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After clearing WX, aircraft Y was given a higher altitude and a direct routing. This conflicted with aircraft X, which was at the same altitude. Separation was lost.
| Attributes | |
| ACN | 441623 |
| Time | |
| Date | 199907 |
| Day | Thu |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | navaid : rod.vortac |
| State Reference | OH |
| Altitude | msl bound lower : 33000 msl bound upper : 35000 |
| Environment | |
| Flight Conditions | IMC |
| Weather Elements | Thunderstorm |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zid.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | DC-9 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zid.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | A319 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : enroute altitude change |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : handoff position |
| Qualification | controller : radar |
| Experience | controller non radar : 14 controller radar : 12 controller time certified in position1 : 13 |
| ASRS Report | 441623 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Events | |
| Anomaly | conflict : airborne less severe inflight encounter : weather non adherence : required legal separation |
| Independent Detector | atc equipment other atc equipment : error detection aircraft equipment : tcas other controllera |
| Resolutory Action | flight crew : took evasive action none taken : insufficient time |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 24000 vertical : 1200 |
| Supplementary | |
| Problem Areas | Weather ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Air carrier Y was deviating for WX and stopped climb at FL330 for traffic at FL350. Once clear, air carrier Y was climbed to FL350. Air carrier Y was finished deviation and was cleared direct stl. I don't think the radar controller realized, air carrier X was going to make a left turn at rod VOR into the path of air carrier Y. Separation was lost.
Original NASA ASRS Text
Title: AFTER CLRING WX, ACFT Y WAS GIVEN A HIGHER ALT AND A DIRECT ROUTING. THIS CONFLICTED WITH ACFT X, WHICH WAS AT THE SAME ALT. SEPARATION WAS LOST.
Narrative: ACR Y WAS DEVIATING FOR WX AND STOPPED CLB AT FL330 FOR TFC AT FL350. ONCE CLR, ACR Y WAS CLBED TO FL350. ACR Y WAS FINISHED DEV AND WAS CLRED DIRECT STL. I DON'T THINK THE RADAR CTLR REALIZED, ACR X WAS GOING TO MAKE A L TURN AT ROD VOR INTO THE PATH OF ACR Y. SEPARATION WAS LOST.
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.