Narrative:

Local training flight with CFI and instrument student. Practice VOR approach to gadsden. Unicom advised main runway 6/24 was closed for construction. Runway 36 in use at time. Advised unicom we'd do practice VOR approach to runway 6 and circle high to land on runway 36. Student following instruments to higher than normal circling minimums to avoid ground crew thinking we were landing. Called base, then final for runway 36 on CTAF/unicom. On short final, noticed large tandem axle dump truck traveling on runway 6 toward intersection with runway 36 which is approximately at midpoint of runway 36. As CFI, I was watching to see if truck was slowing. When it became evident he was not, I called for go around and watched the truck pass under us as we were 200-300 ft AGL. Obvious truck driver never looked. We had landing light on. Called unicom and advised them of incursion. Response was they were not a controled field. I asked him to pass incident along to ground crew and he was unable to reach them by radio. We were never in danger, but the ground vehicle should be looking for traffic and someone in crew monitoring radio. Suggest better training for ground construction crew.

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Original NASA ASRS Text

Title: A PA28 INSTRUCTOR AND STUDENT, WHILE LNDG AT GAD, ENCOUNTERED A GND VEHICLE ON THE RWY, EXECUTED A GAR.

Narrative: LCL TRAINING FLT WITH CFI AND INST STUDENT. PRACTICE VOR APCH TO GADSDEN. UNICOM ADVISED MAIN RWY 6/24 WAS CLOSED FOR CONSTRUCTION. RWY 36 IN USE AT TIME. ADVISED UNICOM WE'D DO PRACTICE VOR APCH TO RWY 6 AND CIRCLE HIGH TO LAND ON RWY 36. STUDENT FOLLOWING INSTS TO HIGHER THAN NORMAL CIRCLING MINIMUMS TO AVOID GND CREW THINKING WE WERE LNDG. CALLED BASE, THEN FINAL FOR RWY 36 ON CTAF/UNICOM. ON SHORT FINAL, NOTICED LARGE TANDEM AXLE DUMP TRUCK TRAVELING ON RWY 6 TOWARD INTXN WITH RWY 36 WHICH IS APPROX AT MIDPOINT OF RWY 36. AS CFI, I WAS WATCHING TO SEE IF TRUCK WAS SLOWING. WHEN IT BECAME EVIDENT HE WAS NOT, I CALLED FOR GAR AND WATCHED THE TRUCK PASS UNDER US AS WE WERE 200-300 FT AGL. OBVIOUS TRUCK DRIVER NEVER LOOKED. WE HAD LNDG LIGHT ON. CALLED UNICOM AND ADVISED THEM OF INCURSION. RESPONSE WAS THEY WERE NOT A CTLED FIELD. I ASKED HIM TO PASS INCIDENT ALONG TO GND CREW AND HE WAS UNABLE TO REACH THEM BY RADIO. WE WERE NEVER IN DANGER, BUT THE GND VEHICLE SHOULD BE LOOKING FOR TFC AND SOMEONE IN CREW MONITORING RADIO. SUGGEST BETTER TRAINING FOR GND CONSTRUCTION CREW.

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.