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Air carrier X TCASII TA RA descend had near midair collision less than standard separation from military fgt. Evasive action taken.
| Attributes | |
| ACN | 236170 |
| Time | |
| Date | 199303 |
| Day | Tue |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : irk |
| State Reference | MO |
| Altitude | msl bound lower : 23000 msl bound upper : 24000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zkc |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | cruise other |
| Route In Use | arrival star : star |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | other |
| Make Model Name | Fighter |
| Flight Phase | cruise other |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | observation : company check pilot |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 13500 flight time type : 1200 |
| ASRS Report | 236170 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | instruction : trainee |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude conflict : nmac non adherence : required legal separation non adherence : published procedure |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified |
| Resolutory Action | flight crew : took evasive action |
| Consequence | faa : reviewed incident with flight crew |
| Miss Distance | horizontal : 300 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Student pilot flying. Air carrier X level FL240 between irk and uin on rivers 1 STAR to stl. High haze layer. TCASII alert 'traffic, traffic' with amber hollow diamond. Observed 2 small targets passing from left to right. One at 12 O'clock and one at 2 O'clock. Then immediately, 'descend, descend' from TCASII. Red arc to 2000 ft down. PF disconnected autoplt and descended to approximately 23000. Passing through 23700, another target was observed through the captain's windshield coming directly at us. No relative motion. It then made a 70 degree to 90 degree banking left turn and climbed over our flight path and joined the other 2 targets. ATC was advised of the altitude deviation. ATC advised that the target was level at 25000. I told them about the closeness, approximately 300 to 500 ft and they gave me a phone number to talk to ATC. Supplemental information from acn 236282: air carrier X (FL240) vertically separated from military fgt's at FL250 deviated 300 ft from ATC clearance and questioned controller handling of vertical separation.
Original NASA ASRS Text
Title: ACR X TCASII TA RA DSND HAD NMAC LTSS FROM MIL FGT. EVASIVE ACTION TAKEN.
Narrative: STUDENT PLT FLYING. ACR X LEVEL FL240 BTWN IRK AND UIN ON RIVERS 1 STAR TO STL. HIGH HAZE LAYER. TCASII ALERT 'TFC, TFC' WITH AMBER HOLLOW DIAMOND. OBSERVED 2 SMALL TARGETS PASSING FROM L TO R. ONE AT 12 O'CLOCK AND ONE AT 2 O'CLOCK. THEN IMMEDIATELY, 'DSND, DSND' FROM TCASII. RED ARC TO 2000 FT DOWN. PF DISCONNECTED AUTOPLT AND DSNDED TO APPROX 23000. PASSING THROUGH 23700, ANOTHER TARGET WAS OBSERVED THROUGH THE CAPT'S WINDSHIELD COMING DIRECTLY AT US. NO RELATIVE MOTION. IT THEN MADE A 70 DEG TO 90 DEG BANKING L TURN AND CLBED OVER OUR FLT PATH AND JOINED THE OTHER 2 TARGETS. ATC WAS ADVISED OF THE ALTDEV. ATC ADVISED THAT THE TARGET WAS LEVEL AT 25000. I TOLD THEM ABOUT THE CLOSENESS, APPROX 300 TO 500 FT AND THEY GAVE ME A PHONE NUMBER TO TALK TO ATC. SUPPLEMENTAL INFO FROM ACN 236282: ACR X (FL240) VERTICALLY SEPARATED FROM MIL FGT'S AT FL250 DEVIATED 300 FT FROM ATC CLRNC AND QUESTIONED CTLR HANDLING OF VERT SEPARATION.
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.