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Air carrier medium large transport altitude deviation from cruise altitude of FL270 in response to TCASII RA after traffic had been sighted.
| Attributes | |
| ACN | 191871 |
| Time | |
| Date | 199110 |
| Day | Sat |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : cae |
| State Reference | SC |
| Altitude | msl bound lower : 26500 msl bound upper : 27000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zjx |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : flight engineer |
| Experience | flight time last 90 days : 120 flight time total : 7500 |
| ASRS Report | 191871 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : flight engineer pilot : commercial pilot : cfi pilot : atp |
| Experience | flight time last 90 days : 210 flight time total : 7500 flight time type : 350 |
| ASRS Report | 191875 |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude non adherence : clearance |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other controllera |
| Resolutory Action | flight crew : returned to intended course or assigned course |
| Consequence | Other |
| Miss Distance | horizontal : 12000 vertical : 1400 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | other |
Narrative:
During level flight at FL270, ATC pointed out military traffic at our 10 O'clock position. The traffic was momentarily sighted and tracked on TCASII. TCASII sounded an advisory and followed with a resolution. (Traffic was shown descending to within 1400 ft). I complied with the resolution, which was a 2500 FPM descent, and advised ATC of deviation. The controller responded that the traffic was in level flight, although TCASII showed traffic in a momentary descent. After the conflict, I returned to assigned altitude.
Original NASA ASRS Text
Title: ACR MLG ALT DEV FROM CRUISE ALT OF FL270 IN RESPONSE TO TCASII RA AFTER TFC HAD BEEN SIGHTED.
Narrative: DURING LEVEL FLT AT FL270, ATC POINTED OUT MIL TFC AT OUR 10 O'CLOCK POS. THE TFC WAS MOMENTARILY SIGHTED AND TRACKED ON TCASII. TCASII SOUNDED AN ADVISORY AND FOLLOWED WITH A RESOLUTION. (TFC WAS SHOWN DSNDING TO WITHIN 1400 FT). I COMPLIED WITH THE RESOLUTION, WHICH WAS A 2500 FPM DSCNT, AND ADVISED ATC OF DEV. THE CTLR RESPONDED THAT THE TFC WAS IN LEVEL FLT, ALTHOUGH TCASII SHOWED TFC IN A MOMENTARY DSCNT. AFTER THE CONFLICT, I RETURNED TO ASSIGNED ALT.
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.