 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Controller descends an air carrier through an occupied altitude resulting in less than standard separation.
| Attributes | |
| ACN | 325222 |
| Time | |
| Date | 199601 |
| Day | Sat |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : cap |
| State Reference | IL |
| Altitude | msl bound lower : 33000 msl bound upper : 33000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Dawn |
| Aircraft 1 | |
| Controlling Facilities | artcc : zau |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | descent other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller military : 3 controller non radar : 8 controller radar : 8 |
| ASRS Report | 325222 |
| 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 | atc equipment other atc equipment : unspecified other controllera |
| Resolutory Action | controller : issued new clearance |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 12000 vertical : 800 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Aircraft a at FL330 northbound from cap to ord descended to FL240. Aircraft B, an MD80 at FL310, wbound, 20 mi north of cap. Conflict not idented until 4 mi and 1200 ft. Action taken resulted in 2 mi and 800 ft.
Original NASA ASRS Text
Title: CTLR DSNDS AN ACR THROUGH AN OCCUPIED ALT RESULTING IN LTSS.
Narrative: ACFT A AT FL330 NBOUND FROM CAP TO ORD DSNDED TO FL240. ACFT B, AN MD80 AT FL310, WBOUND, 20 MI N OF CAP. CONFLICT NOT IDENTED UNTIL 4 MI AND 1200 FT. ACTION TAKEN RESULTED IN 2 MI AND 800 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.