Flight crew of an medium large transport slowed their climb rate in response to a TCASII RA.

Attributes
ACN	316533
Time
Date	199509
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : pom airport : ont
State Reference	CA
Altitude	msl bound lower : 8000 msl bound upper : 8000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	other : unknown
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	other : unknown
Flight Phase	descent other
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 15000 flight time type : 9000
ASRS Report	316533
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	other

Narrative:

On pom 6 SID out of ont, socal reclred us to level off at 7500 ft MSL as we passed 4000 ft. Subsequently, socal vectored us off the SID, heading 280 degrees, for traffic. We observed 2 aircraft on the TCASII display neither of which did socal point out to us directly. Visibility to the west was limited due to the glare from the sun off the haze. On the TCASII, the closest aircraft showed approximately 8200 ft MSL descending (we were passing 7000 ft for 7500 ft). Socal called traffic at '2 O'clock at 8200 ft descending.' we did not have the traffic visually, but the TCASII showed 2 aircraft in that direction. At that time, socal gave us a vector of 310 degrees and continue climb to 14000 ft, unrestr. (Note pom 6 SID has an at/or below restr of 8000 ft at the pom VOR). Not having the other aircraft in sight, I assumed the vector/climb would get us behind and above the traffic. As we rolled into the turn, we got a RA of 'reduce climb,' which we began to comply with by reducing our climb rate. Almost immediately thereafter, a second 'RA' of 'descend, descend now' occurred and we spotted one aircraft visually. We informed socal of the 'RA's' and he informed us the traffic never came within a mi of us. I believe he was correct, but I'm not sure he knew of the second aircraft. At no time during the climb did we level off completely and we continued the climb after the second 'RA' only after visually sighting both other aircraft.

Original NASA ASRS Text

Title: FLC OF AN MLG SLOWED THEIR CLB RATE IN RESPONSE TO A TCASII RA.

Narrative: ON POM 6 SID OUT OF ONT, SOCAL RECLRED US TO LEVEL OFF AT 7500 FT MSL AS WE PASSED 4000 FT. SUBSEQUENTLY, SOCAL VECTORED US OFF THE SID, HDG 280 DEGS, FOR TFC. WE OBSERVED 2 ACFT ON THE TCASII DISPLAY NEITHER OF WHICH DID SOCAL POINT OUT TO US DIRECTLY. VISIBILITY TO THE W WAS LIMITED DUE TO THE GLARE FROM THE SUN OFF THE HAZE. ON THE TCASII, THE CLOSEST ACFT SHOWED APPROX 8200 FT MSL DSNDING (WE WERE PASSING 7000 FT FOR 7500 FT). SOCAL CALLED TFC AT '2 O'CLOCK AT 8200 FT DSNDING.' WE DID NOT HAVE THE TFC VISUALLY, BUT THE TCASII SHOWED 2 ACFT IN THAT DIRECTION. AT THAT TIME, SOCAL GAVE US A VECTOR OF 310 DEGS AND CONTINUE CLB TO 14000 FT, UNRESTR. (NOTE POM 6 SID HAS AN AT/OR BELOW RESTR OF 8000 FT AT THE POM VOR). NOT HAVING THE OTHER ACFT IN SIGHT, I ASSUMED THE VECTOR/CLB WOULD GET US BEHIND AND ABOVE THE TFC. AS WE ROLLED INTO THE TURN, WE GOT A RA OF 'REDUCE CLB,' WHICH WE BEGAN TO COMPLY WITH BY REDUCING OUR CLB RATE. ALMOST IMMEDIATELY THEREAFTER, A SECOND 'RA' OF 'DSND, DSND NOW' OCCURRED AND WE SPOTTED ONE ACFT VISUALLY. WE INFORMED SOCAL OF THE 'RA'S' AND HE INFORMED US THE TFC NEVER CAME WITHIN A MI OF US. I BELIEVE HE WAS CORRECT, BUT I'M NOT SURE HE KNEW OF THE SECOND ACFT. AT NO TIME DURING THE CLB DID WE LEVEL OFF COMPLETELY AND WE CONTINUED THE CLB AFTER THE SECOND 'RA' ONLY AFTER VISUALLY SIGHTING BOTH OTHER ACFT.

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.