Medium large transport flight crew responds to clearance meant for another aircraft.

Attributes
ACN	319560
Time
Date	199510
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : hyp
State Reference	CA
Altitude	msl bound lower : 33400 msl bound upper : 35000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zoa
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	descent other
Route In Use	arrival other arrival star : star enroute other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : cfi pilot : commercial pilot : instrument
Experience	flight time last 90 days : 200 flight time total : 5000 flight time type : 200
ASRS Report	319560
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	altitude deviation : excursion from assigned altitude non adherence : clearance
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance other
Consequence	faa : reviewed incident with flight crew
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

While flying the aircraft we received clearance to descend out of FL350 to FL240 and at least 2000 FPM in descent. Captain acknowledged with full readback. Captain and I confirmed with each other. I then descended as instructed, but passing through FL334 we were told to climb back to FL350, that the clearance was for another flight. We started back up got to FL344 and were told to then go back down to FL240. No conflicts were noted. We were air carrier X flight ceh, the other flight was air carrier Y agh.

Original NASA ASRS Text

Title: MLG FLC RESPONDS TO CLRNC MEANT FOR ANOTHER ACFT.

Narrative: WHILE FLYING THE ACFT WE RECEIVED CLRNC TO DSND OUT OF FL350 TO FL240 AND AT LEAST 2000 FPM IN DSCNT. CAPT ACKNOWLEDGED WITH FULL READBACK. CAPT AND I CONFIRMED WITH EACH OTHER. I THEN DSNDED AS INSTRUCTED, BUT PASSING THROUGH FL334 WE WERE TOLD TO CLB BACK TO FL350, THAT THE CLRNC WAS FOR ANOTHER FLT. WE STARTED BACK UP GOT TO FL344 AND WERE TOLD TO THEN GO BACK DOWN TO FL240. NO CONFLICTS WERE NOTED. WE WERE ACR X FLT CEH, THE OTHER FLT WAS ACR Y AGH.

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.