Cpr flight crew distraction with cockpit tasks and WX avoidance overshot assigned altitude.

Attributes
ACN	406130
Time
Date	199806
Day	Wed
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : lgc
State Reference	GA
Altitude	msl bound lower : 19000 msl bound upper : 21000
Environment
Flight Conditions	Marginal
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 : instrument pilot : atp
Experience	flight time last 90 days : 80 flight time total : 1450 flight time type : 150
ASRS Report	406130
Person 2
Affiliation	Other
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	altitude deviation : overshoot non adherence : clearance
Independent Detector	other flight crewa
Resolutory Action	flight crew : returned to intended course or assigned course
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

ATC advised to descend to FL190 from FL210 while I was avoiding a thunderstorm and trying to go direct to the la grange VOR. Copilot was getting the ATIS and was out of the loop. I was talking to ATC, watching the thunderstorm visually and turning left to the VOR. Autoplt failed to capture the altitude and the alerter came on 300 ft low. I went back to the assigned altitude immediately. Distrs, failure to comply with SOP's and trusting the autoplt caused the problem. Lack of attention due to distrs.

Original NASA ASRS Text

Title: CPR FLC DISTR WITH COCKPIT TASKS AND WX AVOIDANCE OVERSHOT ASSIGNED ALT.

Narrative: ATC ADVISED TO DSND TO FL190 FROM FL210 WHILE I WAS AVOIDING A TSTM AND TRYING TO GO DIRECT TO THE LA GRANGE VOR. COPLT WAS GETTING THE ATIS AND WAS OUT OF THE LOOP. I WAS TALKING TO ATC, WATCHING THE TSTM VISUALLY AND TURNING L TO THE VOR. AUTOPLT FAILED TO CAPTURE THE ALT AND THE ALERTER CAME ON 300 FT LOW. I WENT BACK TO THE ASSIGNED ALT IMMEDIATELY. DISTRS, FAILURE TO COMPLY WITH SOP'S AND TRUSTING THE AUTOPLT CAUSED THE PROB. LACK OF ATTN DUE TO DISTRS.

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.