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EMB135 flight receives a TCAS warning; encounters another aircraft during the loop 1 departure fro sjc and takes evasive action.
| Attributes | |
| ACN | 695077 |
| Time | |
| Date | 200604 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : sjc.airport |
| State Reference | CA |
| Altitude | msl single value : 9600 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : nct.tracon tower : den.tower |
| Operator | general aviation : corporate |
| Make Model Name | EMB ERJ 135 ER&LR |
| Operating Under FAR Part | Part 91 |
| Flight Phase | climbout : initial |
| Route In Use | departure sid : loop.one |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | general aviation : personal |
| Make Model Name | Cessna Single Piston Undifferentiated or Other Model |
| Operating Under FAR Part | Part 91 |
| Flight Phase | cruise : level |
| Person 1 | |
| Affiliation | company : corporate |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 100 flight time total : 10000 flight time type : 2500 |
| ASRS Report | 695077 |
| Person 2 | |
| Affiliation | other |
| Function | flight crew : single pilot |
| Events | |
| Anomaly | conflict : airborne less severe |
| Independent Detector | aircraft equipment : tcas other flight crewa |
| Resolutory Action | flight crew : returned to original clearance flight crew : took precautionary avoidance action |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Airspace Structure |
| Primary Problem | Flight Crew Human Performance |
Narrative:
Climbing through 9600 ft on the loupe departure; wbound into the sun; received a no altitude TCAS alert. Spotted cessna (C172 or C182) ahead and above. Leveled off; reported to controller; and maneuvered for lateral separation. Norcal controller said he was not showing the aircraft; although we continued to get a TCAS target. Called norcal on landing and was told that radar coverage in that area was impacted by being essentially over the antenna. Observations: 1) TCAS was a great idea! 2) cruising over sjc-sfo at 10500 ft without talking to approach is legal but not smart. 3) above 10000 ft the cessna should have been transmitting altitude information. 4) although most no-altitude transponder targets on TCAS are very low altitude; you can't make that assumption.
Original NASA ASRS Text
Title: EMB135 FLT RECEIVES A TCAS WARNING; ENCOUNTERS ANOTHER ACFT DURING THE LOOP 1 DEP FRO SJC AND TAKES EVASIVE ACTION.
Narrative: CLBING THROUGH 9600 FT ON THE LOUPE DEP; WBOUND INTO THE SUN; RECEIVED A NO ALT TCAS ALERT. SPOTTED CESSNA (C172 OR C182) AHEAD AND ABOVE. LEVELED OFF; RPTED TO CTLR; AND MANEUVERED FOR LATERAL SEPARATION. NORCAL CTLR SAID HE WAS NOT SHOWING THE ACFT; ALTHOUGH WE CONTINUED TO GET A TCAS TARGET. CALLED NORCAL ON LNDG AND WAS TOLD THAT RADAR COVERAGE IN THAT AREA WAS IMPACTED BY BEING ESSENTIALLY OVER THE ANTENNA. OBSERVATIONS: 1) TCAS WAS A GREAT IDEA! 2) CRUISING OVER SJC-SFO AT 10500 FT WITHOUT TALKING TO APCH IS LEGAL BUT NOT SMART. 3) ABOVE 10000 FT THE CESSNA SHOULD HAVE BEEN XMITTING ALT INFO. 4) ALTHOUGH MOST NO-ALT XPONDER TARGETS ON TCAS ARE VERY LOW ALT; YOU CAN'T MAKE THAT ASSUMPTION.
Data retrieved from NASA's ASRS site as of January 2009 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.