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Approach controller had less than standard separation between opposite direction traffic, one small transport descending to altitude of other.
| Attributes | |
| ACN | 84010 |
| Time | |
| Date | 198802 |
| Day | Tue |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : iad |
| State Reference | VA |
| Altitude | msl bound lower : 4000 msl bound upper : 4000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | general aviation : corporate |
| Make Model Name | Small Transport |
| Flight Phase | descent other |
| Route In Use | enroute : on vectors enroute airway : iad |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | general aviation : corporate |
| Make Model Name | Small Transport, Low Wing, 2 Turboprop Eng |
| Flight Phase | cruise other descent other |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : radar |
| ASRS Report | 84010 |
| Person 2 | |
| Function | flight crew : single pilot |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation |
| Independent Detector | atc equipment other atc equipment : unspecified other controllera |
| Resolutory Action | none taken : anomaly accepted |
| Consequence | Other |
| Miss Distance | horizontal : 3000 vertical : 500 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Small transport X radar vector heading 090 degrees at 4000' (descending), landing baltimore. Small transport Y radar vector heading 270 degrees descending to 4000'. Landing dulles. I advised small transport Y to expect lower and turn in 7 mi to get under opp direction 4000' in about 7 mi. I diverted my attention to a visual approach to martinsburg, wv, reference a practice IFR ILS 26 approach.
Original NASA ASRS Text
Title: APCH CTLR HAD LESS THAN STANDARD SEPARATION BETWEEN OPPOSITE DIRECTION TRAFFIC, ONE SMT DESCENDING TO ALT OF OTHER.
Narrative: SMT X RADAR VECTOR HDG 090 DEGS AT 4000' (DSNDING), LNDG BALTIMORE. SMT Y RADAR VECTOR HDG 270 DEGS DSNDING TO 4000'. LNDG DULLES. I ADVISED SMT Y TO EXPECT LOWER AND TURN IN 7 MI TO GET UNDER OPP DIRECTION 4000' IN ABOUT 7 MI. I DIVERTED MY ATTN TO A VISUAL APCH TO MARTINSBURG, WV, REF A PRACTICE IFR ILS 26 APCH.
Data retrieved from NASA's ASRS site as of August 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.