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IFR G3 flight crew flies under and around previously departed VFR C172. Neither aircraft observed by tower local controller or traffic exchanged.
| Attributes | |
| ACN | 426969 |
| Time | |
| Date | 199901 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : dqo airport : ilg |
| State Reference | DE |
| Altitude | msl bound lower : 1500 msl bound upper : 2000 |
| Environment | |
| Flight Conditions | Marginal |
| Light | Daylight |
| Aircraft 1 | |
| Operator | general aviation : corporate |
| Make Model Name | Gulfstream III |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | departure other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | general aviation : personal |
| Make Model Name | Skyhawk 172/Cutlass 172 |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | departure other |
| Flight Plan | VFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : local |
| Experience | controller military : 5 controller radar : 15 |
| ASRS Report | 426969 |
| Person 2 | |
| Affiliation | Other |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : published procedure other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : insufficient time |
| Consequence | Other |
| Supplementary | |
| Air Traffic Incident | other |
Narrative:
An IFR G3 (X) departed runway 1 nwbound climbing to 2000 ft. A VFR C172 (Y) previously departed runway 9 nwbound and had not turned on the transponder or it was inoperative. The G3 passed below the cessna and reported the cessna in the pattern. Neither aircraft was in sight by the tower controller. Cause: poor visibility should have prompted the controller to ascertain the cessna's position, especially since a transponder wasn't acquired.
Original NASA ASRS Text
Title: IFR G3 FLC FLIES UNDER AND AROUND PREVIOUSLY DEPARTED VFR C172. NEITHER ACFT OBSERVED BY TWR LCL CTLR OR TFC EXCHANGED.
Narrative: AN IFR G3 (X) DEPARTED RWY 1 NWBOUND CLBING TO 2000 FT. A VFR C172 (Y) PREVIOUSLY DEPARTED RWY 9 NWBOUND AND HAD NOT TURNED ON THE XPONDER OR IT WAS INOP. THE G3 PASSED BELOW THE CESSNA AND RPTED THE CESSNA IN THE PATTERN. NEITHER ACFT WAS IN SIGHT BY THE TWR CTLR. CAUSE: POOR VISIBILITY SHOULD HAVE PROMPTED THE CTLR TO ASCERTAIN THE CESSNA'S POS, ESPECIALLY SINCE A XPONDER WASN'T ACQUIRED.
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.