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While descending to avoid an intruder aircraft, intruder aircraft descended also causing a TCASII RA which called for a climb.
| Attributes | |
| ACN | 232926 |
| Time | |
| Date | 199302 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : sli |
| State Reference | CA |
| Altitude | msl bound lower : 5000 msl bound upper : 6000 |
| Aircraft 1 | |
| Controlling Facilities | tracon : sna |
| Operator | common carrier : air carrier |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Flight Phase | climbout : intermediate altitude cruise other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Flight Phase | descent other |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : radar |
| Experience | controller military : 6 controller radar : 12 |
| ASRS Report | 232926 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : ground less severe non adherence : required legal separation |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other controllera |
| Resolutory Action | flight crew : took evasive action |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Unknown traffic maneuvering at 5000 vicinity albas intersection. I advised air carrier X to descend for traffic, then unknown traffic descended so I turned air carrier X, at which time air carrier X advised of an RA and climbed to 6000. TCASII is a constant distraction at nzj (coast TRACON). In many cases it is more than a distraction, a very serious safety issue. RA's are very difficult to anticipate. Turn off the RA portion in this type of terminal environment.
Original NASA ASRS Text
Title: WHILE DSNDING TO AVOID AN INTRUDER ACFT, INTRUDER ACFT DSNDED ALSO CAUSING A TCASII RA WHICH CALLED FOR A CLB.
Narrative: UNKNOWN TFC MANEUVERING AT 5000 VICINITY ALBAS INTXN. I ADVISED ACR X TO DSND FOR TFC, THEN UNKNOWN TFC DSNDED SO I TURNED ACR X, AT WHICH TIME ACR X ADVISED OF AN RA AND CLBED TO 6000. TCASII IS A CONSTANT DISTR AT NZJ (COAST TRACON). IN MANY CASES IT IS MORE THAN A DISTR, A VERY SERIOUS SAFETY ISSUE. RA'S ARE VERY DIFFICULT TO ANTICIPATE. TURN OFF THE RA PORTION IN THIS TYPE OF TERMINAL ENVIRONMENT.
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.