traffic for 14. I cycled the gear and put positive and negative g-forces on the gear by pitching up and down and rolling right and left. The gear lights remained on the entire time. I assessed that the gear was secure. We were cleared to land runway 14. On the landing roll the horn and light came on again. I rolled off the runway on to the taxiway holding full back pressure on the yoke for as long as possible. The nose came down without incident. We got a taxi clearance to the nearest parking space and tied the airplane down.the tower asked me to call them. They asked me to call the airport manager. I talked to the airport manager at length about the event; emphasizing that I took the only safe course of action I could under the circumstances.

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Original NASA ASRS Text

Title: A PA28R-200 flight instructor took control of the aircraft on touchdown when the nose gear green light extinguished and the gear warning horn activated. He aborted the landing and went around while exercising positive and negative Gs in at attempt to lock the gear in place. A subsequent landing; however; repeated the warnings although the nose gear stayed in place when it was lowered slowly to the runway.

Narrative: I was on a training flight with a private pilot student working towards a Commercial ASEL rating. We flew to a Class D airport to practice landings. We requested and made an overhead approach to Runway 14. On the right downwind to Runway 14 Tower cleared us to land. The student was manipulating the controls to practice a 'normal landing' before we proceeded to advanced landing techniques. Landing checklist was completed on the downwind; including 3 green lights indicated that the landing gear was down and locked.In the flare the nose wheel green light went out. At the same time the gear unsafe horn began to sound and the gear unsafe light came on. I took controls from the student and initiated a go-around. The main wheels touched the ground; but I was able to keep the nose wheel off the ground. I reported that we were going around due to a gear unsafe indication. The Controller asked us to make right traffic for 14. I cycled the gear and put positive and negative g-forces on the gear by pitching up and down and rolling right and left. The gear lights remained on the entire time. I assessed that the gear was secure. We were cleared to land Runway 14. On the landing roll the horn and light came on again. I rolled off the runway on to the taxiway holding full back pressure on the yoke for as long as possible. The nose came down without incident. We got a taxi clearance to the nearest parking space and tied the airplane down.The Tower asked me to call them. They asked me to call the airport manager. I talked to the Airport Manager at length about the event; emphasizing that I took the only safe course of action I could under the circumstances.

Data retrieved from NASA's ASRS site as of July 2013 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.