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Act approach controller working traffic in VFR holding pattern issued traffic, which was sighted by the pilot. The unknown aircraft descended through the holding area and disrupted the aircraft training in the holding pattern.
| Attributes | |
| ACN | 427405 |
| Time | |
| Date | 199902 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : cnw |
| State Reference | TX |
| Altitude | msl bound lower : 2700 msl bound upper : 2700 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | general aviation : personal |
| Make Model Name | Skyhawk 172/Cutlass 172 |
| Flight Phase | other |
| Flight Plan | VFR |
| Aircraft 2 | |
| Operator | general aviation : personal |
| Make Model Name | Commercial Fixed Wing |
| Flight Plan | VFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Experience | controller military : 6 controller radar : 3 flight time total : 6 |
| ASRS Report | 427405 |
| Person 2 | |
| Affiliation | Other |
| Function | flight crew : single pilot |
| Events | |
| Anomaly | conflict : airborne less severe other anomaly other |
| Independent Detector | atc equipment other atc equipment : unspecified other controllera other flight crewa |
| Resolutory Action | controller : issued new clearance other |
| Consequence | Other |
| Miss Distance | horizontal : 800 vertical : 100 |
| Supplementary | |
| Air Traffic Incident | other |
Narrative:
Aircraft X holding over rob. NDB for cnw was issued traffic 4 NM south northbound 3500 ft. The transponder on the inbound aircraft Y was intermittent. Traffic was observed by the aircraft X in holding the arriving aircraft Y (unknown) descended in the holding aircraft X's flight path and disrupted the holding maneuver alternate control instructions and holding instructions were issued along with another traffic advisory to the aircraft that was participating in the class D advisory service. Change the airspace to a class C. It would be much safer and pilot training would not be disrupted.
Original NASA ASRS Text
Title: ACT APCH CTLR WORKING TFC IN VFR HOLDING PATTERN ISSUED TFC, WHICH WAS SIGHTED BY THE PLT. THE UNKNOWN ACFT DSNDED THROUGH THE HOLDING AREA AND DISRUPTED THE ACFT TRAINING IN THE HOLDING PATTERN.
Narrative: ACFT X HOLDING OVER ROB. NDB FOR CNW WAS ISSUED TFC 4 NM S NBOUND 3500 FT. THE XPONDER ON THE INBOUND ACFT Y WAS INTERMITTENT. TFC WAS OBSERVED BY THE ACFT X IN HOLDING THE ARRIVING ACFT Y (UNKNOWN) DSNDED IN THE HOLDING ACFT X'S FLT PATH AND DISRUPTED THE HOLDING MANEUVER ALTERNATE CTL INSTRUCTIONS AND HOLDING INSTRUCTIONS WERE ISSUED ALONG WITH ANOTHER TFC ADVISORY TO THE ACFT THAT WAS PARTICIPATING IN THE CLASS D ADVISORY SVC. CHANGE THE AIRSPACE TO A CLASS C. IT WOULD BE MUCH SAFER AND PLT TRAINING WOULD NOT BE DISRUPTED.
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.