Narrative:

I was working local control north and south at deer valley tower. I cleared small aircraft X for a touch and go on runway 7L. When small aircraft X was about 500-1000 ft from the runway end, small transport Y called tower and said where is this guy on final landing. I immediately told small aircraft X to make sure he was lined up for the runway. Small aircraft X immediately side stepped to the right and landed on the runway, he was first lined up for taxiway alpha while small aircraft Y was on taxiway alpha performing his runup. Once again it is impossible to tell from the tower if the airplanes are lined up for the runway. Thank god small aircraft Y spoke up because there is no displaced threshold on 7L and most planes land right on the numbers. In this case it could have been a terrible accident. My suggestion is a new control tower that is higher or relocated or extending the runway and taxiway and making a displaced threshold so if they do land on the taxiway it will be further down to avoid any collision with the planes running up on the taxiway.

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Original NASA ASRS Text

Title: SMA ON TAXIWAY ADVISES TWR THAT A LNDG SMA IS LINED UP FOR TAXIWAY INSTEAD OF RWY. TWR NOTIFIES LNDG ACFT.

Narrative: I WAS WORKING LCL CTL N AND S AT DEER VALLEY TWR. I CLRED SMA X FOR A TOUCH AND GO ON RWY 7L. WHEN SMA X WAS ABOUT 500-1000 FT FROM THE RWY END, SMT Y CALLED TWR AND SAID WHERE IS THIS GUY ON FINAL LNDG. I IMMEDIATELY TOLD SMA X TO MAKE SURE HE WAS LINED UP FOR THE RWY. SMA X IMMEDIATELY SIDE STEPPED TO THE R AND LANDED ON THE RWY, HE WAS FIRST LINED UP FOR TAXIWAY ALPHA WHILE SMA Y WAS ON TAXIWAY ALPHA PERFORMING HIS RUNUP. ONCE AGAIN IT IS IMPOSSIBLE TO TELL FROM THE TWR IF THE AIRPLANES ARE LINED UP FOR THE RWY. THANK GOD SMA Y SPOKE UP BECAUSE THERE IS NO DISPLACED THRESHOLD ON 7L AND MOST PLANES LAND RIGHT ON THE NUMBERS. IN THIS CASE IT COULD HAVE BEEN A TERRIBLE ACCIDENT. MY SUGGESTION IS A NEW CTL TWR THAT IS HIGHER OR RELOCATED OR EXTENDING THE RWY AND TAXIWAY AND MAKING A DISPLACED THRESHOLD SO IF THEY DO LAND ON THE TAXIWAY IT WILL BE FURTHER DOWN TO AVOID ANY COLLISION WITH THE PLANES RUNNING UP ON THE TAXIWAY.

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.