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Potential conflict sensed by TCASII RA and air carrier medium large transport performs evasive action climb in accord with airline management policy operational procedure. Altitude deviation altitude excursion.
| Attributes | |
| ACN | 222789 |
| Time | |
| Date | 199210 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : sav |
| State Reference | GA |
| Altitude | msl bound lower : 24000 msl bound upper : 25000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zjx tower : iah |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | other |
| Make Model Name | Fighter |
| 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 : flight engineer pilot : atp |
| Experience | flight time last 90 days : 60 flight time total : 13000 flight time type : 5000 |
| ASRS Report | 222789 |
| 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 non adherence : published procedure non adherence : required legal separation other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified |
| Resolutory Action | flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | horizontal : 6000 vertical : 700 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
The aircraft was on autoplt, level at FL240 and I was at the controls. We got a TA warning on our TCASII. The conflict aircraft was at 1 O'clock, 6 mi, 900 ft below us, and in level flight. About 10 seconds later we got an RA warning. The TCASII commanded a 2000 FPM or better climb. I disengaged the autoplt, started the climb, and asked the first officer to advise ATC. ATC seemed unconcerned. Climbing through FL245 the TCASII warning changed back to a TA. When we leveled at FL250 the TCASII indicated that the conflict aircraft was clear behind us and 1500 ft below us. The first officer then told ATC that we were level at FL250 and starting our descent back to FL240. The ATC controller said 'roger,' then stated that the conflict aircraft was a pair of fgts at FL230 and clear behind us. We continued on our flight to dab.
Original NASA ASRS Text
Title: POTENTIAL CONFLICT SENSED BY TCASII RA AND ACR MLG PERFORMS EVASIVE ACTION CLB IN ACCORD WITH AIRLINE MGMNT POLICY OPERATIONAL PROC. ALTDEV ALT EXCURSION.
Narrative: THE ACFT WAS ON AUTOPLT, LEVEL AT FL240 AND I WAS AT THE CTLS. WE GOT A TA WARNING ON OUR TCASII. THE CONFLICT ACFT WAS AT 1 O'CLOCK, 6 MI, 900 FT BELOW US, AND IN LEVEL FLT. ABOUT 10 SECONDS LATER WE GOT AN RA WARNING. THE TCASII COMMANDED A 2000 FPM OR BETTER CLB. I DISENGAGED THE AUTOPLT, STARTED THE CLB, AND ASKED THE FO TO ADVISE ATC. ATC SEEMED UNCONCERNED. CLBING THROUGH FL245 THE TCASII WARNING CHANGED BACK TO A TA. WHEN WE LEVELED AT FL250 THE TCASII INDICATED THAT THE CONFLICT ACFT WAS CLR BEHIND US AND 1500 FT BELOW US. THE FO THEN TOLD ATC THAT WE WERE LEVEL AT FL250 AND STARTING OUR DSCNT BACK TO FL240. THE ATC CTLR SAID 'ROGER,' THEN STATED THAT THE CONFLICT ACFT WAS A PAIR OF FGTS AT FL230 AND CLR BEHIND US. WE CONTINUED ON OUR FLT TO DAB.
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.