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TCASII alerts A320 flight crew to an impending potential conflict with descending opposite-direction traffic. Traffic was about to perform descent through occupied altitude. Evasive action turn level off.
| Attributes | |
| ACN | 341653 |
| Time | |
| Date | 199607 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : pdx |
| State Reference | OR |
| Altitude | msl bound lower : 6300 msl bound upper : 6300 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | A320 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | enroute airway : pdx |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 15000 flight time type : 400 |
| ASRS Report | 341653 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation non adherence : clearance other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified |
| Resolutory Action | flight crew : took evasive action flight crew : exited adverse environment |
| Consequence | Other |
| Miss Distance | horizontal : 3000 vertical : 1200 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation Operational Deviation other |
Narrative:
At 6300 ft on climb TCASII showed intruder at 12:30-1 O'clock, 2700 ft above and descending (we were cleared to 9000 ft). Questioned continued climb. TCASII RA 'monitor vertical speed' stopped climb and hard left turn. Other aircraft passed overhead. Other aircraft had clearance to descend to 5000 ft but departure said stop descent. Spoke with approach controller at pdx who confirmed apparent mis-readback on descent clearance from other aircraft.
Original NASA ASRS Text
Title: TCASII ALERTS A320 FLC TO AN IMPENDING POTENTIAL CONFLICT WITH DSNDING OPPOSITE-DIRECTION TFC. TFC WAS ABOUT TO PERFORM DSCNT THROUGH OCCUPIED ALT. EVASIVE ACTION TURN LEVEL OFF.
Narrative: AT 6300 FT ON CLB TCASII SHOWED INTRUDER AT 12:30-1 O'CLOCK, 2700 FT ABOVE AND DSNDING (WE WERE CLRED TO 9000 FT). QUESTIONED CONTINUED CLB. TCASII RA 'MONITOR VERT SPD' STOPPED CLB AND HARD L TURN. OTHER ACFT PASSED OVERHEAD. OTHER ACFT HAD CLRNC TO DSND TO 5000 FT BUT DEP SAID STOP DSCNT. SPOKE WITH APCH CTLR AT PDX WHO CONFIRMED APPARENT MIS-READBACK ON DSCNT CLRNC FROM OTHER ACFT.
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.