CTLR STATES THAT NO SPECIFIC REQUIREMENT FOR ACFT TO INFORM ATC WHEN EXECUTING A TCASII RA MANEUVER. CTLR IS RESPONSIBLE FOR SEPARATION UNTIL INFORMED OF AN ACFT MANEUVER.

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NATCA HAS RECEIVED SEVERAL RPTS IN THE LAST YR THAT HAVE INVOLVED OPERATIONAL ERRORS IN WHICH THE AIR TFC CTLR INVOLVED WAS IDENTED AS THE CAUSE OF THE ERROR. THESE ERRORS ALL DEAL WITH A LOSS OF SEPARATION OF EITHER VERT OR LATERAL SEPARATION STANDARDS. THE COMMON FACTORS INVOLVED IN THESE ERRORS ARE THE CTLR HAS ALLOWED THE ACFT TO BECOME VERY CLOSE TO LOSING STANDARD SEPARATION AND HAS TAKEN ACTIONS TO INSURE SEPARATION AND THE ACFT INVOLVED ARE TCASII EQUIPPED. IN EACH OF THESE ERRORS THE PLTS WERE RECEIVING RA'S. THE PLTS RESPOND TO THE RA PROVIDED BY TCASII AND NOT THE CTL INSTRUCTIONS GIVEN BY ATC. IN EACH OF THESE SITS; NATCA FEELS IF THE PLT HAD COMPLIED WITH THE CTLR'S INSTRUCTIONS A LOSS OF SEPARATION MAY NOT HAVE OCCURRED. THE AIM AND FARS REQUIRE THE PLT TO RESPOND TO ATC INSTRUCTIONS; UNLESS; IN THE PLT'S JUDGEMENT; ACFT SAFETY WILL BE COMPROMISED OR AN EMER SIT EXISTS. THE PLT IS ADDITIONALLY REQUIRED BY LAW TO RESPOND TO AN RA; AND LASTLY COMPANY POLICY MAY REQUIRE THAT THE PLT COMPLY WITH THE RA BEFORE COMPLYING WITH ATC INSTRUCTIONS. IF A PLT IS RECEIVING INSTRUCTIONS FROM TCASII AND INSTRUCTIONS FROM ATC SIMULTANEOUSLY; THE PLT IS REQUIRED TO FOLLOW TCASII INSTRUCTIONS AND NOT ATC INSTRUCTIONS. FAA ORDER 7110.65 J STATES WHEN AN ACFT UNDER YOUR CTL JURISDICTION INFORMS YOU THAT IT IS RESPONDING TO A TCASII RA DO NOT ISSUE CTL INSTRUCTIONS THAT ARE CONTRARY TO THE RA THE CREW HAS ADVISED YOU THAT THEY ARE EXECUTING. SEVERAL QUESTIONS ARISE WITH THIS RULE. PLT TO CTLR COMS HAS NEVER BEEN CLR AS TO WHEN A PLT AND WHAT A PLT STATES TO THE CTLR. FAA ORDER 7110.65 SUGGESTS A PLT USE A CERTAIN VERBIAGE BUT MAKES NO REQUIREMENT ON THE PLT TO NOTIFY ATC THE EXACT MANEUVER TAKING PLACE. THIS LEAVES THE CTLR IN A GUESSING GAME. ANOTHER QUESTION THAT MUST BE ADDRESSED IS WHEN DOES THE PLT BECOME RESPONSIBLE FOR SEPARATION BTWN HIS ACFT AND OTHER ACFT HE MAY BE IN CONFLICT WITH AND WHEN DOES THE CTLR'S RESPONSIBILITY END? FAA ORDER 7110.65 STATES THAT ONCE THE RESPONDING ACFT HAS BEGUN A MANEUVER IN RESPONSE TO AN RA; THE CTLR IS NOT RESPONSIBLE FOR PROVIDING STANDARD SEPARATION BTWN THE ACFT THAT IS RESPONDING TO AN RA AND ANY OTHER ACFT; AIRSPACE; TERRAIN OR OBSTRUCTION. THERE IS NO ESTABLISHED PROC THAT CAN BE USED TO DETERMINE WHEN THE RESPONDING ACFT HAS BEGUN A MANEUVER IN RESPONSE TO AN RA. NATCA FEELS IT IS IMPERATIVE TO ADDRESS PLT TO CTLR COMS DURING AN RA EVENT AS A MATTER OF SAFETY. THIS SUBJECT HAS LONG BEEN LEFT UNEXPLORED BECAUSE OF THE POTENTIAL SERIOUSNESS OF THE SUBJECT. ADDITIONALLY; THERE MUST BE A PROC IN PLACE THAT WILL ALLOW THE CTLRS TO KNOW WHEN THEY ARE NO LONGER RESPONSIBLE FOR SEPARATION.