Crew received a clearance, descend to 3000 ft. Hearing the readback, 'ATC' reclred crew to 3600 ft.

Attributes
ACN	491860
Time
Date	200011
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : clt.airport
State Reference	NC
Altitude	msl bound lower : 3000 msl bound upper : 3600
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : clt.tracon tower : clt.tower tower : fll.tower
Operator	common carrier : air carrier
Make Model Name	B737-400
Operating Under FAR Part	Part 121
Navigation In Use	ils localizer & glide slope : 36r other
Flight Phase	descent : approach
Route In Use	approach : instrument precision arrival : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : cfi
Experience	flight time last 90 days : 200 flight time total : 14000 flight time type : 10000
ASRS Report	491860
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : instrument pilot : commercial
Events
Anomaly	altitude deviation : excursion from assigned altitude non adherence : clearance non adherence : published procedure other anomaly other
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance
Supplementary
Problem Areas	ATC Human Performance
Primary Problem	ATC Human Performance

Narrative:

Given descent to 3000 ft and turn to right base for runway 36R at clt. Read back 3000 ft and both pilots verified altitude. Controller then called and told us to climb to 3600 ft. Completed approach and landing.

Original NASA ASRS Text

Title: CREW RECEIVED A CLRNC, DSND TO 3000 FT. HEARING THE READBACK, 'ATC' RECLRED CREW TO 3600 FT.

Narrative: GIVEN DSCNT TO 3000 FT AND TURN TO R BASE FOR RWY 36R AT CLT. READ BACK 3000 FT AND BOTH PLTS VERIFIED ALT. CTLR THEN CALLED AND TOLD US TO CLB TO 3600 FT. COMPLETED APCH AND LNDG.

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.