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Altitude deviation altitude excursion occurs after air carrier large transport experiences a TCASII RA for opposite direction traffic.
| Attributes | |
| ACN | 202702 |
| Time | |
| Date | 199202 |
| Day | Fri |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : stv |
| State Reference | TX |
| Altitude | msl bound lower : 37000 msl bound upper : 37800 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zhu |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | cruise other |
| Route In Use | enroute : on vectors |
| 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 |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : second officer |
| Qualification | pilot : flight engineer pilot : commercial pilot : instrument pilot : atp |
| Experience | flight time last 90 days : 50 flight time total : 3000 flight time type : 50 |
| ASRS Report | 202702 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude conflict : airborne less severe inflight encounter : weather non adherence : required legal separation non adherence : clearance |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | horizontal : 24000 vertical : 700 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Our flight was heading about 120 degrees when ATC advised us to turn left 45 degrees due to traffic. We were picking up the traffic on the TCASII at our 12 O'clock position and 7-9 mi. As we started the turn ATC advised the traffic to turn right due to traffic. The other aircraft said that they were unable to turn due to WX. At this time ATC advised us to turn further left. Also, at this time the TCASII said to 'descend' shortly followed by a command to 'climb.' we initiated a climb from FL370 to FL378. The traffic passed off our right side by 2-4 mi. We then descended back to FL370.
Original NASA ASRS Text
Title: ALTDEV ALT EXCURSION OCCURS AFTER ACR LGT EXPERIENCES A TCASII RA FOR OPPOSITE DIRECTION TFC.
Narrative: OUR FLT WAS HDG ABOUT 120 DEGS WHEN ATC ADVISED US TO TURN L 45 DEGS DUE TO TFC. WE WERE PICKING UP THE TFC ON THE TCASII AT OUR 12 O'CLOCK POS AND 7-9 MI. AS WE STARTED THE TURN ATC ADVISED THE TFC TO TURN R DUE TO TFC. THE OTHER ACFT SAID THAT THEY WERE UNABLE TO TURN DUE TO WX. AT THIS TIME ATC ADVISED US TO TURN FURTHER L. ALSO, AT THIS TIME THE TCASII SAID TO 'DSND' SHORTLY FOLLOWED BY A COMMAND TO 'CLB.' WE INITIATED A CLB FROM FL370 TO FL378. THE TFC PASSED OFF OUR R SIDE BY 2-4 MI. WE THEN DSNDED BACK TO FL370.
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.