Evasive action by air carrier X when TCASII RA for VFR traffic not in sight.

Attributes
ACN	296155
Time
Date	199502
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : tus
State Reference	AZ
Altitude	msl bound lower : 12000 msl bound upper : 12000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : tus
Operator	common carrier : air carrier
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude
Route In Use	enroute airway : tus
Flight Plan	IFR
Aircraft 2
Make Model Name	Cessna Aircraft Undifferentiated or Other Model
Operating Under FAR Part	other : unknown
Flight Phase	climbout : intermediate altitude
Flight Plan	VFR
Person 1
Affiliation	government : faa
Function	controller : departure
Qualification	controller : radar
Experience	controller radar : 20
ASRS Report	296155
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	conflict : airborne less severe other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 6000 vertical : 500
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

Air carrier X was climbing out of tucson in route to pxr on the tus 318 degree radial. Uga Y was climbing out of tucson for pxr on a VFR flight to 14500 ft. Traffic was issued to uga Y when the aircraft were about 4 mi apart and 1000 ft. Uga Y did not respond to the traffic calls, twice. Air carrier X reacted to a TCASII RA and descended to avoid the traffic. When the aircraft were 3 mi apart and 1000 ft I was able to establish radio communications with uga Y. I informed him I had been trying to issue traffic to him and asked if he had seen the traffic. He said no. Callback conversation with reporter revealed the following information: reporter indicated that he had issued traffic to air carrier X but the traffic was not sighted and subsequently took evasive action when the TCASII RA alerted. Reporter seemed to think the VFR traffic was a single engine cessna.

Original NASA ASRS Text

Title: EVASIVE ACTION BY ACR X WHEN TCASII RA FOR VFR TFC NOT IN SIGHT.

Narrative: ACR X WAS CLBING OUT OF TUCSON IN RTE TO PXR ON THE TUS 318 DEG RADIAL. UGA Y WAS CLBING OUT OF TUCSON FOR PXR ON A VFR FLT TO 14500 FT. TFC WAS ISSUED TO UGA Y WHEN THE ACFT WERE ABOUT 4 MI APART AND 1000 FT. UGA Y DID NOT RESPOND TO THE TFC CALLS, TWICE. ACR X REACTED TO A TCASII RA AND DSNDED TO AVOID THE TFC. WHEN THE ACFT WERE 3 MI APART AND 1000 FT I WAS ABLE TO ESTABLISH RADIO COMS WITH UGA Y. I INFORMED HIM I HAD BEEN TRYING TO ISSUE TFC TO HIM AND ASKED IF HE HAD SEEN THE TFC. HE SAID NO. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR INDICATED THAT HE HAD ISSUED TFC TO ACR X BUT THE TFC WAS NOT SIGHTED AND SUBSEQUENTLY TOOK EVASIVE ACTION WHEN THE TCASII RA ALERTED. RPTR SEEMED TO THINK THE VFR TFC WAS A SINGLE ENG CESSNA.

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.