Operational error between air carrier X and air carrier Y ascending-descending situation.

Attributes
ACN	292332
Time
Date	199412
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : cvg
State Reference	OH
Altitude	msl bound lower : 19000 msl bound upper : 19000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zid
Operator	common carrier : air carrier
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 121
Flight Phase	descent other
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Experience	controller radar : 5
ASRS Report	292332
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	conflict : airborne less severe non adherence : published procedure non adherence : required legal separation
Independent Detector	other controllera
Resolutory Action	other
Consequence	faa : investigated
Miss Distance	horizontal : 25200 vertical : 300
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Aircraft #1 air carrier X. Aircraft #2 air carrier Y. Aircraft #1 departed cvg and called on frequency climbing to 12000 ft. Then issued clearance direct ape VOR climb to 17000 ft. Aircraft #2 at FL240 heading northeast issued clearance to fly heading 015 degrees and descend to FL180. Aircraft #1 told to fly heading 045 degrees and climb to FL230. Aircraft #2 told to fly heading 035 degrees. At this time conflict alert activated. Aircraft #2 told to fly heading 045 degrees. Aircraft #1 issued clearance to amend the altitude to FL190. Aircraft #2 told to maintain FL200 -- mode C indicating FL205 the pilot replied he would have to climb back to FL200. Aircraft #2 was issued further right turn to heading 065 degrees. Aircraft #2 descended to FL191 before he began to climb back to FL200. Separation was lost before the turns or altitude could be regained. From the time aircraft #2 was issued heading 035, 045, and 065 degrees till separation was lost, 1 min and 38 seconds passed aircraft #2 ground track only changed 016 degrees with 050 degrees of turns issued.

Original NASA ASRS Text

Title: OPERROR BTWN ACR X AND ACR Y ASCENDING-DSNDING SIT.

Narrative: ACFT #1 ACR X. ACFT #2 ACR Y. ACFT #1 DEPARTED CVG AND CALLED ON FREQ CLBING TO 12000 FT. THEN ISSUED CLRNC DIRECT APE VOR CLB TO 17000 FT. ACFT #2 AT FL240 HDG NE ISSUED CLRNC TO FLY HDG 015 DEGS AND DSND TO FL180. ACFT #1 TOLD TO FLY HDG 045 DEGS AND CLB TO FL230. ACFT #2 TOLD TO FLY HDG 035 DEGS. AT THIS TIME CONFLICT ALERT ACTIVATED. ACFT #2 TOLD TO FLY HDG 045 DEGS. ACFT #1 ISSUED CLRNC TO AMEND THE ALT TO FL190. ACFT #2 TOLD TO MAINTAIN FL200 -- MODE C INDICATING FL205 THE PLT REPLIED HE WOULD HAVE TO CLB BACK TO FL200. ACFT #2 WAS ISSUED FURTHER R TURN TO HDG 065 DEGS. ACFT #2 DSNDED TO FL191 BEFORE HE BEGAN TO CLB BACK TO FL200. SEPARATION WAS LOST BEFORE THE TURNS OR ALT COULD BE REGAINED. FROM THE TIME ACFT #2 WAS ISSUED HDG 035, 045, AND 065 DEGS TILL SEPARATION WAS LOST, 1 MIN AND 38 SECONDS PASSED ACFT #2 GND TRACK ONLY CHANGED 016 DEGS WITH 050 DEGS OF TURNS ISSUED.

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.