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2 GA aircraft, 1 VFR and the other IFR get close causing the conflict alert feature to alarm. Controller blames unreadable radio equipment for part of the problem.
| Attributes | |
| ACN | 333339 |
| Time | |
| Date | 199604 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : mcn |
| State Reference | GA |
| Altitude | msl bound lower : 4200 msl bound upper : 4500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | general aviation : personal |
| Make Model Name | Cessna 180 Skywagon |
| Operating Under FAR Part | Part 91 |
| Navigation In Use | other vortac |
| Flight Phase | cruise other |
| Flight Plan | VFR |
| Aircraft 2 | |
| Operator | general aviation : personal |
| Make Model Name | Cessna 210 Centurion / Turbo Centurion 210C, 210D |
| Operating Under FAR Part | Part 91 |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : radar |
| Experience | controller radar : 14 flight time total : 600 |
| ASRS Report | 333339 |
| Person 2 | |
| Affiliation | Other |
| Function | flight crew : single pilot |
| Qualification | pilot : private |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : far other anomaly other |
| Independent Detector | atc equipment other atc equipment : unspecified other controllera |
| Resolutory Action | none taken : anomaly accepted |
| Consequence | Other |
| Miss Distance | horizontal : 1500 vertical : 300 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | other |
| Situations | |
| Navigational Aid | Unspecified |
Narrative:
Aircraft X, flight of 3 C180's, called me. I thought aircraft X was at 6500 ft. I radar idented aircraft X then I found out aircraft X was at 4500 ft. I tried to advise the controller who owned 4500 ft. The conflict alert went off with aircraft Y, a C210 climbing by aircraft X. (The frequency being used -- 119.6, has been reported unreadable) with ucrs filed for the stvs communication system for a month. The macon RAPCON stvs communication system is being used to control live traffic but the system has never be certified. Multiple ucrs have been filed.
Original NASA ASRS Text
Title: 2 GA ACFT, 1 VFR AND THE OTHER IFR GET CLOSE CAUSING THE CONFLICT ALERT FEATURE TO ALARM. CTLR BLAMES UNREADABLE RADIO EQUIP FOR PART OF THE PROB.
Narrative: ACFT X, FLT OF 3 C180'S, CALLED ME. I THOUGHT ACFT X WAS AT 6500 FT. I RADAR IDENTED ACFT X THEN I FOUND OUT ACFT X WAS AT 4500 FT. I TRIED TO ADVISE THE CTLR WHO OWNED 4500 FT. THE CONFLICT ALERT WENT OFF WITH ACFT Y, A C210 CLBING BY ACFT X. (THE FREQ BEING USED -- 119.6, HAS BEEN RPTED UNREADABLE) WITH UCRS FILED FOR THE STVS COM SYS FOR A MONTH. THE MACON RAPCON STVS COM SYS IS BEING USED TO CTL LIVE TFC BUT THE SYS HAS NEVER BE CERTIFIED. MULTIPLE UCRS HAVE BEEN FILED.
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.