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Air carrier vicinity of bna at FL220 receives TCASII RA to descend approximately 500 ft and spotted an aircraft pass overhead.
| Attributes | |
| ACN | 407367 |
| Time | |
| Date | 199807 |
| Day | Fri |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : bna |
| State Reference | TN |
| Altitude | msl bound lower : 21600 msl bound upper : 22000 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zid |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Operating Under FAR Part | other : unknown |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : cfi pilot : instrument pilot : flight engineer pilot : atp |
| Experience | flight time total : 8000 |
| ASRS Report | 407367 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | conflict : nmac non adherence : required legal separation other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : took evasive action none taken : unable |
| Consequence | Other |
| Miss Distance | horizontal : 500 vertical : 500 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
Narrative:
At cruise altitude FL220 while deviating around WX with ATC clearance we received a TCASII TA. We saw on TCASII an aircraft climbing toward us from ahead to the northwest. I was hand flying due to an inoperative autoplt and began looking outside for the traffic. We then received an RA alert commanding a 2500-3000 FPM descent. I immediately began a descent. Passing approximately FL216 the RA stopped, the first officer said he saw the other aircraft above us, and the TCASII indicated traffic clear. I leveled at FL215 and climbed back to FL220. When we initiated the descent we notified ZID. We then called them upon climbing back to FL220. They apologized and we continued to msp.
Original NASA ASRS Text
Title: ACR VICINITY OF BNA AT FL220 RECEIVES TCASII RA TO DSND APPROX 500 FT AND SPOTTED AN ACFT PASS OVERHEAD.
Narrative: AT CRUISE ALT FL220 WHILE DEVIATING AROUND WX WITH ATC CLRNC WE RECEIVED A TCASII TA. WE SAW ON TCASII AN ACFT CLBING TOWARD US FROM AHEAD TO THE NW. I WAS HAND FLYING DUE TO AN INOP AUTOPLT AND BEGAN LOOKING OUTSIDE FOR THE TFC. WE THEN RECEIVED AN RA ALERT COMMANDING A 2500-3000 FPM DSCNT. I IMMEDIATELY BEGAN A DSCNT. PASSING APPROX FL216 THE RA STOPPED, THE FO SAID HE SAW THE OTHER ACFT ABOVE US, AND THE TCASII INDICATED TFC CLR. I LEVELED AT FL215 AND CLBED BACK TO FL220. WHEN WE INITIATED THE DSCNT WE NOTIFIED ZID. WE THEN CALLED THEM UPON CLBING BACK TO FL220. THEY APOLOGIZED AND WE CONTINUED TO MSP.
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.