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Reporter's TCASII does not display reported traffic for one incident during the flight. Other aircraft and ARTCC reported a mode C readout on the reported traffic.
| Attributes | |
| ACN | 483290 |
| Time | |
| Date | 200008 |
| Day | Wed |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : sjc.airport |
| State Reference | CA |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : o90.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | MD-80 Super 80 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach |
| Route In Use | arrival star : el nido |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tracon : o90.tracon |
| Operator | general aviation : personal |
| Make Model Name | Baron 55/Cochise |
| Operating Under FAR Part | Part 91 |
| Flight Phase | cruise : level |
| Flight Plan | VFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 483290 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : multi engine pilot : instrument pilot : commercial |
| Events | |
| Anomaly | aircraft equipment problem : less severe other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : anomaly accepted |
| Consequence | other other |
| Supplementary | |
| Problem Areas | Aircraft |
| Primary Problem | Aircraft |
Narrative:
We were descending into sjc on the el nido 4 arrival and were told to maintain our altitude and that there was an opposite direction baron 1000 ft below us. I asked the controller if the baron had mode C. He said that yes he had a mode C readout on the baron. Our TCASII never picked up the baron at any setting at any range. I don't know how close we got to him because I never got a visual on him. Behind us on the el nido 4 arrival was air carrier Z. He said that he picked up the baron at 4 mi on his TCASII. The TCASII had pointed out all other traffic that day.
Original NASA ASRS Text
Title: RPTR'S TCASII DOES NOT DISPLAY RPTED TFC FOR ONE INCIDENT DURING THE FLT. OTHER ACFT AND ARTCC RPTED A MODE C READOUT ON THE RPTED TFC.
Narrative: WE WERE DSNDING INTO SJC ON THE EL NIDO 4 ARR AND WERE TOLD TO MAINTAIN OUR ALT AND THAT THERE WAS AN OPPOSITE DIRECTION BARON 1000 FT BELOW US. I ASKED THE CTLR IF THE BARON HAD MODE C. HE SAID THAT YES HE HAD A MODE C READOUT ON THE BARON. OUR TCASII NEVER PICKED UP THE BARON AT ANY SETTING AT ANY RANGE. I DON'T KNOW HOW CLOSE WE GOT TO HIM BECAUSE I NEVER GOT A VISUAL ON HIM. BEHIND US ON THE EL NIDO 4 ARR WAS ACR Z. HE SAID THAT HE PICKED UP THE BARON AT 4 MI ON HIS TCASII. THE TCASII HAD POINTED OUT ALL OTHER TFC THAT DAY.
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.