TCASII alert, flight crew took evasive action, sighted conflicting aircraft, then continued climb.

Attributes
ACN	298487
Time
Date	199503
Day	Mon
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : pdz airport : ont
State Reference	CA
Altitude	msl bound lower : 8300 msl bound upper : 9500
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Navigation In Use	Other
Flight Phase	climbout : intermediate altitude
Route In Use	departure other departure sid : sid enroute airway : ont
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Flight Plan	VFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 240 flight time total : 14000 flight time type : 6400
ASRS Report	298487
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	altitude deviation : excursion from assigned altitude conflict : airborne less severe non adherence : clearance other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : returned to intended course or assigned course flight crew : took evasive action
Consequence	Other
Miss Distance	unspecified : 10000
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Climbing out and having turned east on the prado departure we had a climb clearance to 14000 ft. Departure control issued VFR traffic at 10 O'clock and 4 mi at 10100 ft. At that point we were climbing out of 9300 ft. I reduced power to idle and began to level off. At 9500 ft the TCASII issued an advisory to descend, which we did. While in the descent we got another advisory to increase descent. We did and, at the same time I got visual contact with the traffic which appeared to be descending at the same time. The other aircraft passed behind us and slightly higher although at night it is difficult to say how close. We stopped the descent and resumed our climb - now out of 8300 ft. We told ATC of all of our actions as we did them. We were shortly thereafter handed off to ZLA. ATC never said anything more about the traffic and neither did we.

Original NASA ASRS Text

Title: TCASII ALERT, FLC TOOK EVASIVE ACTION, SIGHTED CONFLICTING ACFT, THEN CONTINUED CLB.

Narrative: CLBING OUT AND HAVING TURNED E ON THE PRADO DEP WE HAD A CLB CLRNC TO 14000 FT. DEP CTL ISSUED VFR TFC AT 10 O'CLOCK AND 4 MI AT 10100 FT. AT THAT POINT WE WERE CLBING OUT OF 9300 FT. I REDUCED PWR TO IDLE AND BEGAN TO LEVEL OFF. AT 9500 FT THE TCASII ISSUED AN ADVISORY TO DSND, WHICH WE DID. WHILE IN THE DSCNT WE GOT ANOTHER ADVISORY TO INCREASE DSCNT. WE DID AND, AT THE SAME TIME I GOT VISUAL CONTACT WITH THE TFC WHICH APPEARED TO BE DSNDING AT THE SAME TIME. THE OTHER ACFT PASSED BEHIND US AND SLIGHTLY HIGHER ALTHOUGH AT NIGHT IT IS DIFFICULT TO SAY HOW CLOSE. WE STOPPED THE DSCNT AND RESUMED OUR CLB - NOW OUT OF 8300 FT. WE TOLD ATC OF ALL OF OUR ACTIONS AS WE DID THEM. WE WERE SHORTLY THEREAFTER HANDED OFF TO ZLA. ATC NEVER SAID ANYTHING MORE ABOUT THE TFC AND NEITHER DID WE.

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.