|37000 Feet||Browse and search NASA's
Aviation Safety Reporting System
|Local Time Of Day||1201 To 1800|
|Locale Reference||atc facility : fim|
|Altitude||msl bound lower : 1200|
msl bound upper : 1200
|Controlling Facilities||artcc : lax|
|Operator||common carrier : air carrier|
|Make Model Name||Large Transport, Low Wing, 3 Turbojet Eng|
|Flight Phase||descent other|
|Route In Use||arrival : profile descent|
|Make Model Name||Small Transport, Low Wing, 2 Recip Eng|
|Affiliation||company : air carrier|
|Function||flight crew : first officer|
|Qualification||pilot : atp|
pilot : flight engineer
|Experience||flight time last 90 days : 200|
flight time total : 6000
flight time type : 2000
|Function||controller : radar|
|Qualification||controller : radar|
|Anomaly||conflict : airborne less severe|
other anomaly other
|Independent Detector||other flight crewa|
|Resolutory Action||flight crew : took evasive action|
|Miss Distance||horizontal : 2000|
vertical : 0
|Air Traffic Incident||other|
On profile descent around 12000', I saw a light twin banking sharply at about the 2-3 O'clock position. The twin had obviously seen us and was turning to avoid, but I took control of the aircraft and banked left to ensure sep. We asked center if he was showing the aircraft on radar, and he showed nothing but said he would look for him. We were then handed off to approach. The traffic was difficult to see due to low sun at the 1-2 O'clock position and haze. Mandatory xponders with altitude encoding capability on all aircraft would have alerted ATC to the potential conflict, and would have alerted us to the problem much sooner than visibility acquisition provided.
Original NASA ASRS Text
Title: LGT TOOK EVASIVE ACTION TO ASSURE CLRNC WITH SMT.
Narrative: ON PROFILE DSCNT AROUND 12000', I SAW A LIGHT TWIN BANKING SHARPLY AT ABOUT THE 2-3 O'CLOCK POS. THE TWIN HAD OBVIOUSLY SEEN US AND WAS TURNING TO AVOID, BUT I TOOK CTL OF THE ACFT AND BANKED LEFT TO ENSURE SEP. WE ASKED CENTER IF HE WAS SHOWING THE ACFT ON RADAR, AND HE SHOWED NOTHING BUT SAID HE WOULD LOOK FOR HIM. WE WERE THEN HANDED OFF TO APCH. THE TFC WAS DIFFICULT TO SEE DUE TO LOW SUN AT THE 1-2 O'CLOCK POS AND HAZE. MANDATORY XPONDERS WITH ALT ENCODING CAPABILITY ON ALL ACFT WOULD HAVE ALERTED ATC TO THE POTENTIAL CONFLICT, AND WOULD HAVE ALERTED US TO THE PROB MUCH SOONER THAN VIS ACQUISITION PROVIDED.
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.