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Air carrier X descent through occupied altitude, had less than standard separation from air carrier Y. System error.
| Attributes | |
| ACN | 252105 |
| Time | |
| Date | 199309 |
| Day | Mon |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : ape |
| State Reference | OH |
| Altitude | msl bound lower : 29000 msl bound upper : 33000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zid |
| Operator | common carrier : air carrier |
| Make Model Name | Widebody Transport |
| Navigation In Use | Other Other |
| Flight Phase | descent other |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Widebody, Low Wing, 3 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | cruise other |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller radar : 10 |
| ASRS Report | 252105 |
| 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 non adherence : published procedure |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance other |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 21000 vertical : 1400 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Air carrier X descended to FL290, appeared to be passing south of air carrier Y FL310. After realizing traffic situation air carrier Y was turned to 360 degree heading, air carrier X turned to 180 degree heading. Separation was lost. A lot of personal items affected me today. I considered using sick leave due to the fact I felt incapacitated to perform ATC duties, but, due to the previous attempt to issue a facility-wide sick leave usage letter, I felt compelled to work anyway.
Original NASA ASRS Text
Title: ACR X DSCNT THROUGH OCCUPIED ALT, HAD LTSS FROM ACR Y. SYS ERROR.
Narrative: ACR X DSNDED TO FL290, APPEARED TO BE PASSING S OF ACR Y FL310. AFTER REALIZING TFC SIT ACR Y WAS TURNED TO 360 DEG HDG, ACR X TURNED TO 180 DEG HDG. SEPARATION WAS LOST. A LOT OF PERSONAL ITEMS AFFECTED ME TODAY. I CONSIDERED USING SICK LEAVE DUE TO THE FACT I FELT INCAPACITATED TO PERFORM ATC DUTIES, BUT, DUE TO THE PREVIOUS ATTEMPT TO ISSUE A FACILITY-WIDE SICK LEAVE USAGE LETTER, I FELT COMPELLED TO WORK ANYWAY.
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.