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Air carrier light transport took evasive action to avoid an spc climbing through their altitude without authorization.
| Attributes | |
| ACN | 93679 |
| Time | |
| Date | 198809 |
| Day | Thu |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : osi airport : sfo airport : nuq |
| State Reference | CA |
| Altitude | msl bound lower : 5000 msl bound upper : 6000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : oak |
| Operator | common carrier : air carrier |
| Make Model Name | Light Transport, Low Wing, 2 Turboprop Eng |
| Navigation In Use | Other Other |
| Flight Phase | cruise other descent other |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | other |
| Make Model Name | Experimental |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | departure sid : sid |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 85 flight time total : 6700 |
| ASRS Report | 93679 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | altitude deviation : overshoot conflict : airborne less severe non adherence : required legal separation |
| Independent Detector | other controllera other flight crewa |
| Resolutory Action | controller : issued new clearance flight crew : took evasive action none taken : insufficient time |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 6000 vertical : 500 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Light transport X was inbound to sfo, the first officer was flying and I was working the radios. WX was clear with 10-15 mi visibility. We were working with bay approach on 133.95. The time was about XA15. Bay approach was working with 2 spc's, which had departed from nuq. The spc's were on UHF and were assigned 5000'. I saw the first spc at 2 O'clock and 3-4 mi closing and climbing! I told the first officer, 'watch that spc.' he was still climbing and closing on our position, at which time we turned right to about a heading of 010 degrees and descended about 500' to 5500'. After the first spc passed we both saw the second spc at 12 O'clock, 2-3 mi. We knew that he would be no factor passing below and to the left. Both spc's passed us about a mile away. We returned to our assigned altitude and heading with no further incidents. Callback conversation with reporter revealed the following: reporter stated that the 2 spc's were on woodside 8 departure with cross osi at 4000', maintain 5000'. Reporter's flight was assigned 6000' because of the spc's. Reporter said that the proximity of aircraft was about 1 mi and he did not feel threatened but only cautious and aware of a need to take mild evasive action. The controller was very concerned when he saw the altitude of the first spc and directed his efforts to getting the spc out of the way of reporter's aircraft.
Original NASA ASRS Text
Title: ACR LTT TOOK EVASIVE ACTION TO AVOID AN SPC CLIMBING THROUGH THEIR ALT WITHOUT AUTHORIZATION.
Narrative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
Data retrieved from NASA's ASRS site as of August 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.