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Less than standard separation when air carrier-large transport cleared through altitude of cpr-light transport.
| Attributes | |
| ACN | 80692 |
| Time | |
| Date | 198801 |
| Day | Sun |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : sdz |
| State Reference | NC |
| Altitude | msl bound lower : 37000 msl bound upper : 38700 |
| Environment | |
| Flight Conditions | VMC |
| Light | Dusk |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdc |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | general aviation : corporate |
| Make Model Name | Light Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | cruise other |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller non radar : 3 controller radar : 12 |
| ASRS Report | 80692 |
| Person 2 | |
| 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 | controller : issued new clearance none taken : insufficient time |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 26400 vertical : 1700 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Large transport X encountered moderate turbulence at FL350 and requested FL390. Light transport Y was traffic at FL370. I turned large transport X to a heading of 210 degrees to miss traffic and climb. After large transport X was established on 210 degree heading, I gave climb clearance to large transport X to FL390. I realized that this was not sufficient to clear traffic. Light transport Y was given a left turn to fly a heading of 050 degrees then 030 degrees. The aircraft passed with approximately 4.4 mi latitude sep and 1700' (approximately) vertical sep.
Original NASA ASRS Text
Title: LESS THAN STANDARD SEPARATION WHEN ACR-LGT CLEARED THROUGH ALT OF CPR-LTT.
Narrative: LGT X ENCOUNTERED MODERATE TURB AT FL350 AND REQUESTED FL390. LTT Y WAS TFC AT FL370. I TURNED LGT X TO A HDG OF 210 DEGS TO MISS TFC AND CLB. AFTER LGT X WAS ESTABLISHED ON 210 DEG HDG, I GAVE CLB CLRNC TO LGT X TO FL390. I REALIZED THAT THIS WAS NOT SUFFICIENT TO CLR TFC. LTT Y WAS GIVEN A LEFT TURN TO FLY A HDG OF 050 DEGS THEN 030 DEGS. THE ACFT PASSED WITH APPROX 4.4 MI LAT SEP AND 1700' (APPROX) VERT SEP.
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.