Air carrier X TCASII TA RA evasive action taken from VFR small transport Y. See and avoid concept.

Attributes
ACN	211166
Time
Date	199205
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : trm
State Reference	CA
Altitude	msl bound lower : 12500 msl bound upper : 12500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zla
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	climbout : intermediate altitude
Route In Use	departure sid : sid
Flight Plan	IFR
Aircraft 2
Operator	general aviation : personal
Make Model Name	Small Transport, Low Wing, 2 Recip Eng
Flight Phase	cruise other
Route In Use	enroute : direct
Flight Plan	VFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : instrument pilot : commercial
Experience	flight time last 90 days : 210 flight time total : 5000 flight time type : 600
ASRS Report	211166
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	conflict : airborne less severe
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 1500 vertical : 500
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	other

Narrative:

During climb out on the prado 2 departure thermal transition, as I was climbing out of 12500 ft to 14000 ft assigned, the captain and I observed a TCASII target at about 12 to 1 O'clock position and 700 ft above us about 3 to 5 mi ahead of us. ZLA gave us a radio frequency change to 125.8 (this was incorrect and helped cause the traffic conflict) and did not advise us of the traffic or its altitude. As we tried to check in on the new frequency, the TCASII system worked just as advertised by alerting us to the developing conflict. First, it called a TA followed shortly by monitor climb rate (with the proper red arc not to fly into on my vsi). Both the captain and I saw the traffic, an small transport Y. I followed the TCASII warning and stopped my climb. We were able to get the correct radio frequency of 125.85 and check in with the controller. After I got several mi ahead of the traffic, I climbed to 14000 ft. The controllers never mentioned the traffic on old or the new frequencys. My conclusion can only be that the first controller did not see our conflict traffic, but if he did, he should have stopped our climb or at least called it out. We may have missed the radio frequency due to our concern over the TCASII warning and avoidance maneuver.

Original NASA ASRS Text

Title: ACR X TCASII TA RA EVASIVE ACTION TAKEN FROM VFR SMT Y. SEE AND AVOID CONCEPT.

Narrative: DURING CLBOUT ON THE PRADO 2 DEP THERMAL TRANSITION, AS I WAS CLBING OUT OF 12500 FT TO 14000 FT ASSIGNED, THE CAPT AND I OBSERVED A TCASII TARGET AT ABOUT 12 TO 1 O'CLOCK POS AND 700 FT ABOVE US ABOUT 3 TO 5 MI AHEAD OF US. ZLA GAVE US A RADIO FREQ CHANGE TO 125.8 (THIS WAS INCORRECT AND HELPED CAUSE THE TFC CONFLICT) AND DID NOT ADVISE US OF THE TFC OR ITS ALT. AS WE TRIED TO CHK IN ON THE NEW FREQ, THE TCASII SYS WORKED JUST AS ADVERTISED BY ALERTING US TO THE DEVELOPING CONFLICT. FIRST, IT CALLED A TA FOLLOWED SHORTLY BY MONITOR CLB RATE (WITH THE PROPER RED ARC NOT TO FLY INTO ON MY VSI). BOTH THE CAPT AND I SAW THE TFC, AN SMT Y. I FOLLOWED THE TCASII WARNING AND STOPPED MY CLB. WE WERE ABLE TO GET THE CORRECT RADIO FREQ OF 125.85 AND CHK IN WITH THE CTLR. AFTER I GOT SEVERAL MI AHEAD OF THE TFC, I CLBED TO 14000 FT. THE CTLRS NEVER MENTIONED THE TFC ON OLD OR THE NEW FREQS. MY CONCLUSION CAN ONLY BE THAT THE FIRST CTLR DID NOT SEE OUR CONFLICT TFC, BUT IF HE DID, HE SHOULD HAVE STOPPED OUR CLB OR AT LEAST CALLED IT OUT. WE MAY HAVE MISSED THE RADIO FREQ DUE TO OUR CONCERN OVER THE TCASII WARNING AND AVOIDANCE MANEUVER.

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.