Air carrier aircraft was issued a clearance through an occupied altitude resulting in less than stan...

Attributes
ACN	159483
Time
Date	199010
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : gnv
State Reference	FL
Altitude	msl bound lower : 32500 msl bound upper : 33000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zjx
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport
Navigation In Use	Other
Flight Phase	descent other
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other
Flight Phase	cruise other
Route In Use	enroute : direct
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Experience	controller non radar : 1 controller radar : 1
ASRS Report	159483
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	atc equipment other atc equipment : unspecified other controllera
Resolutory Action	controller : issued new clearance
Consequence	Other
Miss Distance	horizontal : 12000 vertical : 1500
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Aircraft #1, a swbnd medium large transport on J75 at FL330, was given clearance to FL290. This caused a confliction with aircraft #2, a nwbnd medium large transport on a direct route between lal and cty at FL310. Before automatic conflict alert was triggered, controller noticed error and reclred aircraft #1 to FL330, however, standard sep was lost. A conflicting situation in another part of the controllers sector was a contributing distraction factor.

Original NASA ASRS Text

Title: ACR ACFT WAS ISSUED A CLRNC THROUGH AN OCCUPIED ALT RESULTING IN LESS THAN STANDARD SEPARATION.

Narrative: ACFT #1, A SWBND MLG ON J75 AT FL330, WAS GIVEN CLRNC TO FL290. THIS CAUSED A CONFLICTION WITH ACFT #2, A NWBND MLG ON A DIRECT RTE BTWN LAL AND CTY AT FL310. BEFORE AUTOMATIC CONFLICT ALERT WAS TRIGGERED, CTLR NOTICED ERROR AND RECLRED ACFT #1 TO FL330, HOWEVER, STANDARD SEP WAS LOST. A CONFLICTING SITUATION IN ANOTHER PART OF THE CTLRS SECTOR WAS A CONTRIBUTING DISTR FACTOR.

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 aircraft was issued a clearance through an occupied altitude resulting in less than standard separation.