B757 flight crew has TCASII RA on final, takes evasive action.

Attributes
ACN	333800
Time
Date	199604
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : sjc
State Reference	CA
Aircraft 1
Controlling Facilities	tower : sjc
Operator	common carrier : air carrier
Make Model Name	B757 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	descent : approach
Flight Plan	IFR
Aircraft 2
Make Model Name	Cessna Aircraft Undifferentiated or Other Model
Operating Under FAR Part	Part 91
Flight Phase	descent : approach
Flight Plan	VFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	333800
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	conflict : nmac other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 100 vertical : 0
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	other

Narrative:

Land on parallel runway 30R, overtook my aircraft from behind and closed to within 200 ft of us behind my right wing. We were not advised of his position by tower and he set off a TCASII climb advisory as he merged on our scope at 5 mi range and superimposed on the aircraft symbol and +100 ft. TCASII directed an RA of 1800 FPM climb. We had no way to acquire the traffic visually since he overtook us at high speed and flew into a blind spot behind the right wing and scared the hell out of our passenger on the right side of coach. Due to previous experiences at sjc I assumed the traffic to be a student from the left runway 29 who might have overshot and been on the other tower frequency, which made this a difficult time to follow the TCASII command, but I directed it anyway and gained separation. We landed successfully despite the abrupt climb after confirming the traffic's position. I don't understand why the cessna was that fast in the air traffic area and that close to us. Many passenger were visibly upset and shaken. I called tower and made recommendations but was told that the VFR traffic was cleared to do what he did but in hindsight they would have made sure we knew about him.

Original NASA ASRS Text

Title: B757 FLC HAS TCASII RA ON FINAL, TAKES EVASIVE ACTION.

Narrative: LAND ON PARALLEL RWY 30R, OVERTOOK MY ACFT FROM BEHIND AND CLOSED TO WITHIN 200 FT OF US BEHIND MY R WING. WE WERE NOT ADVISED OF HIS POS BY TWR AND HE SET OFF A TCASII CLB ADVISORY AS HE MERGED ON OUR SCOPE AT 5 MI RANGE AND SUPERIMPOSED ON THE ACFT SYMBOL AND +100 FT. TCASII DIRECTED AN RA OF 1800 FPM CLB. WE HAD NO WAY TO ACQUIRE THE TFC VISUALLY SINCE HE OVERTOOK US AT HIGH SPD AND FLEW INTO A BLIND SPOT BEHIND THE R WING AND SCARED THE HELL OUT OF OUR PAX ON THE R SIDE OF COACH. DUE TO PREVIOUS EXPERIENCES AT SJC I ASSUMED THE TFC TO BE A STUDENT FROM THE L RWY 29 WHO MIGHT HAVE OVERSHOT AND BEEN ON THE OTHER TWR FREQ, WHICH MADE THIS A DIFFICULT TIME TO FOLLOW THE TCASII COMMAND, BUT I DIRECTED IT ANYWAY AND GAINED SEPARATION. WE LANDED SUCCESSFULLY DESPITE THE ABRUPT CLB AFTER CONFIRMING THE TFC'S POS. I DON'T UNDERSTAND WHY THE CESSNA WAS THAT FAST IN THE ATA AND THAT CLOSE TO US. MANY PAX WERE VISIBLY UPSET AND SHAKEN. I CALLED TWR AND MADE RECOMMENDATIONS BUT WAS TOLD THAT THE VFR TFC WAS CLRED TO DO WHAT HE DID BUT IN HINDSIGHT THEY WOULD HAVE MADE SURE WE KNEW ABOUT HIM.

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.