Narrative:

Just after turning final 1 mi from runway 17 at 1300 MSL dto, tx, a departing aircraft pulled into position for takeoff and held. This aircraft started rolling, but the acceleration appeared to be slow, and I advised the pilot that we might have to break off the approach. The pilot was also watching the aircraft and started making small s-turns to gain separation and improve visibility. Just as I informed the pilot that the aircraft was clear of the runway, he applied power. I saw an approach light on my left. There was a thump and vibrating indicating a propeller strike. The aircraft was landed without further incident. The tandem seat aircraft did not afford good forward visibility for the pilot and at the time I thought he was flying the approach and relying on my assessment of the runway situation. As it turned out, he had fixated on the aircraft on the runway to the detriment of the approach and allowed the aircraft to get too low with 1/4 mi (approximately) to go to touchdown.

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Original NASA ASRS Text

Title: AN SMA HIT AN APCH LIGHT ON APCH TO LNDG. THERE WAS NO DAMAGE RPTED, OTHER THAN THE PROP, AND NO INJURIES.

Narrative: JUST AFTER TURNING FINAL 1 MI FROM RWY 17 AT 1300 MSL DTO, TX, A DEPARTING ACFT PULLED INTO POS FOR TKOF AND HELD. THIS ACFT STARTED ROLLING, BUT THE ACCELERATION APPEARED TO BE SLOW, AND I ADVISED THE PLT THAT WE MIGHT HAVE TO BREAK OFF THE APCH. THE PLT WAS ALSO WATCHING THE ACFT AND STARTED MAKING SMALL S-TURNS TO GAIN SEPARATION AND IMPROVE VISIBILITY. JUST AS I INFORMED THE PLT THAT THE ACFT WAS CLR OF THE RWY, HE APPLIED PWR. I SAW AN APCH LIGHT ON MY L. THERE WAS A THUMP AND VIBRATING INDICATING A PROP STRIKE. THE ACFT WAS LANDED WITHOUT FURTHER INCIDENT. THE TANDEM SEAT ACFT DID NOT AFFORD GOOD FORWARD VISIBILITY FOR THE PLT AND AT THE TIME I THOUGHT HE WAS FLYING THE APCH AND RELYING ON MY ASSESSMENT OF THE RWY SITUATION. AS IT TURNED OUT, HE HAD FIXATED ON THE ACFT ON THE RWY TO THE DETRIMENT OF THE APCH AND ALLOWED THE ACFT TO GET TOO LOW WITH 1/4 MI (APPROX) TO GO TO TOUCHDOWN.

Data retrieved from NASA's ASRS site as of July 2007 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.