Air carrier came in close proximity to converging IFR traffic resulting in less than standard separa...

Attributes
ACN	139711
Time
Date	199003
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : oal
State Reference	NV
Altitude	msl bound lower : 34000 msl bound upper : 36000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zoa
Operator	other
Make Model Name	Military Trainer
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	cruise other
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
ASRS Report	139711
Person 2
Affiliation	government : military
Function	flight crew : captain oversight : pic
Qualification	pilot : military
Events
Anomaly	non adherence : required legal separation other anomaly other
Independent Detector	atc equipment other atc equipment : unspecified other controllera
Resolutory Action	controller : issued new clearance
Consequence	Other
Miss Distance	horizontal : 24000 vertical : 0
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

MTR X was sebnd from fmg to bty climbing to FL370. Air carrier Y was 15 east of oal direct hyp at FL350. When the aircraft were approximately 80 mi apart, the potential conflict was noted by myself and the associate controller. We continued to monitor the situation and decided it wouldn't be a factor. About 10 northwest of oal MTR X appeared to level off at FL350. At this time, sep did not appear insured, so I descended air carrier Y to FL310 and expedited MTR X to FL370. These actions also did not appear to help, so I issued MTR X a heading of 160 degree and air carrier Y a heading of 300 degree. MTR X's track did not change nor, considering the type aircraft, did he climb well enough to attain sep.

Original NASA ASRS Text

Title: ACR CAME IN CLOSE PROX TO CONVERGING IFR TRAFFIC RESULTING IN LESS THAN STANDARD SEPARATION.

Narrative: MTR X WAS SEBND FROM FMG TO BTY CLBING TO FL370. ACR Y WAS 15 E OF OAL DIRECT HYP AT FL350. WHEN THE ACFT WERE APPROX 80 MI APART, THE POTENTIAL CONFLICT WAS NOTED BY MYSELF AND THE ASSOCIATE CTLR. WE CONTINUED TO MONITOR THE SITUATION AND DECIDED IT WOULDN'T BE A FACTOR. ABOUT 10 NW OF OAL MTR X APPEARED TO LEVEL OFF AT FL350. AT THIS TIME, SEP DID NOT APPEAR INSURED, SO I DSNDED ACR Y TO FL310 AND EXPEDITED MTR X TO FL370. THESE ACTIONS ALSO DID NOT APPEAR TO HELP, SO I ISSUED MTR X A HDG OF 160 DEG AND ACR Y A HDG OF 300 DEG. MTR X'S TRACK DID NOT CHANGE NOR, CONSIDERING THE TYPE ACFT, DID HE CLB WELL ENOUGH TO ATTAIN SEP.

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.

Air carrier came in close proximity to converging IFR traffic resulting in less than standard separation.