Air carrier was issued descent through an occupied altitude resulting in less than standard separati...

Attributes
ACN	199773
Time
Date	199201
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : pie
State Reference	FL
Altitude	msl bound lower : 23000 msl bound upper : 23000
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zjx
Operator	common carrier : air carrier
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	descent other
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	descent other
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Experience	controller non radar : 3 controller radar : 14
ASRS Report	199773
Person 2
Affiliation	government : faa
Function	controller : radar
Qualification	controller : developmental
Experience	controller non radar : 3
ASRS Report	200204
Events
Anomaly	non adherence : required legal separation non adherence : published procedure
Independent Detector	atc equipment other atc equipment : unspecified
Resolutory Action	controller : issued new clearance
Consequence	faa : investigated
Miss Distance	horizontal : 27186 vertical : 200
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

I was providing OJT to a radar trainee. A WX front was passing through our sector. Aircraft were deviating and requesting lower altitude to avoid turbulence. Aircraft a checked on frequency requesting deviation and was approved. He was at FL230. Later aircraft B checked on frequency. He was level FL240 which was wrong altitude for direction for the LOA. Trainee issued aircraft a clearance to cross pie VORTAC at FL210. Aircraft a did not descend immediately nor was he required to do so. Aircraft B was descended to FL230 to comply with LOA. Aircraft a finished deviating and turned into aircraft B. Conflict alert activated and aircraft a was descended to FL210 with expedite. At this point I took over and vectored both aircraft apart and requested aircraft a to report leaving FL220. Separation was lost before reaching FL220 or reaching 5 mi lateral. Supplemental information from acn 200204: my attention was taken for several moments because of a couple other traffic situations on the other side of the scope. The controller on the adjacent sector was being difficult about working with me to resolve those situations. In the meantime separation was lost.

Original NASA ASRS Text

Title: ACR WAS ISSUED DSCNT THROUGH AN OCCUPIED ALT RESULTING IN LTSS.

Narrative: I WAS PROVIDING OJT TO A RADAR TRAINEE. A WX FRONT WAS PASSING THROUGH OUR SECTOR. ACFT WERE DEVIATING AND REQUESTING LOWER ALT TO AVOID TURB. ACFT A CHKED ON FREQ REQUESTING DEV AND WAS APPROVED. HE WAS AT FL230. LATER ACFT B CHKED ON FREQ. HE WAS LEVEL FL240 WHICH WAS WRONG ALT FOR DIRECTION FOR THE LOA. TRAINEE ISSUED ACFT A CLRNC TO CROSS PIE VORTAC AT FL210. ACFT A DID NOT DSND IMMEDIATELY NOR WAS HE REQUIRED TO DO SO. ACFT B WAS DSNDED TO FL230 TO COMPLY WITH LOA. ACFT A FINISHED DEVIATING AND TURNED INTO ACFT B. CONFLICT ALERT ACTIVATED AND ACFT A WAS DSNDED TO FL210 WITH EXPEDITE. AT THIS POINT I TOOK OVER AND VECTORED BOTH ACFT APART AND REQUESTED ACFT A TO RPT LEAVING FL220. SEPARATION WAS LOST BEFORE REACHING FL220 OR REACHING 5 MI LATERAL. SUPPLEMENTAL INFO FROM ACN 200204: MY ATTN WAS TAKEN FOR SEVERAL MOMENTS BECAUSE OF A COUPLE OTHER TFC SITUATIONS ON THE OTHER SIDE OF THE SCOPE. THE CTLR ON THE ADJACENT SECTOR WAS BEING DIFFICULT ABOUT WORKING WITH ME TO RESOLVE THOSE SITUATIONS. IN THE MEANTIME SEPARATION WAS LOST.

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 was issued descent through an occupied altitude resulting in less than standard separation.