 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
TCASII resolution advisory causes air carrier flight crew to create an altitude deviation altitude excursion.
| Attributes | |
| ACN | 176883 |
| Time | |
| Date | 199104 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : aex |
| State Reference | LA |
| Altitude | msl bound lower : 31000 msl bound upper : 31600 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zhu artcc : zfw |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other Other |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | other |
| Make Model Name | Fighter |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : instrument pilot : flight engineer pilot : commercial pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 10000 flight time type : 350 |
| ASRS Report | 176883 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 5000 flight time type : 600 |
| ASRS Report | 177104 |
| Events | |
| Anomaly | aircraft equipment problem : less severe altitude deviation : excursion from assigned altitude conflict : airborne less severe non adherence : clearance other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified |
| Resolutory Action | flight crew : took evasive action flight crew : exited adverse environment |
| Consequence | faa : reviewed incident with flight crew |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | Pilot Deviation other |
Narrative:
TCAS RA occurred in cruise at FL310. We complied with the advisory, which called for a climb of 2000 FPM. Total deviation was 600'. We advised ATC as we were complying with the RA. The controller was upset (initially) and told us to return to FL310 as soon as possible. When we informed him of our obligation to follow TCAS RA, he stated he understood. He also stated that there had been a flight of fgt aircraft below us. I suspect that their flight vector must have been at least momentarily in conflict with ours. I believe this is a serious problem with the TCAS system and further investigation of events such as this as definitely necessary.
Original NASA ASRS Text
Title: TCASII RESOLUTION ADVISORY CAUSES ACR FLT CREW TO CREATE AN ALT DEVIATION ALT EXCURSION.
Narrative: TCAS RA OCCURRED IN CRUISE AT FL310. WE COMPLIED WITH THE ADVISORY, WHICH CALLED FOR A CLB OF 2000 FPM. TOTAL DEVIATION WAS 600'. WE ADVISED ATC AS WE WERE COMPLYING WITH THE RA. THE CTLR WAS UPSET (INITIALLY) AND TOLD US TO RETURN TO FL310 ASAP. WHEN WE INFORMED HIM OF OUR OBLIGATION TO FOLLOW TCAS RA, HE STATED HE UNDERSTOOD. HE ALSO STATED THAT THERE HAD BEEN A FLT OF FGT ACFT BELOW US. I SUSPECT THAT THEIR FLT VECTOR MUST HAVE BEEN AT LEAST MOMENTARILY IN CONFLICT WITH OURS. I BELIEVE THIS IS A SERIOUS PROB WITH THE TCAS SYS AND FURTHER INVESTIGATION OF EVENTS SUCH AS THIS AS DEFINITELY NECESSARY.
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.