Narrative:

Air carrier X, B757, was on susitna river visual runway 14 approach, cleared to land. Small aircraft Y, C172, was on mckenzie substation VFR departure route. (See enclosures.) X was issued traffic, informed that the traffic would be east of final, and that the traffic had him in sight. X subsequently made a climbing left turn, which actually took him directly towards the very traffic he was apparently trying to avoid. His turn also took him into a high density VFR traffic area rife with non-transponder equipped aircraft. There probably is no real reason why TCASII cannot be safely integrated into the system. It seems however, that some pilots are paying most, if not all their attention to the TCASII display and giving little thought to the other, proven means of resolving traffic sits (i.e., visual, coded rtes, etc). In this case, the pilot, after getting the RA, decided to turn left, which was not a sound decision. Perhaps it would have been helpful if the approach plate depicted the high density VFR traffic area east of the runway 14 final approach course. In any case, the pilot initiated turn took him into a far more hazardous situation than if he would have just climbed or descended according to the TCASII. I submit that if the TCASII was kept in the TA mode that close to the airport, and the pilot paid attention to what ATC was telling him, he probably wouldn't have made such a poor decision. I can't help but wonder if there isn't some problem with air carrier's procedures, training, etc. Since this is the third similar occurrence within a week of which I am aware. Callback conversation with reporter revealed the following information: reporter stated the supervisor had talked to the flight crew of air carrier X and asked why a turn was made. Flight crew stated that, from their interpretation of the TCASII scope, the aircraft looked like it was at 12 O'clock. The facility manager talked to the air carrier chief pilot about the company making turns on a TCASII RA. Facility manager said he would have the area in question put on the chart.

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Original NASA ASRS Text

Title: ACR X UNINTENDED USE OF TCASII MADE TURN AFTER RECEIVING AN RA AND HAD NMAC WITH RA ACFT. PLTDEV.

Narrative: ACR X, B757, WAS ON SUSITNA RIVER VISUAL RWY 14 APCH, CLRED TO LAND. SMA Y, C172, WAS ON MCKENZIE SUBSTATION VFR DEP RTE. (SEE ENCLOSURES.) X WAS ISSUED TFC, INFORMED THAT THE TFC WOULD BE E OF FINAL, AND THAT THE TFC HAD HIM IN SIGHT. X SUBSEQUENTLY MADE A CLBING L TURN, WHICH ACTUALLY TOOK HIM DIRECTLY TOWARDS THE VERY TFC HE WAS APPARENTLY TRYING TO AVOID. HIS TURN ALSO TOOK HIM INTO A HIGH DENSITY VFR TFC AREA RIFE WITH NON-XPONDER EQUIPPED ACFT. THERE PROBABLY IS NO REAL REASON WHY TCASII CANNOT BE SAFELY INTEGRATED INTO THE SYS. IT SEEMS HOWEVER, THAT SOME PLTS ARE PAYING MOST, IF NOT ALL THEIR ATTN TO THE TCASII DISPLAY AND GIVING LITTLE THOUGHT TO THE OTHER, PROVEN MEANS OF RESOLVING TFC SITS (I.E., VISUAL, CODED RTES, ETC). IN THIS CASE, THE PLT, AFTER GETTING THE RA, DECIDED TO TURN L, WHICH WAS NOT A SOUND DECISION. PERHAPS IT WOULD HAVE BEEN HELPFUL IF THE APCH PLATE DEPICTED THE HIGH DENSITY VFR TFC AREA E OF THE RWY 14 FINAL APCH COURSE. IN ANY CASE, THE PLT INITIATED TURN TOOK HIM INTO A FAR MORE HAZARDOUS SIT THAN IF HE WOULD HAVE JUST CLBED OR DSNDED ACCORDING TO THE TCASII. I SUBMIT THAT IF THE TCASII WAS KEPT IN THE TA MODE THAT CLOSE TO THE ARPT, AND THE PLT PAID ATTN TO WHAT ATC WAS TELLING HIM, HE PROBABLY WOULDN'T HAVE MADE SUCH A POOR DECISION. I CAN'T HELP BUT WONDER IF THERE ISN'T SOME PROB WITH ACR'S PROCS, TRAINING, ETC. SINCE THIS IS THE THIRD SIMILAR OCCURRENCE WITHIN A WK OF WHICH I AM AWARE. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR STATED THE SUPVR HAD TALKED TO THE FLC OF ACR X AND ASKED WHY A TURN WAS MADE. FLC STATED THAT, FROM THEIR INTERP OF THE TCASII SCOPE, THE ACFT LOOKED LIKE IT WAS AT 12 O'CLOCK. THE FACILITY MGR TALKED TO THE ACR CHIEF PLT ABOUT THE COMPANY MAKING TURNS ON A TCASII RA. FACILITY MGR SAID HE WOULD HAVE THE AREA IN QUESTION PUT ON THE CHART.

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.