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MD80 flight crew at FL310 with ZBW experienced TCASII RA after controller advised reporter that a TCASII event might occur.
| Attributes | |
| ACN | 663719 |
| Time | |
| Date | 200507 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | navaid : alb.vortac |
| State Reference | NY |
| Altitude | msl single value : 31000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zbw.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | MD-83 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other vortac |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zbw.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | A340 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| ASRS Report | 663719 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Events | |
| Anomaly | conflict : airborne critical |
| Independent Detector | aircraft equipment : tcas other flight crewa |
| Resolutory Action | controller : issued advisory flight crew : took evasive action |
| Miss Distance | vertical : 400 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
Narrative:
During cruise level; we were notified by center that an airbus was descending into our altitude and we might get a TCASII alert. We did receive an RA and the airbus 340 passed 400 ft below us as he was descending. Not sure exactly what our cruise altitude was at the time; but the A340 should not have been told to continue his descent into our flight path. This mistake was exacerbated by ZBW telling him to continue to descend and then telling us that he may hit us!
Original NASA ASRS Text
Title: MD80 FLT CREW AT FL310 WITH ZBW EXPERIENCED TCASII RA AFTER CTLR ADVISED RPTR THAT A TCASII EVENT MIGHT OCCUR.
Narrative: DURING CRUISE LEVEL; WE WERE NOTIFIED BY CTR THAT AN AIRBUS WAS DSNDING INTO OUR ALT AND WE MIGHT GET A TCASII ALERT. WE DID RECEIVE AN RA AND THE AIRBUS 340 PASSED 400 FT BELOW US AS HE WAS DSNDING. NOT SURE EXACTLY WHAT OUR CRUISE ALT WAS AT THE TIME; BUT THE A340 SHOULD NOT HAVE BEEN TOLD TO CONTINUE HIS DSCNT INTO OUR FLT PATH. THIS MISTAKE WAS EXACERBATED BY ZBW TELLING HIM TO CONTINUE TO DSND AND THEN TELLING US THAT HE MAY HIT US!
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.