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ZID ARTCC controller apparently was not briefed properly and did not know an air carrier was given a clearance to deviate at pilot's discretion resulting in a loss of separation.
| Attributes | |
| ACN | 485616 |
| Time | |
| Date | 200009 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : day.airport |
| State Reference | OH |
| Altitude | msl single value : 25000 |
| Environment | |
| Flight Conditions | Marginal |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zid.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | descent : vacating altitude |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zid.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B737-400 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : handoff position |
| Qualification | controller : radar |
| Experience | controller radar : 11 controller time certified in position1 : 11 |
| ASRS Report | 485616 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Events | |
| Anomaly | conflict : airborne critical non adherence : published procedure non adherence : required legal separation |
| Independent Detector | atc equipment : conflict alert other controllera other controllerb other other : 3 |
| Resolutory Action | none taken : insufficient time |
| Miss Distance | horizontal : 27000 vertical : 200 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
I was working the radar associate position for 2 mins when the radar position began a briefing to be relieved for a break. During the briefing air carrier X was issued a clearance to deviate at his discretion. The new radar controller accepted the position. During the briefing some information was given erroneously and also left out. This caused the sector team to become distracted with duties it should not have been left to do. Aircraft X then deviated into the flight path of aircraft Y. Aircraft Y was level at FL250 waiting for higher. If we had not been bogged down with the extra duties from the poor briefing, we could have climbed aircraft Y to his requested altitude and possibly not have become involved in the error.
Original NASA ASRS Text
Title: ZID ARTCC CTLR APPARENTLY WAS NOT BRIEFED PROPERLY AND DID NOT KNOW AN ACR WAS GIVEN A CLRNC TO DEVIATE AT PLT'S DISCRETION RESULTING IN A LOSS OF SEPARATION.
Narrative: I WAS WORKING THE RADAR ASSOCIATE POS FOR 2 MINS WHEN THE RADAR POS BEGAN A BRIEFING TO BE RELIEVED FOR A BREAK. DURING THE BRIEFING ACR X WAS ISSUED A CLRNC TO DEVIATE AT HIS DISCRETION. THE NEW RADAR CTLR ACCEPTED THE POS. DURING THE BRIEFING SOME INFO WAS GIVEN ERRONEOUSLY AND ALSO LEFT OUT. THIS CAUSED THE SECTOR TEAM TO BECOME DISTRACTED WITH DUTIES IT SHOULD NOT HAVE BEEN LEFT TO DO. ACFT X THEN DEVIATED INTO THE FLT PATH OF ACFT Y. ACFT Y WAS LEVEL AT FL250 WAITING FOR HIGHER. IF WE HAD NOT BEEN BOGGED DOWN WITH THE EXTRA DUTIES FROM THE POOR BRIEFING, WE COULD HAVE CLBED ACFT Y TO HIS REQUESTED ALT AND POSSIBLY NOT HAVE BECOME INVOLVED IN THE ERROR.
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.