Air carrier climbed through occupied altitude resulting less than standard separation.

Attributes
ACN	200212
Time
Date	199201
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : dbl
State Reference	CO
Altitude	msl bound lower : 33000 msl bound upper : 33000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zdv
Operator	common carrier : air carrier
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	cruise other
Route In Use	enroute : direct
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	climbout : intermediate altitude
Route In Use	enroute : direct
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Experience	controller radar : 1
ASRS Report	200212
Person 2
Affiliation	government : faa
Function	controller : flight data
Qualification	controller : developmental
Experience	controller military : 5
ASRS Report	200707
Events
Anomaly	non adherence : published procedure non adherence : required legal separation
Independent Detector	atc equipment other atc equipment : unspecified other controllera
Resolutory Action	controller : issued new clearance
Consequence	faa : investigated
Miss Distance	horizontal : 25800 vertical : 300
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Air carrier X was northwest of dbl VOR going direct sny. Air carrier Y had departed den climbing to FL310 going direct oal. As air carrier Y approached FL310 the radar information provided to me at the sector indicated that the 2 aircraft would pass with approximately 8 mi lateral separation. I then continued to climb air carrier Y to FL390, its final requested altitude. The 2 aircraft then came into conflict. Turns were issued to both aircraft, but were not sufficient to prevent loss of separation. Problems that I feel could have possibly contributed to loss of separation are: 1) unreliability of radar information provided at the sector. I.e. Jumping data blocks and, 2) radio communication problems. Air carrier X never did acknowledge clearance to turn. Supplemental information from acn 200707: aircraft X nebound FL330 direct sny. Air carrier Y den departure wbound requesting FL390 stopped at FL310 for aircraft X. Controller estimated aircraft Y would laterally be separated from aircraft X and climb Y to FL390.

Original NASA ASRS Text

Title: ACR CLBED THROUGH OCCUPIED ALT RESULTING LTSS.

Narrative: ACR X WAS NW OF DBL VOR GOING DIRECT SNY. ACR Y HAD DEPARTED DEN CLBING TO FL310 GOING DIRECT OAL. AS ACR Y APCHED FL310 THE RADAR INFO PROVIDED TO ME AT THE SECTOR INDICATED THAT THE 2 ACFT WOULD PASS WITH APPROX 8 MI LATERAL SEPARATION. I THEN CONTINUED TO CLB ACR Y TO FL390, ITS FINAL REQUESTED ALT. THE 2 ACFT THEN CAME INTO CONFLICT. TURNS WERE ISSUED TO BOTH ACFT, BUT WERE NOT SUFFICIENT TO PREVENT LOSS OF SEPARATION. PROBLEMS THAT I FEEL COULD HAVE POSSIBLY CONTRIBUTED TO LOSS OF SEPARATION ARE: 1) UNRELIABILITY OF RADAR INFO PROVIDED AT THE SECTOR. I.E. JUMPING DATA BLOCKS AND, 2) RADIO COM PROBLEMS. ACR X NEVER DID ACKNOWLEDGE CLRNC TO TURN. SUPPLEMENTAL INFO FROM ACN 200707: ACFT X NEBOUND FL330 DIRECT SNY. ACR Y DEN DEP WBOUND REQUESTING FL390 STOPPED AT FL310 FOR ACFT X. CTLR ESTIMATED ACFT Y WOULD LATERALLY BE SEPARATED FROM ACFT X AND CLB Y TO FL390.

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.