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A wbound A320 advised ARTCC controller that he was responding to a TCASII RA and descending 300 ft. ARTCC controller didn't have any traffic other than a B767 at FL370, 5 mi to the left and 2000 ft higher. No altitude change in either aircraft's data block noted.
| Attributes | |
| ACN | 344340 |
| Time | |
| Date | 199608 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : dsm |
| State Reference | IA |
| Altitude | msl bound lower : 34700 msl bound upper : 35000 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zmp |
| Operator | common carrier : air carrier |
| Make Model Name | A320 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | B767 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller radar : 5 |
| ASRS Report | 344340 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified |
| Resolutory Action | none taken : anomaly accepted |
| Consequence | Other |
| Miss Distance | horizontal : 30000 vertical : 2300 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | other |
Narrative:
An air carrier A320 was wbound level at FL350. He advised me he had a TCASII RA that told him to descend 300 ft. The closest aircraft was an air carrier B767 eastbound at FL370. I saw B767 pass 5 mi off the right side of A320. I did not observe any altitude change by the A320.
Original NASA ASRS Text
Title: A WBOUND A320 ADVISED ARTCC CTLR THAT HE WAS RESPONDING TO A TCASII RA AND DSNDING 300 FT. ARTCC CTLR DIDN'T HAVE ANY TFC OTHER THAN A B767 AT FL370, 5 MI TO THE L AND 2000 FT HIGHER. NO ALT CHANGE IN EITHER ACFT'S DATA BLOCK NOTED.
Narrative: AN ACR A320 WAS WBOUND LEVEL AT FL350. HE ADVISED ME HE HAD A TCASII RA THAT TOLD HIM TO DSND 300 FT. THE CLOSEST ACFT WAS AN ACR B767 EBOUND AT FL370. I SAW B767 PASS 5 MI OFF THE R SIDE OF A320. I DID NOT OBSERVE ANY ALT CHANGE BY THE A320.
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.