Narrative:

The activities on sat were an open house at the control tower with visitors, in conjunction with springfield's annual firefall activities. I was briefed earlier in the day while working approach control, about a flight of 2 fgts coming VFR to sgf to make a low approach to runway 20 then turn to the east cross the final approach to runway 32 proceed east 5 mi then teardrop back to the right into final for runway 32. Prior to the intersection of runways 20 and 32 the fgts at taxiway north were to pull up and climb out VFR. All this was supposed to be done at an altitude of 1000 AGL. An small aircraft Y was providing rides to visitors at the airport all day. The 2 fgts made a low approach to runway 20. I instructed small aircraft Y to taxi into position and hold (wake turbulence delay). I heard him say he would wave it. I observed the 2 fgts turn east. I then cleared the small aircraft Y for takeoff. What happened, I'm told, is the 2 fgts turned right back into runway 32. All this was done within 2 mi from the airport. The backgnd noise (8-10) visitors in cabin attendant alerted me to look again. I observed the 2 fgts on short final for runway 32 with the small aircraft Y airborne and near the intersection. I coordinated with approach to inform them of the small aircraft Y position, but the frequency and landlines were congested. The 2 fgts pulled up prior to the intersection, however, they were approximately 50-100 ft above the ground, not the 1000 ft and missed the small aircraft Y which appeared to have crossed the intersection. Factors contributing: 1) 2 fgts not on my frequency, working approach. 2) improper briefing as to what will happen. 3) excessive speed, 2 fgts doing 400 KTS in air traffic area. 4) no waivers for this. 5) too many distractions, 8-10 visitors, much noise. 6) frequency and radar problems all day, speakers were on loudspeaker mode. These, I believe were the situations to make this occur. Suggestions to prevent a recurrence: 1) keep all aircraft on my frequency. 2) make certain aircraft know exactly what is to be done. 3) NOTAM, closure of the airport for these type maneuvers. 4) limit amount of visitors in tower cabin attendant, although we have a 5 maximum limit this was not adhered to.

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Original NASA ASRS Text

Title: NMAC IN ATA.

Narrative: THE ACTIVITIES ON SAT WERE AN OPEN HOUSE AT THE CTL TWR WITH VISITORS, IN CONJUNCTION WITH SPRINGFIELD'S ANNUAL FIREFALL ACTIVITIES. I WAS BRIEFED EARLIER IN THE DAY WHILE WORKING APCH CTL, ABOUT A FLT OF 2 FGTS COMING VFR TO SGF TO MAKE A LOW APCH TO RWY 20 THEN TURN TO THE E CROSS THE FINAL APCH TO RWY 32 PROCEED E 5 MI THEN TEARDROP BACK TO THE R INTO FINAL FOR RWY 32. PRIOR TO THE INTXN OF RWYS 20 AND 32 THE FGTS AT TAXIWAY N WERE TO PULL UP AND CLB OUT VFR. ALL THIS WAS SUPPOSED TO BE DONE AT AN ALT OF 1000 AGL. AN SMA Y WAS PROVIDING RIDES TO VISITORS AT THE ARPT ALL DAY. THE 2 FGTS MADE A LOW APCH TO RWY 20. I INSTRUCTED SMA Y TO TAXI INTO POS AND HOLD (WAKE TURB DELAY). I HEARD HIM SAY HE WOULD WAVE IT. I OBSERVED THE 2 FGTS TURN E. I THEN CLRED THE SMA Y FOR TKOF. WHAT HAPPENED, I'M TOLD, IS THE 2 FGTS TURNED R BACK INTO RWY 32. ALL THIS WAS DONE WITHIN 2 MI FROM THE ARPT. THE BACKGND NOISE (8-10) VISITORS IN CAB ALERTED ME TO LOOK AGAIN. I OBSERVED THE 2 FGTS ON SHORT FINAL FOR RWY 32 WITH THE SMA Y AIRBORNE AND NEAR THE INTXN. I COORDINATED WITH APCH TO INFORM THEM OF THE SMA Y POS, BUT THE FREQ AND LANDLINES WERE CONGESTED. THE 2 FGTS PULLED UP PRIOR TO THE INTXN, HOWEVER, THEY WERE APPROX 50-100 FT ABOVE THE GND, NOT THE 1000 FT AND MISSED THE SMA Y WHICH APPEARED TO HAVE CROSSED THE INTXN. FACTORS CONTRIBUTING: 1) 2 FGTS NOT ON MY FREQ, WORKING APCH. 2) IMPROPER BRIEFING AS TO WHAT WILL HAPPEN. 3) EXCESSIVE SPD, 2 FGTS DOING 400 KTS IN ATA. 4) NO WAIVERS FOR THIS. 5) TOO MANY DISTRACTIONS, 8-10 VISITORS, MUCH NOISE. 6) FREQ AND RADAR PROBLEMS ALL DAY, SPEAKERS WERE ON LOUDSPEAKER MODE. THESE, I BELIEVE WERE THE SITUATIONS TO MAKE THIS OCCUR. SUGGESTIONS TO PREVENT A RECURRENCE: 1) KEEP ALL ACFT ON MY FREQ. 2) MAKE CERTAIN ACFT KNOW EXACTLY WHAT IS TO BE DONE. 3) NOTAM, CLOSURE OF THE ARPT FOR THESE TYPE MANEUVERS. 4) LIMIT AMOUNT OF VISITORS IN TWR CAB, ALTHOUGH WE HAVE A 5 MAX LIMIT THIS WAS NOT ADHERED TO.

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.