ZMA controller does not ensure altitude separation between climbing LR35 and en route MD80.

Attributes
ACN	440979
Time
Date	199906
Day	Mon
Local Time Of Day	1801 To 2400
Place
Locale Reference	navaid : lbv.vortac
State Reference	FL
Altitude	msl bound lower : 25000 msl bound upper : 25600
Environment
Flight Conditions	IMC
Light	Night
Aircraft 1
Controlling Facilities	artcc : zma.artcc
Operator	general aviation : personal
Make Model Name	Learjet 35
Operating Under FAR Part	Part 91
Flight Phase	cruise : enroute altitude change
Flight Plan	IFR
Aircraft 2
Controlling Facilities	artcc : zma.artcc
Operator	common carrier : air carrier
Make Model Name	MD-80 Series (DC-9-80) Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	cruise : level
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
ASRS Report	440979
Person 2
Affiliation	company : air carrier company other government : faa government other other
Events
Anomaly	conflict : airborne critical non adherence : published procedure non adherence : required legal separation
Independent Detector	atc equipment : conflict alert aircraft equipment : tcas other controllera other flight crewa
Resolutory Action	controller : issued advisory controller : issued new clearance flight crew : took evasive action
Consequence	faa : investigated
Miss Distance	horizontal : 0 vertical : 600
Supplementary
Problem Areas	ATC Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

MD80 (aircraft Y) wbound at FL250. LR35 (aircraft X) nwbound climbing out of FL240 to FL280. At check-in on my frequency, I advised LR35 to maintain FL240 and called traffic. MD80 climbed in response to TCASII RA. Targets merged with about 600 ft altitude difference.

Original NASA ASRS Text

Title: ZMA CTLR DOES NOT ENSURE ALT SEPARATION BTWN CLBING LR35 AND ENRTE MD80.

Narrative: MD80 (ACFT Y) WBOUND AT FL250. LR35 (ACFT X) NWBOUND CLBING OUT OF FL240 TO FL280. AT CHK-IN ON MY FREQ, I ADVISED LR35 TO MAINTAIN FL240 AND CALLED TFC. MD80 CLBED IN RESPONSE TO TCASII RA. TARGETS MERGED WITH ABOUT 600 FT ALT DIFFERENCE.

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.