B757 captain reports a TCAS RA approaching kaddy on the arrival to las. Evasive action is taken.

Attributes
ACN	1168435
Time
Date	201404
Place
Locale Reference	LAS.Airport
State Reference	NV
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	B757 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Descent
Aircraft 2
Make Model Name	Cirrus Aircraft Undifferentiated
Person 1
Function	Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Conflict Airborne Conflict Deviation - Altitude Excursion From Assigned Altitude

Narrative:

During the tyssn 3 arrival to las; we were given kaddy at 12;000 feet and 250 by la center. Out of 13 000 feet; la center called traffic ahead; VFR at 11;500 feet; a cirrus. As we went through 12;500 feet; we received a TA quickly followed by an RA to climb. We followed the procedure; climbed to 12;500 feet before we were clear of the conflict. The TCAS display indicated the traffic was at 11;800 feet; not 12;000 [11;500 feet]. Advised la center and was switched to las vegas approach. Landed uneventfully.

Original NASA ASRS Text

Title: B757 Captain reports a TCAS RA approaching KADDY on the arrival to LAS. Evasive action is taken.

Narrative: During the TYSSN 3 arrival to LAS; we were given KADDY at 12;000 feet and 250 by LA Center. Out of 13 000 feet; LA Center called traffic ahead; VFR at 11;500 feet; a Cirrus. As we went through 12;500 feet; we received a TA quickly followed by an RA to climb. We followed the procedure; climbed to 12;500 feet before we were clear of the conflict. The TCAS display indicated the traffic was at 11;800 feet; not 12;000 [11;500 feet]. Advised LA Center and was switched to Las Vegas Approach. Landed uneventfully.

Data retrieved from NASA's ASRS site 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.