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Flight crew of an medium large transport air carrier aircraft deviated from assigned altitude in response to a TCASII RA.
| Attributes | |
| ACN | 248281 |
| Time | |
| Date | 199308 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : fst |
| State Reference | TX |
| Altitude | msl bound lower : 34500 msl bound upper : 35000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zhu |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other Other |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : commercial pilot : flight engineer pilot : instrument pilot : atp pilot : cfi |
| Experience | flight time last 90 days : 200 flight time total : 16000 flight time type : 8000 |
| ASRS Report | 248281 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | controller : issued new clearance flight crew : took evasive action |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | Pilot Deviation |
Narrative:
We were in cruise flight at FL350 and received a TCASII TA followed immediately by an RA alert giving us approximately a 2000 FPM descent rate which we immediately followed. We advised ATC and they cleared us to FL310. ATC advised there was no observed traffic within 12 mi of our location, but understood our need to follow the RA and that there was no conflict observed. We never saw any traffic which showed to be at our altitude at 6 O'clock, almost right at us.
Original NASA ASRS Text
Title: FLC OF AN MLG ACR ACFT DEVIATED FROM ASSIGNED ALT IN RESPONSE TO A TCASII RA.
Narrative: WE WERE IN CRUISE FLT AT FL350 AND RECEIVED A TCASII TA FOLLOWED IMMEDIATELY BY AN RA ALERT GIVING US APPROX A 2000 FPM DSCNT RATE WHICH WE IMMEDIATELY FOLLOWED. WE ADVISED ATC AND THEY CLRED US TO FL310. ATC ADVISED THERE WAS NO OBSERVED TFC WITHIN 12 MI OF OUR LOCATION, BUT UNDERSTOOD OUR NEED TO FOLLOW THE RA AND THAT THERE WAS NO CONFLICT OBSERVED. WE NEVER SAW ANY TFC WHICH SHOWED TO BE AT OUR ALT AT 6 O'CLOCK, ALMOST RIGHT AT US.
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.