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Departure controller climbed medium large transport to altitude that large transport had just vacated, with less than standard separation.
| Attributes | |
| ACN | 181789 |
| Time | |
| Date | 199106 |
| Day | Mon |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : bal airport : bwi airport : iad |
| State Reference | MD |
| Altitude | msl bound lower : 9300 msl bound upper : 10100 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : bwi |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | enroute airway : dca |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : departure |
| Qualification | controller : radar |
| ASRS Report | 181789 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| 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 : 12000 vertical : 700 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Large transport X is an iad departure eastbound to phl. Medium large transport Y is a bwi departure wbound. Large transport X mode C observed leaving 10100. Medium large transport Y climbed earlier to 10000 but only observed through 8900. After large transport X went through 10100 medium large transport Y was reissued 10000.
Original NASA ASRS Text
Title: DEP CTLR CLBED MLG TO ALT THAT LGT HAD JUST VACATED, WITH LTSS.
Narrative: LGT X IS AN IAD DEP EBOUND TO PHL. MLG Y IS A BWI DEP WBOUND. LGT X MODE C OBSERVED LEAVING 10100. MLG Y CLBED EARLIER TO 10000 BUT ONLY OBSERVED THROUGH 8900. AFTER LGT X WENT THROUGH 10100 MLG Y WAS REISSUED 10000.
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.