Narrative:

Small transport X was proceeding sbound on V334 from sac to rhv via sunol intersection. I was under bay approach in VMC at 6000 ft. No visible holes appeared by sunol intersection. Looking for a break in the overcast, I proceeded on the V334 course until I was advised to turn to a 120 degree heading (121.3 MHZ). Upon making the heading change to 120, LORAN indicated both TCA and arsa penetration. DME sjc 045/4.3 NM. Actual plot on sfo VFR terminal area chart shows horizontal miss of TCA by 2 NM, actual turn point at highway 680 in area outside arsa (sjc). Proceeding on heading 120 to 17.5 DME from sjc VOR, I turned to heading 150 to hollister at 7000 ft. Bay approach issued clearance to air carrier Y for descent to 6000 by gilro, cleared for the approach. I crossed the localizer at 7000 ft 20 DME sjc VOR. I observed air carrier Y descend, then pitch up applying power. Air carrier Y contacted bay approach stating his TCASII went off with a pitch up command. At this time I estimated him to be approximately 3 NM from my position with my aircraft passing to his left. He was then advised of my position and that ATC had no conflict alert. Air carrier Y indicated that I must be 'down in it' because they didn't see me. I then called approach and advised that I was still level at 7000 ft on 150 degree heading VMC on top and that I had observed the entire sequence of air carrier Y. Air carrier Y proceeded with his approach. Bay asked me if I wanted to go to monterey where it was reported to be VMC. I declined and requested the approach to sjc which was quickly given. During my approach I heard bay handoff air carrier Y to tower with a recommendation that the TCASII be checked.

Related reports:

Google
 

Original NASA ASRS Text

Title: ACR Y RECEIVED TCASII RA TO CONFLICT WITH SMT X. EVASIVE ACTION TAKEN. SEE AND AVOID CONCEPT.

Narrative: SMT X WAS PROCEEDING SBOUND ON V334 FROM SAC TO RHV VIA SUNOL INTXN. I WAS UNDER BAY APCH IN VMC AT 6000 FT. NO VISIBLE HOLES APPEARED BY SUNOL INTXN. LOOKING FOR A BREAK IN THE OVCST, I PROCEEDED ON THE V334 COURSE UNTIL I WAS ADVISED TO TURN TO A 120 DEG HDG (121.3 MHZ). UPON MAKING THE HDG CHANGE TO 120, LORAN INDICATED BOTH TCA AND ARSA PENETRATION. DME SJC 045/4.3 NM. ACTUAL PLOT ON SFO VFR TERMINAL AREA CHART SHOWS HORIZ MISS OF TCA BY 2 NM, ACTUAL TURN POINT AT HIGHWAY 680 IN AREA OUTSIDE ARSA (SJC). PROCEEDING ON HDG 120 TO 17.5 DME FROM SJC VOR, I TURNED TO HDG 150 TO HOLLISTER AT 7000 FT. BAY APCH ISSUED CLRNC TO ACR Y FOR DSCNT TO 6000 BY GILRO, CLRED FOR THE APCH. I CROSSED THE LOC AT 7000 FT 20 DME SJC VOR. I OBSERVED ACR Y DSND, THEN PITCH UP APPLYING PWR. ACR Y CONTACTED BAY APCH STATING HIS TCASII WENT OFF WITH A PITCH UP COMMAND. AT THIS TIME I ESTIMATED HIM TO BE APPROX 3 NM FROM MY POS WITH MY ACFT PASSING TO HIS L. HE WAS THEN ADVISED OF MY POS AND THAT ATC HAD NO CONFLICT ALERT. ACR Y INDICATED THAT I MUST BE 'DOWN IN IT' BECAUSE THEY DIDN'T SEE ME. I THEN CALLED APCH AND ADVISED THAT I WAS STILL LEVEL AT 7000 FT ON 150 DEG HDG VMC ON TOP AND THAT I HAD OBSERVED THE ENTIRE SEQUENCE OF ACR Y. ACR Y PROCEEDED WITH HIS APCH. BAY ASKED ME IF I WANTED TO GO TO MONTEREY WHERE IT WAS RPTED TO BE VMC. I DECLINED AND REQUESTED THE APCH TO SJC WHICH WAS QUICKLY GIVEN. DURING MY APCH I HEARD BAY HDOF ACR Y TO TWR WITH A RECOMMENDATION THAT THE TCASII BE CHKED.

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.