Flight crew sets incorrect altitude in altitude alert window.

Attributes
ACN	443060
Time
Date	199907
Day	Tue
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : new.airport
State Reference	LA
Altitude	msl bound lower : 10000 msl bound upper : 12000
Environment
Flight Conditions	VMC
Light	Dusk
Aircraft 1
Controlling Facilities	artcc : zhu.artcc
Operator	common carrier : charter
Make Model Name	Small Transport, Low Wing, 2 Turboprop Eng
Operating Under FAR Part	Part 135
Navigation In Use	other
Flight Phase	descent : vacating altitude
Flight Plan	IFR
Person 1
Affiliation	company : charter
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	controller radar : 20 flight time last 90 days : 120 flight time total : 4500 flight time type : 500
ASRS Report	443060
Person 2
Affiliation	company : charter
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial pilot : multi engine
Events
Anomaly	altitude deviation : overshoot non adherence : clearance other anomaly other
Independent Detector	aircraft equipment : altitude alert other controllera other flight crewa
Resolutory Action	controller : issued advisory 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:

Was cleared from 12000 ft to 11000 ft. Put wrong numbers in altitude alert and descended to 10000 ft. Was correcting when center called.

Original NASA ASRS Text

Title: FLC SETS INCORRECT ALT IN ALT ALERT WINDOW.

Narrative: WAS CLRED FROM 12000 FT TO 11000 FT. PUT WRONG NUMBERS IN ALT ALERT AND DSNDED TO 10000 FT. WAS CORRECTING WHEN CTR CALLED.

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.