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On vector to oak final approach course under nct control, DC10 initiates TCASII maneuver due to VFR BE33 passing in vicinity.
| Attributes | |
| ACN | 574495 |
| Time | |
| Date | 200302 |
| Day | Fri |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | intersection : cathe |
| State Reference | CA |
| Altitude | msl bound lower : 10000 msl bound upper : 10600 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : nct.tracon tower : ewr.tower |
| Operator | common carrier : air carrier |
| Make Model Name | DC-10 30 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach |
| Route In Use | arrival : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tracon : nct.tracon |
| Make Model Name | Bonanza 33 |
| 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 |
| Experience | flight time last 90 days : 50 flight time total : 7000 flight time type : 1300 |
| ASRS Report | 574495 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : second officer |
| Qualification | pilot : atp pilot : flight engineer |
| Experience | flight time last 90 days : 50 flight time total : 3000 flight time type : 300 |
| ASRS Report | 574501 |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude conflict : airborne critical |
| Independent Detector | aircraft equipment : tcas other controllera other flight crewa |
| Resolutory Action | flight crew : took evasive action |
| Miss Distance | vertical : 600 |
| Supplementary | |
| Problem Areas | Weather Environmental Factor Airspace Structure ATC Human Performance |
| Primary Problem | ATC Human Performance |
Narrative:
Talking to sierra approach, level at 10000 ft, on a southwest heading, expecting vector for approach into oakland. (Given a right turn level at 10000 ft by sierra approach.) sierra approach advised us of light aircraft traffic at our 2 O'clock position, then they gave us a right turn to a northwest heading. In the level turn, TCASII announced 'traffic.' (RA was on 12 mi scale.) then TCASII announced 'climb.' complied with RA's. Had not seen traffic yet. (He had reported visual contact on us.) after initiating aggressive climb, to approximately 10500 ft, we saw him cross from right to left, under us by about 500-700 ft. He had reported level at 9500 ft IMC to approach earlier. We responded as required to the TCASII. Glad we did. Uneventful landing at oak. P.south. When we climbed, we reported such deviation to approach, told them we had a TCASII RA, and that we complied with it. They then cleared us back to 8000 ft for approach. TCASII saved our day! Good crew effort to communicate and act.
Original NASA ASRS Text
Title: ON VECTOR TO OAK FINAL APCH COURSE UNDER NCT CTL, DC10 INITIATES TCASII MANEUVER DUE TO VFR BE33 PASSING IN VICINITY.
Narrative: TALKING TO SIERRA APCH, LEVEL AT 10000 FT, ON A SW HDG, EXPECTING VECTOR FOR APCH INTO OAKLAND. (GIVEN A R TURN LEVEL AT 10000 FT BY SIERRA APCH.) SIERRA APCH ADVISED US OF LIGHT ACFT TFC AT OUR 2 O'CLOCK POS, THEN THEY GAVE US A R TURN TO A NW HDG. IN THE LEVEL TURN, TCASII ANNOUNCED 'TFC.' (RA WAS ON 12 MI SCALE.) THEN TCASII ANNOUNCED 'CLB.' COMPLIED WITH RA'S. HAD NOT SEEN TFC YET. (HE HAD RPTED VISUAL CONTACT ON US.) AFTER INITIATING AGGRESSIVE CLB, TO APPROX 10500 FT, WE SAW HIM CROSS FROM R TO L, UNDER US BY ABOUT 500-700 FT. HE HAD RPTED LEVEL AT 9500 FT IMC TO APCH EARLIER. WE RESPONDED AS REQUIRED TO THE TCASII. GLAD WE DID. UNEVENTFUL LNDG AT OAK. P.S. WHEN WE CLBED, WE RPTED SUCH DEV TO APCH, TOLD THEM WE HAD A TCASII RA, AND THAT WE COMPLIED WITH IT. THEY THEN CLRED US BACK TO 8000 FT FOR APCH. TCASII SAVED OUR DAY! GOOD CREW EFFORT TO COMMUNICATE AND ACT.
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.