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Air carrier large transport on SID departure from smf given altitude restriction by ARTCC controller for VFR traffic above. VFR traffic not in contact with ATC.
| Attributes | |
| ACN | 149264 |
| Time | |
| Date | 199006 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : sac airport : smf |
| State Reference | CA |
| Altitude | msl bound lower : 9000 msl bound upper : 9500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zoa |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | departure other departure sid : sid |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Small Transport, Low Wing, 2 Recip Eng |
| Flight Phase | cruise other |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument pilot : flight engineer |
| Experience | flight time last 90 days : 150 flight time total : 4100 flight time type : 900 |
| ASRS Report | 149264 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : airborne less severe other anomaly other |
| Independent Detector | other controllera other flight crewa |
| Resolutory Action | controller : issued new clearance other |
| Consequence | Other |
| Miss Distance | horizontal : 0 vertical : 500 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | other |
Narrative:
While climbing out of smf on the dudes 7 departure, our flight was given clearance to 11000'. Approximately 30-45 seconds later the ZOA controller called out traffic at our 1-2 O'clock position, northbound at 9500', converging. Approximately 10 seconds later we were told to level at 9000' if we did not have visibility contact with the aircraft. We were now at 8000' and still climbing. At that time we made visibility contact and began our level off at 9000', even though we now had the aircraft in sight. About the time we leveled off at 9000' the other aircraft, a twin engine small transport Y, passed directly over us at what I believed to be 9500', or just 500' of sep. The controller was not in radio contact with the aircraft. Had ATC not called out the traffic and stopped our climb at 9000', there could possibly have been a disaster.
Original NASA ASRS Text
Title: ACR LGT ON SID DEP FROM SMF GIVEN ALT RESTRICTION BY ARTCC CTLR FOR VFR TRAFFIC ABOVE. VFR TRAFFIC NOT IN CONTACT WITH ATC.
Narrative: WHILE CLBING OUT OF SMF ON THE DUDES 7 DEP, OUR FLT WAS GIVEN CLRNC TO 11000'. APPROX 30-45 SECS LATER THE ZOA CTLR CALLED OUT TFC AT OUR 1-2 O'CLOCK POS, NBND AT 9500', CONVERGING. APPROX 10 SECS LATER WE WERE TOLD TO LEVEL AT 9000' IF WE DID NOT HAVE VIS CONTACT WITH THE ACFT. WE WERE NOW AT 8000' AND STILL CLBING. AT THAT TIME WE MADE VIS CONTACT AND BEGAN OUR LEVEL OFF AT 9000', EVEN THOUGH WE NOW HAD THE ACFT IN SIGHT. ABOUT THE TIME WE LEVELED OFF AT 9000' THE OTHER ACFT, A TWIN ENG SMT Y, PASSED DIRECTLY OVER US AT WHAT I BELIEVED TO BE 9500', OR JUST 500' OF SEP. THE CTLR WAS NOT IN RADIO CONTACT WITH THE ACFT. HAD ATC NOT CALLED OUT THE TFC AND STOPPED OUR CLB AT 9000', THERE COULD POSSIBLY HAVE BEEN A DISASTER.
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.