Narrative:

An H/747; advised the anc ground controller that they received a TCAS RA while on final to anc. TRACON (A11) had a VFR aircraft (C207) on their frequency. The radar controller gave a traffic call and a wake turbulence advisory to the C207. The C207 confirmed they had the traffic in sight; then proceeded to fly toward the H/747 and passed 400 ft overtly from the H/747. The C207 was VFR and reported the traffic in sight. Anc is class C airspace. We have small aircraft passing under and over heavy aircraft all day long when we are in unusual runway configns. There are several corrections to the use of class C airspace at anc: 1) protect final at anc from 10 mi out. 2) have final controller resolve all conflicts; even new ones that pop up to threshold. Calls local controller when his traffic conflicts with traffic that local control has; and informs local control that his traffic has local control traffic in sight and conflict is resolved. 3) final controller needs to resolve all conflicts prior to switching the aircraft to local controller. After an open discussion amongst controllers; the conclusion was reached that multiple outdated procedures needed to be readdressed and corrected. Final radar controller protects all the way to the threshold. Not always so at anc.

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Original NASA ASRS Text

Title: ANC LCL CTLR DESCRIBED CONFLICT EVENT WHEN ARR TFC REPORTED TCAS RA WITH VFR TFC BEING WORKED BY APCH CTLR; INTRAFAC COORD FAILED.

Narrative: AN H/747; ADVISED THE ANC GND CTLR THAT THEY RECEIVED A TCAS RA WHILE ON FINAL TO ANC. TRACON (A11) HAD A VFR ACFT (C207) ON THEIR FREQ. THE RADAR CTLR GAVE A TFC CALL AND A WAKE TURB ADVISORY TO THE C207. THE C207 CONFIRMED THEY HAD THE TFC IN SIGHT; THEN PROCEEDED TO FLY TOWARD THE H/747 AND PASSED 400 FT OVERTLY FROM THE H/747. THE C207 WAS VFR AND RPTED THE TFC IN SIGHT. ANC IS CLASS C AIRSPACE. WE HAVE SMALL ACFT PASSING UNDER AND OVER HVY ACFT ALL DAY LONG WHEN WE ARE IN UNUSUAL RWY CONFIGNS. THERE ARE SEVERAL CORRECTIONS TO THE USE OF CLASS C AIRSPACE AT ANC: 1) PROTECT FINAL AT ANC FROM 10 MI OUT. 2) HAVE FINAL CTLR RESOLVE ALL CONFLICTS; EVEN NEW ONES THAT POP UP TO THRESHOLD. CALLS LCL CTLR WHEN HIS TFC CONFLICTS WITH TFC THAT LCL CTL HAS; AND INFORMS LCL CTL THAT HIS TFC HAS LCL CTL TFC IN SIGHT AND CONFLICT IS RESOLVED. 3) FINAL CTLR NEEDS TO RESOLVE ALL CONFLICTS PRIOR TO SWITCHING THE ACFT TO LCL CTLR. AFTER AN OPEN DISCUSSION AMONGST CTLRS; THE CONCLUSION WAS REACHED THAT MULTIPLE OUTDATED PROCS NEEDED TO BE READDRESSED AND CORRECTED. FINAL RADAR CTLR PROTECTS ALL THE WAY TO THE THRESHOLD. NOT ALWAYS SO AT ANC.

Data retrieved from NASA's ASRS site as of May 2009 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.