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|
Attributes | |
ACN | 243947 |
Time | |
Date | 199306 |
Day | Thu |
Local Time Of Day | 0601 To 1200 |
Place | |
Locale Reference | atc facility : olm |
State Reference | WA |
Altitude | msl bound lower : 10000 msl bound upper : 10000 |
Environment | |
Flight Conditions | VMC |
Light | Daylight |
Aircraft 1 | |
Controlling Facilities | artcc : zse tower : sea |
Operator | common carrier : air carrier |
Make Model Name | Light Transport, Low Wing, 2 Turboprop Eng |
Flight Phase | other |
Flight Plan | IFR |
Aircraft 2 | |
Operator | common carrier : air carrier |
Make Model Name | Light Transport, Low Wing, 2 Turboprop Eng |
Flight Phase | other |
Flight Plan | IFR |
Person 1 | |
Affiliation | government : faa |
Function | controller : radar |
Qualification | controller : radar |
Experience | controller radar : 1 |
ASRS Report | 243947 |
Person 2 | |
Affiliation | government : faa |
Function | controller : approach |
Qualification | controller : radar |
Events | |
Anomaly | conflict : airborne less severe non adherence : published procedure non adherence : required legal separation |
Independent Detector | other controllera |
Resolutory Action | controller : issued new clearance other |
Consequence | faa : investigated |
Miss Distance | horizontal : 27600 vertical : 300 |
Supplementary | |
Primary Problem | ATC Human Performance |
Air Traffic Incident | Operational Error |
Narrative:
I cleared an air carrier X into holding for metering and then asked him to meet a metering time inbound over the fix he was holding at but did not actually clear the aircraft inbound on the arrival. After transferring communications with air carrier X to seattle approach, the aircraft turned around (in holding) head-on with another air carrier Y at the same altitude. I turned air carrier Y (I was still talking to) immediately away and climbed him, however, separation was lost at 4.6 mi. The aircraft I was in communications with had the first aircraft in sight.
Original NASA ASRS Text
Title: ACR X HOLDING AT SAME ALT HAD LTSS FROM ACR Y. SYS ERROR.
Narrative: I CLRED AN ACR X INTO HOLDING FOR METERING AND THEN ASKED HIM TO MEET A METERING TIME INBOUND OVER THE FIX HE WAS HOLDING AT BUT DID NOT ACTUALLY CLR THE ACFT INBOUND ON THE ARR. AFTER TRANSFERRING COMS WITH ACR X TO SEATTLE APCH, THE ACFT TURNED AROUND (IN HOLDING) HEAD-ON WITH ANOTHER ACR Y AT THE SAME ALT. I TURNED ACR Y (I WAS STILL TALKING TO) IMMEDIATELY AWAY AND CLBED HIM, HOWEVER, SEPARATION WAS LOST AT 4.6 MI. THE ACFT I WAS IN COMS WITH HAD THE FIRST ACFT IN SIGHT.
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.