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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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Air carrier X descended thru the altitude of air carrier Y with less than standard separation. System error.
| Attributes | |
| ACN | 114746 |
| Time | |
| Date | 198906 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : loz |
| State Reference | KY |
| Altitude | msl bound lower : 29000 msl bound upper : 31000 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zid artcc : zdc |
| Operator | common carrier : air carrier |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Flight Phase | descent other |
| Route In Use | arrival other enroute airway : zid |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Flight Phase | cruise other |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : non radar |
| Qualification | controller : non radar |
| ASRS Report | 114746 |
| 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 | none taken : anomaly accepted other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Air carrier Y overflt at FL310 came into conflict with air carrier X in descent to nashville. Air carrier X was cleared to an altitude lower than air carrier Y but due to communication failure air carrier X did not receive expedite clearance.
Original NASA ASRS Text
Title: ACR X DESCENDED THRU THE ALT OF ACR Y WITH LESS THAN STANDARD SEPARATION. SYSTEM ERROR.
Narrative: ACR Y OVERFLT AT FL310 CAME INTO CONFLICT WITH ACR X IN DSCNT TO NASHVILLE. ACR X WAS CLRED TO AN ALT LOWER THAN ACR Y BUT DUE TO COM FAILURE ACR X DID NOT RECEIVE EXPEDITE CLRNC.
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.