An ARTCC radar controller report on loss of separation between 2 opposite direction aircraft with clrncs to climb and descend through each other's altitude on an expedited basis, 20 mi west of tvt, oh.

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Attributes
ACN	487000
Time
Date	200010
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	navaid : tvt.vortac
State Reference	OH
Altitude	msl bound lower : 28000 msl bound upper : 29000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zid.artcc
Operator	common carrier : air carrier
Make Model Name	B757-200
Operating Under FAR Part	Part 121
Flight Phase	descent : vacating altitude
Flight Plan	IFR
Aircraft 2
Controlling Facilities	artcc : zid.artcc
Operator	common carrier : air carrier
Make Model Name	DC-9 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	cruise : enroute altitude change
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Experience	controller military : 8 controller radar : 13 controller time certified in position1 : 10
ASRS Report	487000
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	altitude deviation : undershoot conflict : airborne less severe non adherence : required legal separation non adherence : published procedure other anomaly other
Independent Detector	atc equipment : conflict alert aircraft equipment : tcas other controllera
Resolutory Action	controller : issued new clearance none taken : insufficient time
Consequence	faa : investigated
Miss Distance	horizontal : 19800 vertical : 0
Supplementary
Problem Areas	Airspace Structure Flight Crew Human Performance ATC Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

B757-200 at FL280 descending to FL270 with DC9Q head-on, level at FL280. B757-200 cleared to FL240 and told to expedite descent. DC9Q cleared to FL290 and told to expedite climb. B757-200 advised of an RA to climb. DC9Q advised of an RA. After looking at radar data, it appears both aircraft received an RA to climb. This led to much reduced separation than if they would've followed the controller's instructions.

Original NASA ASRS Text

Title: AN ARTCC RADAR CTLR RPT ON LOSS OF SEPARATION BTWN 2 OPPOSITE DIRECTION ACFT WITH CLRNCS TO CLB AND DSND THROUGH EACH OTHER'S ALT ON AN EXPEDITED BASIS, 20 MI W OF TVT, OH.

Narrative: B757-200 AT FL280 DSNDING TO FL270 WITH DC9Q HEAD-ON, LEVEL AT FL280. B757-200 CLRED TO FL240 AND TOLD TO EXPEDITE DSCNT. DC9Q CLRED TO FL290 AND TOLD TO EXPEDITE CLB. B757-200 ADVISED OF AN RA TO CLB. DC9Q ADVISED OF AN RA. AFTER LOOKING AT RADAR DATA, IT APPEARS BOTH ACFT RECEIVED AN RA TO CLB. THIS LED TO MUCH REDUCED SEPARATION THAN IF THEY WOULD'VE FOLLOWED THE CTLR'S INSTRUCTIONS.

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.