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Medium large transport saw small transport pass in close proximity, no traffic advisory from ARTCC, small transport VFR on top.
| Attributes | |
| ACN | 91613 |
| Time | |
| Date | 198807 |
| Day | Sun |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : rzs |
| State Reference | CA |
| Altitude | msl bound lower : 17500 msl bound upper : 17500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : mdcs |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | enroute airway : zla |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Small Transport, Low Wing, 2 Turboprop Eng |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 220 flight time total : 15000 flight time type : 8000 |
| ASRS Report | 91613 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : nmac non adherence : published procedure |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : insufficient time |
| Consequence | Other |
| Miss Distance | horizontal : 400 vertical : 0 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
ZLA center controller had cleared us (medium large transport X) direct rzs, climb to FL230. Passing thru 17000', I called for `altimeters' 29.92 and turned the landing lights off, when I noticed an air carrier small transport Y passing off the left wing at our altitude in the opposite direction. First officer, who was flying the aircraft, saw the small transport Y at the same time. Controller issued traffic advisory to the small transport Y after he had passed us. He never pointed the aircraft out to us. When I asked him if small transport Y was flying VFR, he replied 'yes, VFR on top, thanks for the call' and turned us over to the next frequency. We never heard any advisories for either small transport Y or ourselves about the impending conflict except for the one call described above.
Original NASA ASRS Text
Title: MLG SAW SMT PASS IN CLOSE PROX, NO TRAFFIC ADVISORY FROM ARTCC, SMT VFR ON TOP.
Narrative: ZLA CTR CTLR HAD CLRED US (MLG X) DIRECT RZS, CLB TO FL230. PASSING THRU 17000', I CALLED FOR `ALTIMETERS' 29.92 AND TURNED THE LNDG LIGHTS OFF, WHEN I NOTICED AN ACR SMT Y PASSING OFF THE L WING AT OUR ALT IN THE OPPOSITE DIRECTION. F/O, WHO WAS FLYING THE ACFT, SAW THE SMT Y AT THE SAME TIME. CTLR ISSUED TFC ADVISORY TO THE SMT Y AFTER HE HAD PASSED US. HE NEVER POINTED THE ACFT OUT TO US. WHEN I ASKED HIM IF SMT Y WAS FLYING VFR, HE REPLIED 'YES, VFR ON TOP, THANKS FOR THE CALL' AND TURNED US OVER TO THE NEXT FREQ. WE NEVER HEARD ANY ADVISORIES FOR EITHER SMT Y OR OURSELVES ABOUT THE IMPENDING CONFLICT EXCEPT FOR THE ONE CALL DESCRIBED ABOVE.
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.