Wrong aircraft got clearance to descend from FL350 to FL240.

Attributes
ACN	90188
Time
Date	198806
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : toc
State Reference	GA
Altitude	msl bound lower : 34000 msl bound upper : 35000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zma
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	cruise other descent other
Route In Use	enroute airway : j48
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : flight engineer pilot : cfi pilot : atp
Experience	flight time last 90 days : 180 flight time total : 12000 flight time type : 7000
ASRS Report	90188
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Experience	flight time last 90 days : 180 flight time total : 7500 flight time type : 1500
ASRS Report	90182
Events
Anomaly	altitude deviation : excursion from assigned altitude non adherence : published procedure other anomaly other
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance
Consequence	Other
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Deviation

Narrative:

Approximately 90 mi northeast of TOC inbound to atl on J48 I acknowledged a clearance to FL240. The clearance readback included the airline and flight number. Leaving FL340 atlanta center requested that we check our altitude, '1000' low and descending'. I stopped the descent and informed center that we were descending to FL240 as clrd. Center said that the clearance had been for another flight, but that there was no traffic conflict. We were air carrier a xyz the other flight was air carrier a yxz.

Original NASA ASRS Text

Title: WRONG ACFT GOT CLRNC TO DESCEND FROM FL350 TO FL240.

Narrative: APPROX 90 MI NE OF TOC INBND TO ATL ON J48 I ACKNOWLEDGED A CLRNC TO FL240. THE CLRNC READBACK INCLUDED THE AIRLINE AND FLT NUMBER. LEAVING FL340 ATLANTA CENTER REQUESTED THAT WE CHECK OUR ALT, '1000' LOW AND DSNDING'. I STOPPED THE DSCNT AND INFORMED CENTER THAT WE WERE DSNDING TO FL240 AS CLRD. CENTER SAID THAT THE CLRNC HAD BEEN FOR ANOTHER FLT, BUT THAT THERE WAS NO TFC CONFLICT. WE WERE ACR A XYZ THE OTHER FLT WAS ACR A YXZ.

Data retrieved from NASA's ASRS site as of August 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.