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Regional jet descended through an occupied altitude without a clearance resulting in loss of separation.
| Attributes | |
| ACN | 540088 |
| Time | |
| Date | 200202 |
| Day | Sun |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | navaid : ape.vortac |
| State Reference | OH |
| Altitude | msl bound lower : 19000 msl bound upper : 21000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zob.artcc tower : pdx.tower |
| Operator | common carrier : air carrier |
| Make Model Name | Regional Jet CL65, Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | descent : vacating altitude |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zob.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | Beech 1900 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar controller : developmental |
| Experience | controller non radar : 10 controller radar : 13 controller time certified in position1 : 2.5 |
| ASRS Report | 540088 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude conflict : airborne critical non adherence : clearance |
| Independent Detector | atc equipment : conflict alert other controllera other flight crewa other flight crewb |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 17040 vertical : 500 |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Aircraft X was confused and descended to FL190 without a clearance lower and descended through another aircraft's altitude.
Original NASA ASRS Text
Title: REGIONAL JET DSNDED THROUGH AN OCCUPIED ALT WITHOUT A CLRNC RESULTING IN LOSS OF SEPARATION.
Narrative: ACFT X WAS CONFUSED AND DSNDED TO FL190 WITHOUT A CLRNC LOWER AND DSNDED THROUGH ANOTHER ACFT'S ALT.
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.