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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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Cleared turn right. Captain of medium large transport turned left, descending, caused near midair collision. TCASII showed the traffic 400 ft below on the hose.
| Attributes | |
| ACN | 189892 |
| Time | |
| Date | 199109 |
| Day | Tue |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : ord |
| State Reference | IL |
| Altitude | msl bound lower : 6600 msl bound upper : 6600 |
| Environment | |
| Flight Conditions | IMC |
| Light | Dusk |
| Aircraft 1 | |
| Controlling Facilities | tracon : ord |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other Other |
| Flight Phase | descent : approach descent other |
| Route In Use | arrival other enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : cfi pilot : commercial pilot : flight engineer pilot : instrument |
| Experience | flight time last 90 days : 150 flight time total : 12000 flight time type : 3000 |
| ASRS Report | 189892 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : cfi pilot : commercial pilot : atp pilot : flight engineer |
| Experience | flight time last 90 days : 150 flight time total : 5000 flight time type : 625 |
| ASRS Report | 189919 |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : clearance other anomaly other other spatial deviation |
| Independent Detector | other controllera other flight crewa |
| Resolutory Action | controller : issued new clearance other |
| Consequence | Other |
| Miss Distance | vertical : 400 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
At 8000 ft on a left downwind leg, I was told to slow to 210 and expect descent shortly with a close turn to final. A second call from the approach controller warned us to prepare for a quick descent and close turn onto final. The next clearance was to descend to 4000 ft and turn right to 110 degree (present heading was 090 degree). Being 'spring loaded' to the prior warnings, I began the descent and turned to the left, thinking he'd said 010 degree. The first officer questioned my left turn about the same time ATC instructed us to make an immediate right turn to 150 degree. Our TCASII display showed an aircraft below us approximately 500 ft and slightly left of the nose as I was turning through 090 going back to the right. Although we did not get the RA, we were probably too close to the other aircraft and certainly not following the first heading clearance.
Original NASA ASRS Text
Title: CLRED TURN R. CAPT OF MLG TURNED L, DSNDING, CAUSED NMAC. TCASII SHOWED THE TFC 400 FT BELOW ON THE HOSE.
Narrative: AT 8000 FT ON A L DOWNWIND LEG, I WAS TOLD TO SLOW TO 210 AND EXPECT DSCNT SHORTLY WITH A CLOSE TURN TO FINAL. A SECOND CALL FROM THE APCH CTLR WARNED US TO PREPARE FOR A QUICK DSCNT AND CLOSE TURN ONTO FINAL. THE NEXT CLRNC WAS TO DSND TO 4000 FT AND TURN R TO 110 DEG (PRESENT HDG WAS 090 DEG). BEING 'SPRING LOADED' TO THE PRIOR WARNINGS, I BEGAN THE DSCNT AND TURNED TO THE L, THINKING HE'D SAID 010 DEG. THE FO QUESTIONED MY L TURN ABOUT THE SAME TIME ATC INSTRUCTED US TO MAKE AN IMMEDIATE R TURN TO 150 DEG. OUR TCASII DISPLAY SHOWED AN ACFT BELOW US APPROX 500 FT AND SLIGHTLY L OF THE NOSE AS I WAS TURNING THROUGH 090 GOING BACK TO THE R. ALTHOUGH WE DID NOT GET THE RA, WE WERE PROBABLY TOO CLOSE TO THE OTHER ACFT AND CERTAINLY NOT FOLLOWING THE FIRST HDG CLRNC.
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.