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Less than standard separation between air carrier-large transport southbound on J174 and air carrier-large transport opposite direction at same altitude.
| Attributes | |
| ACN | 92496 |
| Time | |
| Date | 198808 |
| Day | Tue |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : diw |
| State Reference | NC |
| Altitude | msl bound lower : 31000 msl bound upper : 31000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdc tower : mdw |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | cruise other |
| Route In Use | enroute airway : zdc |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller non radar : 1 controller radar : 18 flight time last 90 days : 20 flight time total : 1180 |
| ASRS Report | 92496 |
| 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 | controller : issued new clearance none taken : insufficient time other |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 25800 vertical : 0 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Large transport X vectored to avoid large transport Y and large transport Z did not turn aircraft soon enough. Callback conversation with reporter revealed the following: air carrier large transport X was southbound on J174. Air carrier large transport Y and large transport Z were northeast bound on J174 to ilm then J191 northbound. Large transport Z was in the lead and the only aircraft to conflict with large transport X. Reporter contended that when he gave the southbound large transport X the turn to save the sep, it was in time to do the job, but large transport X was slow to start the turn. The subsequent investigation did not bear this out. Traffic was characterized by reporter as light at the time of incident.
Original NASA ASRS Text
Title: LESS THAN STANDARD SEPARATION BETWEEN ACR-LGT SOUTHBOUND ON J174 AND ACR-LGT OPPOSITE DIRECTION AT SAME ALT.
Narrative: LGT X VECTORED TO AVOID LGT Y AND LGT Z DID NOT TURN ACFT SOON ENOUGH. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING: ACR LGT X WAS SBND ON J174. ACR LGT Y AND LGT Z WERE NE BOUND ON J174 TO ILM THEN J191 NBND. LGT Z WAS IN THE LEAD AND THE ONLY ACFT TO CONFLICT WITH LGT X. RPTR CONTENDED THAT WHEN HE GAVE THE SBND LGT X THE TURN TO SAVE THE SEP, IT WAS IN TIME TO DO THE JOB, BUT LGT X WAS SLOW TO START THE TURN. THE SUBSEQUENT INVESTIGATION DID NOT BEAR THIS OUT. TFC WAS CHARACTERIZED BY RPTR AS LIGHT AT THE TIME OF INCIDENT.
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.