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Air carrier medium large transport altitude deviation excursion from clearance altitude in response to TCASII RA.
| Attributes | |
| ACN | 198785 |
| Time | |
| Date | 199112 |
| Day | Mon |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : ccc |
| State Reference | NY |
| Altitude | msl bound lower : 9500 msl bound upper : 10000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Dusk |
| Aircraft 1 | |
| Controlling Facilities | artcc : zny |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 210 flight time total : 14000 flight time type : 1414 |
| ASRS Report | 198785 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude conflict : airborne less severe |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified |
| Resolutory Action | flight crew : returned to intended course or assigned course |
| Consequence | Other |
| Miss Distance | horizontal : 3000 vertical : 1500 |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | Pilot Deviation |
Narrative:
The TCASII has no way of knowing the traffic it is warning about will stop its descent. The conflict was due to an ATC controled aircraft descending to 11000 ft at our 1 O'clock position. Although we had aircraft in sight we were not sure that traffic was the aircraft giving us the RA and therefore followed its direction.
Original NASA ASRS Text
Title: ACR MLG ALTDEV EXCURSION FROM CLRNC ALT IN RESPONSE TO TCASII RA.
Narrative: THE TCASII HAS NO WAY OF KNOWING THE TFC IT IS WARNING ABOUT WILL STOP ITS DSCNT. THE CONFLICT WAS DUE TO AN ATC CTLED ACFT DSNDING TO 11000 FT AT OUR 1 O'CLOCK POS. ALTHOUGH WE HAD ACFT IN SIGHT WE WERE NOT SURE THAT TFC WAS THE ACFT GIVING US THE RA AND THEREFORE FOLLOWED ITS DIRECTION.
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.