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ZDC radar associate described operational error at FL370 when radar controller failed to recognize developing loss of separation and issued turns as aircraft reacted to TCASII RA.
| Attributes | |
| ACN | 670487 |
| Time | |
| Date | 200508 |
| Place | |
| Locale Reference | navaid : orf.vortac |
| State Reference | VA |
| Altitude | msl single value : 37000 |
| Environment | |
| Weather Elements | Thunderstorm |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdc.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level descent : holding |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zdc.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : non radar controller : radar |
| Experience | controller non radar : 11 controller radar : 10 controller time certified in position1 : 5 |
| ASRS Report | 670487 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation |
| Independent Detector | atc equipment : conflict alert aircraft equipment : tcas other controllera |
| Resolutory Action | controller : issued alert controller : issued new clearance flight crew : took evasive action |
| Consequence | faa : investigated |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Air carrier X was in hold at FL370 over orf VORTAC. Air carrier Y was northbound at FL370. There was holding for jfk and lga at the time. Sector 59 called to tell us to spin an aircraft. Shortly after; conflict alert activated between air carrier X and air carrier Y. The r-side instructed both aircraft to turn. Both responded. They were reacting to RA's.
Original NASA ASRS Text
Title: ZDC RADAR ASSOCIATE DESCRIBED OPERROR AT FL370 WHEN RADAR CTLR FAILED TO RECOGNIZE DEVELOPING LOSS OF SEPARATION AND ISSUED TURNS AS ACFT REACTED TO TCASII RA.
Narrative: ACR X WAS IN HOLD AT FL370 OVER ORF VORTAC. ACR Y WAS NBOUND AT FL370. THERE WAS HOLDING FOR JFK AND LGA AT THE TIME. SECTOR 59 CALLED TO TELL US TO SPIN AN ACFT. SHORTLY AFTER; CONFLICT ALERT ACTIVATED BTWN ACR X AND ACR Y. THE R-SIDE INSTRUCTED BOTH ACFT TO TURN. BOTH RESPONDED. THEY WERE REACTING TO RA'S.
Data retrieved from NASA's ASRS site as of January 2009 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.