A C414 flight crew overshot their assigned altitude when the crew did not read back the correct clearance to ZKC. Controller missed erroneous readback.

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Attributes
ACN	403880
Time
Date	199805
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : jln
State Reference	MO
Altitude	msl bound lower : 3200 msl bound upper : 4000
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zkc
Operator	common carrier : air taxi
Make Model Name	Chancellor 414A & C414
Operating Under FAR Part	Part 135
Flight Phase	descent other
Route In Use	arrival other enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air taxi
Function	flight crew : first officer
Qualification	pilot : cfi pilot : atp
Experience	flight time last 90 days : 100 flight time total : 14500 flight time type : 300
ASRS Report	403880
Person 2
Affiliation	company : air taxi
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	altitude deviation : overshoot non adherence : clearance
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance other
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

This was a routine arrival into home base of jln. Both captain and myself understood ATC to clear us to descend and maintain 3000 ft -- had been on top of broken layer, descended through it. At about 3200 ft MSL, ATC asked us to say our altitude and then said we had been cleared to 4000 ft. We advised we had understood 3000 ft (captain had set 3000 ft on altitude alerter). He then cleared us for the visual approach. Nothing more was said. Captain and I could not figure the discrepancy.

Original NASA ASRS Text

Title: A C414 FLC OVERSHOT THEIR ASSIGNED ALT WHEN THE CREW DID NOT READ BACK THE CORRECT CLRNC TO ZKC. CTLR MISSED ERRONEOUS READBACK.

Narrative: THIS WAS A ROUTINE ARR INTO HOME BASE OF JLN. BOTH CAPT AND MYSELF UNDERSTOOD ATC TO CLR US TO DSND AND MAINTAIN 3000 FT -- HAD BEEN ON TOP OF BROKEN LAYER, DSNDED THROUGH IT. AT ABOUT 3200 FT MSL, ATC ASKED US TO SAY OUR ALT AND THEN SAID WE HAD BEEN CLRED TO 4000 FT. WE ADVISED WE HAD UNDERSTOOD 3000 FT (CAPT HAD SET 3000 FT ON ALT ALERTER). HE THEN CLRED US FOR THE VISUAL APCH. NOTHING MORE WAS SAID. CAPT AND I COULD NOT FIGURE THE DISCREPANCY.

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.