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ZLA controller advised by B735 flight crew of TCASII maneuver caused by traffic shown 400 ft above. ZLA advised no aircraft above B735, but 2000 ft below.
| Attributes | |
| ACN | 503850 |
| Time | |
| Date | 200103 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | navaid : blh.vortac |
| State Reference | CA |
| Altitude | msl bound lower : 30500 msl bound upper : 31000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zla.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B737-500 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | cruise : level |
| Route In Use | enroute other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zla.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | MD-80 Series (DC-9-80) Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Route In Use | enroute other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | pilot : instrument |
| Experience | flight time total : 300 |
| ASRS Report | 503850 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude other anomaly other |
| Independent Detector | aircraft equipment : tcas other controllera other flight crewa |
| Resolutory Action | controller : issued advisory flight crew : returned to assigned altitude |
| Consequence | faa : reviewed incident with flight crew |
| Supplementary | |
| Problem Areas | Aircraft |
| Primary Problem | Aircraft |
Narrative:
Air carrier X advised he was responding to an RA and descending. I advised air carrier X that there was not any traffic in his vicinity, except for an MD80 7 mi south of his position at FL290. Air carrier X said he had traffic 400 ft above him. There were no primary returns in the vicinity of air carrier X nor any other traffic. I advised air carrier X of this again and the pilot stated he was returning to FL310.
Original NASA ASRS Text
Title: ZLA CTLR ADVISED BY B735 FLC OF TCASII MANEUVER CAUSED BY TFC SHOWN 400 FT ABOVE. ZLA ADVISED NO ACFT ABOVE B735, BUT 2000 FT BELOW.
Narrative: ACR X ADVISED HE WAS RESPONDING TO AN RA AND DSNDING. I ADVISED ACR X THAT THERE WAS NOT ANY TFC IN HIS VICINITY, EXCEPT FOR AN MD80 7 MI S OF HIS POS AT FL290. ACR X SAID HE HAD TFC 400 FT ABOVE HIM. THERE WERE NO PRIMARY RETURNS IN THE VICINITY OF ACR X NOR ANY OTHER TFC. I ADVISED ACR X OF THIS AGAIN AND THE PLT STATED HE WAS RETURNING TO FL310.
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.