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Small aircraft came in close proximity to another aircraft resulting in less than standard separation. Erroneous clearance and hearback blamed.
| Attributes | |
| ACN | 149662 |
| Time | |
| Date | 199007 |
| Day | Sun |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : sfo |
| State Reference | CA |
| Altitude | msl bound lower : 15000 msl bound upper : 15000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zoa |
| Operator | common carrier : air carrier |
| Make Model Name | Small Transport, Low Wing, 2 Turboprop Eng |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : developmental |
| Experience | controller military : 6 |
| ASRS Report | 149662 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| 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 | none taken : anomaly accepted |
| Consequence | Other |
| Miss Distance | horizontal : 9000 vertical : 500 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Controller said something that he did not know he said. Pilot read back the clearance and the controller did not catch the mistake.
Original NASA ASRS Text
Title: SMA CAME IN CLOSE PROX TO ANOTHER ACFT RESULTING IN LESS THAN STANDARD SEPARATION. ERRONEOUS CLRNC AND HEARBACK BLAMED.
Narrative: CTLR SAID SOMETHING THAT HE DID NOT KNOW HE SAID. PLT READ BACK THE CLRNC AND THE CTLR DID NOT CATCH THE MISTAKE.
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.