TRACON controller described a TCAS RA event noting the minimum VFR/IFR separation standard of 500 fe...

Attributes
ACN	976904
Time
Date	201110
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.TRACON
State Reference	US
Aircraft 1
Make Model Name	Brasilia EMB-120 All Series
Flight Phase	Cruise
Flight Plan	IFR
Aircraft 2
Make Model Name	Bonanza 35
Flight Phase	Cruise
Person 1
Function	Approach Departure
Qualification	Air Traffic Control Fully Certified
Events
Anomaly	Conflict Airborne Conflict Deviation - Altitude Excursion From Assigned Altitude

Narrative:

Brasilia was southbound on the arrival level at 7000; bonanza was westbound VFR at 6500. Traffic had been issued to both aircraft twice. The bonanza had the brasilia in sight. Brasilia started a climb as they crossed above the bonanza due to a TCAS RA. This event happened because I descended brasilia to cross 500 feet above the bonanza. When possible it is best to use additional separation when an aircraft with TCAS is involved.

Original NASA ASRS Text

Title: TRACON Controller described a TCAS RA event noting the minimum VFR/IFR separation standard of 500 feet frequently results in TCAS alerts.

Narrative: Brasilia was southbound on the arrival level at 7000; Bonanza was westbound VFR at 6500. Traffic had been issued to both aircraft twice. The Bonanza had the Brasilia in sight. Brasilia started a climb as they crossed above the Bonanza due to a TCAS RA. This event happened because I descended Brasilia to cross 500 feet above the Bonanza. When possible it is best to use additional separation when an aircraft with TCAS is involved.

Data retrieved from NASA's ASRS site as of April 2012 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.

TRACON controller described a TCAS RA event noting the minimum VFR/IFR separation standard of 500 feet frequently results in TCAS alerts.