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Less than standard separation between corp X nwbound descending to FL310 and unknown Y eastbound climbing to FL330. Controller B requested controller a to stop the descent of corp X at FL350. The amended altitude clearance was not issued to corp X.
| Attributes | |
| ACN | 326371 |
| Time | |
| Date | 199601 |
| Day | Wed |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : ape |
| State Reference | OH |
| Altitude | msl bound lower : 33500 msl bound upper : 35000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zid |
| Operator | general aviation : corporate |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Operating Under FAR Part | Part 91 |
| Flight Phase | descent other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Operating Under FAR Part | other : unknown |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller non radar : 4 controller radar : 5 |
| ASRS Report | 326371 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Events | |
| Anomaly | non adherence : required legal separation non adherence : published procedure |
| Independent Detector | other controllera |
| Resolutory Action | none taken : detected after the fact none taken : anomaly accepted |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 16200 vertical : 1200 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Corp X was nwbound at FL390 with descent clearance to FL310. Aircraft Y was eastbound and climbing to FL330. The controller working aircraft Y called the controller working corp X and requested that they stop him at FL350 due to traffic. The amended clearance was not issued and separation was lost.
Original NASA ASRS Text
Title: LTSS BTWN CORP X NWBOUND DSNDING TO FL310 AND UNKNOWN Y EBOUND CLBING TO FL330. CTLR B REQUESTED CTLR A TO STOP THE DSCNT OF CORP X AT FL350. THE AMENDED ALT CLRNC WAS NOT ISSUED TO CORP X.
Narrative: CORP X WAS NWBOUND AT FL390 WITH DSCNT CLRNC TO FL310. ACFT Y WAS EBOUND AND CLBING TO FL330. THE CTLR WORKING ACFT Y CALLED THE CTLR WORKING CORP X AND REQUESTED THAT THEY STOP HIM AT FL350 DUE TO TFC. THE AMENDED CLRNC WAS NOT ISSUED AND 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.