Medium large transport overshot descent altitude by 400 ft.

Attributes
ACN	344950
Time
Date	199608
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : air
State Reference	OH
Altitude	msl bound lower : 9600 msl bound upper : 10000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zob
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	cruise other descent other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument pilot : flight engineer
Experience	flight time last 90 days : 270 flight time total : 10000 flight time type : 3000
ASRS Report	344950
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	altitude deviation : overshoot non adherence : clearance
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : returned to intended course or assigned course flight crew : became reoriented
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Clearance to cross wiske, 10000 ft, 250 KTS. Noticed our altitude of 9600 ft and climbed immediately back to 10000 ft. The confusion occurred because the intersection was at 9 DME, and the captain had 9 on his mind instead of 10. 10000 ft was selected in the set altitude window. An autoplt with altitude capture would alleviate such mistakes. No traffic conflict occurred.

Original NASA ASRS Text

Title: MLG OVERSHOT DSCNT ALT BY 400 FT.

Narrative: CLRNC TO CROSS WISKE, 10000 FT, 250 KTS. NOTICED OUR ALT OF 9600 FT AND CLBED IMMEDIATELY BACK TO 10000 FT. THE CONFUSION OCCURRED BECAUSE THE INTXN WAS AT 9 DME, AND THE CAPT HAD 9 ON HIS MIND INSTEAD OF 10. 10000 FT WAS SELECTED IN THE SET ALT WINDOW. AN AUTOPLT WITH ALT CAPTURE WOULD ALLEVIATE SUCH MISTAKES. NO TFC CONFLICT OCCURRED.

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.