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Air carrier X TCASII RA from air carrier Y non adherence to ATC clearance descended back through occupied altitude. Evasive action taken. Pilot deviation. TCASII logic.
| Attributes | |
| ACN | 250850 |
| Time | |
| Date | 199309 |
| Day | Thu |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : mou |
| State Reference | FO |
| Altitude | msl bound lower : 34500 msl bound upper : 36500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : lfff |
| Operator | common carrier : air carrier |
| Make Model Name | Widebody, Low Wing, 3 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | climbout : intermediate altitude descent other |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Widebody, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other Other |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 210 flight time total : 17800 flight time type : 700 |
| ASRS Report | 250850 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Events | |
| Anomaly | altitude deviation : undershoot conflict : airborne less severe non adherence : clearance non adherence : published procedure non adherence : required legal separation |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified |
| Resolutory Action | flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | horizontal : 3000 vertical : 800 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Air carrier X on climb to FL370 and radar vector, we got an TCASII RA at 36500 ft. We descended to 34000 ft as other widebody transport passed overhead. We told paris control and they had no idea that an aircraft was that close to us.
Original NASA ASRS Text
Title: ACR X TCASII RA FROM ACR Y NON ADHERENCE TO ATC CLRNC DSNDED BACK THROUGH OCCUPIED ALT. EVASIVE ACTION TAKEN. PLTDEV. TCASII LOGIC.
Narrative: ACR X ON CLB TO FL370 AND RADAR VECTOR, WE GOT AN TCASII RA AT 36500 FT. WE DSNDED TO 34000 FT AS OTHER WDB PASSED OVERHEAD. WE TOLD PARIS CTL AND THEY HAD NO IDEA THAT AN ACFT WAS THAT CLOSE TO US.
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.