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Air carrier X climb through occupied altitude TCASII RA descend had less than standard separation from air carrier Y. System error.
| Attributes | |
| ACN | 238755 |
| Time | |
| Date | 199304 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : mhk |
| State Reference | KS |
| Altitude | msl bound lower : 28000 msl bound upper : 29000 |
| 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 |
| Navigation In Use | Other Other |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | cruise other |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller radar : 1 |
| ASRS Report | 238755 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 6500 flight time type : 150 |
| ASRS Report | 238368 |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : published procedure non adherence : required legal separation |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other controllera |
| Resolutory Action | controller : issued new clearance flight crew : took evasive action other |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 26400 vertical : 400 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Sbound air carrier X at FL280 stopped for traffic at FL310. Eastbound traffic at FL290. Sbound traffic passed FL310 traffic and I issued the climb to FL310. 30 seconds later I recognized conflict with FL290 eastbound air carrier Y. I descended sbound air carrier X back to FL280 and turned eastbound air carrier Y 50 degrees left. Loss of separation occurred. Supplemental information from acn 238368: air carrier X was given a climb clearance from FL280 to FL310. Through approximately FL290 our TCASII alerted us of a conflict at our 1 O'clock position, followed by an RA to descend. We made a descending left turn to approximately FL277 and was given a clear of conflict warning. The other air carrier Y was level at FL290. We came within 2 1/2 mi and approximately 800 ft of air carrier Y. The controller was pretty busy at the time.
Original NASA ASRS Text
Title: ACR X CLB THROUGH OCCUPIED ALT TCASII RA DSND HAD LTSS FROM ACR Y. SYS ERROR.
Narrative: SBOUND ACR X AT FL280 STOPPED FOR TFC AT FL310. EBOUND TFC AT FL290. SBOUND TFC PASSED FL310 TFC AND I ISSUED THE CLB TO FL310. 30 SECONDS LATER I RECOGNIZED CONFLICT WITH FL290 EBOUND ACR Y. I DSNDED SBOUND ACR X BACK TO FL280 AND TURNED EBOUND ACR Y 50 DEGS L. LOSS OF SEPARATION OCCURRED. SUPPLEMENTAL INFO FROM ACN 238368: ACR X WAS GIVEN A CLB CLRNC FROM FL280 TO FL310. THROUGH APPROX FL290 OUR TCASII ALERTED US OF A CONFLICT AT OUR 1 O'CLOCK POS, FOLLOWED BY AN RA TO DSND. WE MADE A DSNDING L TURN TO APPROX FL277 AND WAS GIVEN A CLR OF CONFLICT WARNING. THE OTHER ACR Y WAS LEVEL AT FL290. WE CAME WITHIN 2 1/2 MI AND APPROX 800 FT OF ACR Y. THE CTLR WAS PRETTY BUSY AT THE TIME.
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.