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Reported loss of separation between a C650 descending and maintaining visual separation with a climbing MD88 when the MD88 passed through FL180 prior to the C650 passing through 17000 ft.
| Attributes | |
| ACN | 398779 |
| Time | |
| Date | 199803 |
| Day | Tue |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : rdu |
| State Reference | NC |
| Altitude | msl bound lower : 18000 msl bound upper : 18000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdc |
| Operator | common carrier : air carrier |
| Make Model Name | MD-88 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | general aviation : personal |
| Make Model Name | Citation III, VI, VII |
| Operating Under FAR Part | Part 91 |
| Flight Phase | descent other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | other personnel other |
| Qualification | controller : radar |
| Experience | controller radar : 18 |
| ASRS Report | 398779 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : published procedure non adherence : required legal separation other anomaly other |
| Independent Detector | other other : unspecified |
| Resolutory Action | none taken : detected after the fact |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 18600 vertical : 200 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
MD88 was a rdu departure wswbound and issued a climb to 16000 ft. C650 was a clt lander in a descent for 17000 ft, also wswbound, leaving FL238. C650 reported having the MD88 in sight and was issued a visual descent clearance to 16000 ft. At this time C650 was leaving FL200. MD88 was then informed that the C650 had them in sight and was executing a visual descent. The MD88 was then issued a climb to FL230. Separation was lost when the MD88 climbed through FL180 prior to the C650 descending through 17000 ft.
Original NASA ASRS Text
Title: RPTED LOSS OF SEPARATION BTWN A C650 DSNDING AND MAINTAINING VISUAL SEPARATION WITH A CLBING MD88 WHEN THE MD88 PASSED THROUGH FL180 PRIOR TO THE C650 PASSING THROUGH 17000 FT.
Narrative: MD88 WAS A RDU DEP WSWBOUND AND ISSUED A CLB TO 16000 FT. C650 WAS A CLT LANDER IN A DSCNT FOR 17000 FT, ALSO WSWBOUND, LEAVING FL238. C650 RPTED HAVING THE MD88 IN SIGHT AND WAS ISSUED A VISUAL DSCNT CLRNC TO 16000 FT. AT THIS TIME C650 WAS LEAVING FL200. MD88 WAS THEN INFORMED THAT THE C650 HAD THEM IN SIGHT AND WAS EXECUTING A VISUAL DSCNT. THE MD88 WAS THEN ISSUED A CLB TO FL230. SEPARATION WAS LOST WHEN THE MD88 CLBED THROUGH FL180 PRIOR TO THE C650 DSNDING THROUGH 17000 FT.
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.