Air carrier takes another's clearance by mistake near mco, fl.

Attributes
ACN	459990
Time
Date	200001
Day	Tue
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : mco.airport
State Reference	FL
Altitude	msl bound lower : 3000 msl bound upper : 7500
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : mco.tracon
Operator	common carrier : air carrier
Make Model Name	B737-200
Operating Under FAR Part	Part 121
Flight Phase	descent : intermediate altitude
Route In Use	arrival : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 16000 flight time type : 10000
ASRS Report	459990
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 275 flight time total : 5500 flight time type : 1600
ASRS Report	459992
Events
Anomaly	altitude deviation : excursion from assigned altitude non adherence : clearance other anomaly other
Independent Detector	other controllera
Resolutory Action	controller : issued advisory
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Descending out of approximately 7500 ft, first officer thought he heard our flight cleared to 3000 ft. He set 3000 in the window and I acknowledged it, even though the controller was talking and I did not verify it. The controller later said we took a clearance that was given to a company aircraft. We both will verify it next time! Supplemental information from acn 459992: captain was momentarily distraction, then took first officer's word for altitude clearance, acknowledged frequency change without altitude verification.

Original NASA ASRS Text

Title: ACR TAKES ANOTHER'S CLRNC BY MISTAKE NEAR MCO, FL.

Narrative: DSNDING OUT OF APPROX 7500 FT, FO THOUGHT HE HEARD OUR FLT CLRED TO 3000 FT. HE SET 3000 IN THE WINDOW AND I ACKNOWLEDGED IT, EVEN THOUGH THE CTLR WAS TALKING AND I DID NOT VERIFY IT. THE CTLR LATER SAID WE TOOK A CLRNC THAT WAS GIVEN TO A COMPANY ACFT. WE BOTH WILL VERIFY IT NEXT TIME! SUPPLEMENTAL INFO FROM ACN 459992: CAPT WAS MOMENTARILY DISTR, THEN TOOK FO'S WORD FOR ALT CLRNC, ACKNOWLEDGED FREQ CHANGE WITHOUT ALT VERIFICATION.

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.