B757 crew responds to TCASII RA while in VFR climb departing sfo.

Attributes
ACN	434122
Time
Date	199904
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : sfo.airport
State Reference	CA
Altitude	msl bound lower : 8000 msl bound upper : 8500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : o90.tracon
Operator	common carrier : air carrier
Make Model Name	B757-200
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	climbout : intermediate altitude
Route In Use	departure : on vectors
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tracon : o90.tracon
Make Model Name	Cessna 310/T310C
Operating Under FAR Part	Part 91
Flight Phase	cruise : level
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : commercial pilot : instrument pilot : multi engine pilot : cfi
Experience	flight time last 90 days : 100 flight time total : 7000 flight time type : 2000
ASRS Report	434122
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : flight engineer
Experience	flight time last 90 days : 50 flight time total : 18000 flight time type : 50
ASRS Report	434178
Events
Anomaly	altitude deviation : overshoot conflict : airborne critical non adherence : clearance non adherence : required legal separation
Independent Detector	aircraft equipment : tcas other flight crewa other flight crewb
Resolutory Action	flight crew : took evasive action
Miss Distance	horizontal : 1000 vertical : 100
Supplementary
Problem Areas	Flight Crew Human Performance Airspace Structure Aircraft ATC Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Cleared to 8000 ft. Twin traffic to the right at 8500 ft. Cleared to climb with traffic in sight. Twin cessna turned right, away from our flight path. My captain informed ATC that we will pass below traffic, but I had initiated my climb based on the twin's right turn away (belly up to us). Twin's pilot heard captain's remark and reversed turn toward us. We climbed through 8500 ft about 1000 ft abeam the twin. After my climb initiation, TCASII advisory, followed by TCASII alert to reduce climb, but we were already committed to transiting 8500 ft.

Original NASA ASRS Text

Title: B757 CREW RESPONDS TO TCASII RA WHILE IN VFR CLB DEPARTING SFO.

Narrative: CLRED TO 8000 FT. TWIN TFC TO THE R AT 8500 FT. CLRED TO CLB WITH TFC IN SIGHT. TWIN CESSNA TURNED R, AWAY FROM OUR FLT PATH. MY CAPT INFORMED ATC THAT WE WILL PASS BELOW TFC, BUT I HAD INITIATED MY CLB BASED ON THE TWIN'S R TURN AWAY (BELLY UP TO US). TWIN'S PLT HEARD CAPT'S REMARK AND REVERSED TURN TOWARD US. WE CLBED THROUGH 8500 FT ABOUT 1000 FT ABEAM THE TWIN. AFTER MY CLB INITIATION, TCASII ADVISORY, FOLLOWED BY TCASII ALERT TO REDUCE CLB, BUT WE WERE ALREADY COMMITTED TO TRANSITING 8500 FT.

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.