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Approach controller forgot to reselect the identify tag for a DHC6 causing less than standard separation with an HS25 when it descended through the DHC6's flight path en route to an adjacent airport.
| Attributes | |
| ACN | 492056 |
| Time | |
| Date | 200011 |
| Day | Thu |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | navaid : las.vortac |
| State Reference | NV |
| Altitude | msl single value : 3500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tracon : l30.tracon |
| Operator | general aviation : corporate |
| Make Model Name | Citation I |
| Navigation In Use | ils localizer & glide slope : 19r |
| Flight Phase | descent : approach |
| Route In Use | approach : traffic pattern approach : visual |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tracon : l30.tracon |
| Operator | common carrier : air taxi |
| Make Model Name | Twin Otter DHC-6 |
| Operating Under FAR Part | Part 135 |
| Navigation In Use | other |
| Flight Phase | descent : intermediate altitude |
| Route In Use | approach : visual |
| Flight Plan | VFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : radar pilot : multi engine pilot : instrument pilot : commercial |
| Experience | controller radar : 16 |
| ASRS Report | 492056 |
| Person 2 | |
| Affiliation | company : corporate |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : published procedure non adherence : required legal separation |
| Independent Detector | atc equipment other atc equipment : radar other controllera |
| Resolutory Action | none taken : detected after the fact |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 1400 vertical : 100 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
While working santa flight engineer position, I had a C500 on base to runway 19R. Its tag had already changed to a to tower symbol. Under the C500 was a DHC6 on a vgt tower symbol. I deselected the dhc tag so I could see the C500 tag, with the intention of reselecting the tag, clearing the C500 for approach shipped to tower. Following the C500 was an HS25. The HS25 reported the C500 in sight. I cleared him for approach. Having forgot to reselect the DHC6 tag, the HS25 descended through the DHC6. No traffic was given.
Original NASA ASRS Text
Title: APCH CTLR FORGOT TO RESELECT THE IDENT TAG FOR A DHC6 CAUSING LTSS WITH AN HS25 WHEN IT DSNDED THROUGH THE DHC6'S FLT PATH ENRTE TO AN ADJACENT ARPT.
Narrative: WHILE WORKING SANTA FE POS, I HAD A C500 ON BASE TO RWY 19R. ITS TAG HAD ALREADY CHANGED TO A TO TWR SYMBOL. UNDER THE C500 WAS A DHC6 ON A VGT TWR SYMBOL. I DESELECTED THE DHC TAG SO I COULD SEE THE C500 TAG, WITH THE INTENTION OF RESELECTING THE TAG, CLRING THE C500 FOR APCH SHIPPED TO TWR. FOLLOWING THE C500 WAS AN HS25. THE HS25 RPTED THE C500 IN SIGHT. I CLRED HIM FOR APCH. HAVING FORGOT TO RESELECT THE DHC6 TAG, THE HS25 DSNDED THROUGH THE DHC6. NO TFC WAS GIVEN.
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.