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Operational error less than standard separation when climbing E120 conflicts with VFR DH6 in class B airspace. The E120 was on departure frequency and the DH6 on approach frequency. Near midair collision reported by reporter.
| Attributes | |
| ACN | 375480 |
| Time | |
| Date | 199707 |
| Day | Mon |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : las |
| State Reference | NV |
| Altitude | msl bound lower : 5500 msl bound upper : 5500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : las tracon : cmh |
| Operator | common carrier : air carrier |
| Make Model Name | Twin Otter DHC-6 |
| Operating Under FAR Part | Part 135 |
| Flight Phase | cruise other |
| Route In Use | enroute : on vectors |
| Flight Plan | VFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Xingu EMB-121 All Series |
| Operating Under FAR Part | Part 135 |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | departure sid : sid |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : radar |
| Experience | controller radar : 12 controller supervisory : 1 |
| ASRS Report | 375480 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : departure |
| Qualification | controller : radar |
| Events | |
| Anomaly | conflict : nmac non adherence : published procedure non adherence : required legal separation |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance other |
| Consequence | Other |
| Miss Distance | horizontal : 1280 vertical : 0 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
The VFR DH6 was transitioning the las class B airspace. The receiving controller had control to turn and climb the DH6. The DH6 was cleared to climb to 5500 ft and was level when the E120 on a red rock departure SID was observed on a converging course climbing through 5000 ft. The E120 was on the departure sector's frequency. Visual separation was not used in a timely manner. This receiving controller observed the E120 climbing above 5000 ft and initiated a conflict alert and recommended evasive actions.
Original NASA ASRS Text
Title: OPERROR LTSS WHEN CLBING E120 CONFLICTS WITH VFR DH6 IN CLASS B AIRSPACE. THE E120 WAS ON DEP FREQ AND THE DH6 ON APCH FREQ. NMAC RPTED BY RPTR.
Narrative: THE VFR DH6 WAS TRANSITIONING THE LAS CLASS B AIRSPACE. THE RECEIVING CTLR HAD CTL TO TURN AND CLB THE DH6. THE DH6 WAS CLRED TO CLB TO 5500 FT AND WAS LEVEL WHEN THE E120 ON A RED ROCK DEP SID WAS OBSERVED ON A CONVERGING COURSE CLBING THROUGH 5000 FT. THE E120 WAS ON THE DEP SECTOR'S FREQ. VISUAL SEPARATION WAS NOT USED IN A TIMELY MANNER. THIS RECEIVING CTLR OBSERVED THE E120 CLBING ABOVE 5000 FT AND INITIATED A CONFLICT ALERT AND RECOMMENDED EVASIVE ACTIONS.
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.