ZKC corrects military pilot incorrect readback.

Attributes
ACN	470449
Time
Date	200004
Day	Thu
Local Time Of Day	1801 To 2400
Place
Locale Reference	navaid : sln.vortac
State Reference	KS
Altitude	msl single value : 24000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zkc.artcc
Operator	other
Make Model Name	Stratotanker 135
Operating Under FAR Part	Part 91
Flight Phase	cruise : enroute altitude change
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Experience	controller radar : 15
ASRS Report	470449
Person 2
Affiliation	government : military
Function	flight crew : captain oversight : pic
Qualification	pilot : military pilot : instrument pilot : multi engine
Events
Anomaly	altitude deviation : excursion from assigned altitude non adherence : clearance
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance flight crew : returned to assigned altitude
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Military X was given descent clearance to FL240. Pilot read back FL210. ATC corrected the readback.

Original NASA ASRS Text

Title: ZKC CORRECTS MIL PLT INCORRECT READBACK.

Narrative: MIL X WAS GIVEN DSCNT CLRNC TO FL240. PLT READ BACK FL210. ATC CORRECTED THE READBACK.

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.