Altitude deviation altitude overshot.

Attributes
ACN	299400
Time
Date	199503
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : mgm
State Reference	AL
Altitude	msl bound lower : 10000 msl bound upper : 11000
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : ztl
Operator	general aviation : corporate
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Flight Phase	descent other
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 120 flight time total : 9000
ASRS Report	299400
Person 2
Affiliation	Other
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	aircraft equipment problem : less severe altitude deviation : overshoot non adherence : clearance other anomaly other
Independent Detector	other controllera other flight crewa
Resolutory Action	controller : issued new clearance other
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

We were en route from dhn to mem descending to 11000 ft. During the descent the altitude preselect was not working properly. I became too preoccupied with the minor problem and failed to monitor the altitude as I should have plus we were circumnaving some small cells. Before I realized I was approaching 10000 ft, I immediately started a climb to get back to my assigned altitude of 11000 ft. At that time center asked my altitude when told she gave me 9000 ft and turned us over to mgm approach, I realized I had made a big mistake. In the future I will leave minor discrepancies to maintenance on the ground and concentrate on my primary job of flying the airplane, hoping this will never happen again.

Original NASA ASRS Text

Title: ALTDEV ALT OVERSHOT.

Narrative: WE WERE ENRTE FROM DHN TO MEM DSNDING TO 11000 FT. DURING THE DSCNT THE ALT PRESELECT WAS NOT WORKING PROPERLY. I BECAME TOO PREOCCUPIED WITH THE MINOR PROB AND FAILED TO MONITOR THE ALT AS I SHOULD HAVE PLUS WE WERE CIRCUMNAVING SOME SMALL CELLS. BEFORE I REALIZED I WAS APCHING 10000 FT, I IMMEDIATELY STARTED A CLB TO GET BACK TO MY ASSIGNED ALT OF 11000 FT. AT THAT TIME CTR ASKED MY ALT WHEN TOLD SHE GAVE ME 9000 FT AND TURNED US OVER TO MGM APCH, I REALIZED I HAD MADE A BIG MISTAKE. IN THE FUTURE I WILL LEAVE MINOR DISCREPANCIES TO MAINT ON THE GND AND CONCENTRATE ON MY PRIMARY JOB OF FLYING THE AIRPLANE, HOPING THIS WILL NEVER HAPPEN AGAIN.

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.