CL65 and military learjet had less than legal separation in ZJX class a airspace.

Attributes
ACN	503730
Time
Date	200103
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	navaid : tlh.vortac
State Reference	FL
Altitude	msl bound lower : 27000 msl bound upper : 28000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zjx.artcc
Operator	common carrier : air carrier
Make Model Name	Regional Jet CL65, Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	descent : vacating altitude
Flight Plan	IFR
Aircraft 2
Controlling Facilities	artcc : zjx.artcc
Operator	other
Make Model Name	Gates Learjet Corp Undifferentiated or Other Model
Operating Under FAR Part	other : military
Flight Phase	descent : vacating altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : cfi
Experience	flight time last 90 days : 70 flight time total : 7500 flight time type : 70
ASRS Report	503730
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	conflict : airborne critical non adherence : required legal separation
Independent Detector	aircraft equipment : tcas other flight crewa other flight crewb other other : 5
Resolutory Action	flight crew : took evasive action none taken : detected after the fact other
Miss Distance	horizontal : 500 vertical : 50
Supplementary
Problem Areas	FAA Flight Crew Human Performance ATC Human Performance
Primary Problem	Ambiguous

Narrative:

We were cleared from FL280 to FL270 by ZJX. First received traffic alert on TCASII, then 5 seconds nothing followed by immediate climb command on TCASII RA. I observed USAF learjet on left side on course conflicting with ours. Disengaged autoplt, turned right, immediately climbed to avoid learjet. Learjet rolled opposite at almost same time. Flight attendant did fall as a result of maneuver with no injury visible or preventing performance of duties.

Original NASA ASRS Text

Title: CL65 AND MIL LEARJET HAD LESS THAN LEGAL SEPARATION IN ZJX CLASS A AIRSPACE.

Narrative: WE WERE CLRED FROM FL280 TO FL270 BY ZJX. FIRST RECEIVED TFC ALERT ON TCASII, THEN 5 SECONDS NOTHING FOLLOWED BY IMMEDIATE CLB COMMAND ON TCASII RA. I OBSERVED USAF LEARJET ON L SIDE ON COURSE CONFLICTING WITH OURS. DISENGAGED AUTOPLT, TURNED R, IMMEDIATELY CLBED TO AVOID LEARJET. LEARJET ROLLED OPPOSITE AT ALMOST SAME TIME. FLT ATTENDANT DID FALL AS A RESULT OF MANEUVER WITH NO INJURY VISIBLE OR PREVENTING PERFORMANCE OF DUTIES.

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.