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Controller gives wrong heading to descending commuter aircraft resulting in less than standard separation.
| Attributes | |
| ACN | 256909 |
| Time | |
| Date | 199311 |
| Day | Wed |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : mqg |
| State Reference | ID |
| Altitude | msl bound lower : 12000 msl bound upper : 12000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tower : grb |
| Operator | common carrier : air carrier |
| Make Model Name | Small Transport, Low Wing, 2 Turboprop Eng |
| Flight Phase | descent other |
| Route In Use | enroute airway : zse |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Small Transport, Low Wing, 2 Turboprop Eng |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller non radar : 1 controller radar : 1 |
| ASRS Report | 256909 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : non radar |
| Qualification | controller : radar |
| Experience | controller radar : 20 |
| ASRS Report | 256907 |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : published procedure non adherence : required legal separation |
| Independent Detector | atc equipment other atc equipment : unspecified other controllera |
| Resolutory Action | controller : issued new clearance other |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 15000 vertical : 600 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Air carrier X en route to lws. Air carrier Y on V-253 to geg at 120. Air carrier X was issued an incorrect vector (heading 050 degrees instead of 005 degrees) for a descent. This vector took air carrier X too closely in front of air carrier Y. My attention was directed elsewhere and I did not realize it until it was too late. Supplemental information from acn 256907: the radar controller vectored an aircraft for traffic and descent. This reduced forward speed so that another aircraft overtook it. Traffic was complex with several aircraft landing at tower only airport (no radar) having to descend through overflts.
Original NASA ASRS Text
Title: CTLR GIVES WRONG HDG TO DSNDING COMMUTER ACFT RESULTING IN LTSS.
Narrative: ACR X ENRTE TO LWS. ACR Y ON V-253 TO GEG AT 120. ACR X WAS ISSUED AN INCORRECT VECTOR (HDG 050 DEGS INSTEAD OF 005 DEGS) FOR A DSCNT. THIS VECTOR TOOK ACR X TOO CLOSELY IN FRONT OF ACR Y. MY ATTN WAS DIRECTED ELSEWHERE AND I DID NOT REALIZE IT UNTIL IT WAS TOO LATE. SUPPLEMENTAL INFO FROM ACN 256907: THE RADAR CTLR VECTORED AN ACFT FOR TFC AND DSCNT. THIS REDUCED FORWARD SPD SO THAT ANOTHER ACFT OVERTOOK IT. TFC WAS COMPLEX WITH SEVERAL ACFT LNDG AT TWR ONLY ARPT (NO RADAR) HAVING TO DSND THROUGH OVERFLTS.
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.