On leveling at FL250, an MD80 crew received a TCASII RA from traffic above descending to FL260 and t...

Attributes
ACN	592230
Time
Date	200308
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	navaid : lmn.vortac
State Reference	KS
Altitude	msl bound lower : 20000 msl bound upper : 31000
Environment
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zmp.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
Aircraft 2
Controlling Facilities	artcc : zmp.artcc
Operator	general aviation : corporate
Make Model Name	Gulfstream IV
Operating Under FAR Part	Part 91
Flight Phase	descent : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Experience	controller radar : 13 controller time certified in position1 : 12
ASRS Report	592230
Person 2
Affiliation	company : air carrier
Function	flight crew : captain
Events
Anomaly	conflict : airborne less severe
Independent Detector	atc equipment : conflict alert atc equipment other atc equipment : radar/mode c aircraft equipment : tcas other controllera other flight crewa other flight crewb
Resolutory Action	controller : issued advisory flight crew : took evasive action
Consequence	faa : investigated
Miss Distance	horizontal : 600 vertical : 1000
Supplementary
Problem Areas	Aircraft ATC Human Performance Flight Crew Human Performance
Primary Problem	Ambiguous

Narrative:

Aircraft X just leveled off at FL250, sebound. Aircraft Y was in a descent from FL310 to FL260, 1 mi apart and head-on. Aircraft X advised me she was turning right and descending to FL240. Traffic was called for both aircraft. Aircraft Y was leaving FL268 descending to FL260 at the time of aircraft X's RA. No other traffic was affected.

Original NASA ASRS Text

Title: ON LEVELING AT FL250, AN MD80 CREW RECEIVED A TCASII RA FROM TFC ABOVE DSNDING TO FL260 AND TOOK EVASIVE ACTION.

Narrative: ACFT X JUST LEVELED OFF AT FL250, SEBOUND. ACFT Y WAS IN A DSCNT FROM FL310 TO FL260, 1 MI APART AND HEAD-ON. ACFT X ADVISED ME SHE WAS TURNING R AND DSNDING TO FL240. TFC WAS CALLED FOR BOTH ACFT. ACFT Y WAS LEAVING FL268 DSNDING TO FL260 AT THE TIME OF ACFT X'S RA. NO OTHER TFC WAS AFFECTED.

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.

On leveling at FL250, an MD80 crew received a TCASII RA from traffic above descending to FL260 and took evasive action.