Altitude deviation altitude overshot in descent.

Attributes
ACN	316290
Time
Date	199509
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : clt
State Reference	NC
Altitude	msl bound lower : 21500 msl bound upper : 22000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : ztl
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	descent other
Route In Use	enroute other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 250 flight time total : 10000
ASRS Report	316290
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	altitude deviation : overshoot non adherence : clearance non adherence other other anomaly other
Independent Detector	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:

Cleared to FL220. First officer was flying and disconnected the autoplt. We were both distracted by radio call and call bell from cabin. We descended through FL220 to FL215 and then corrected back to assigned altitude. The first officer forgot the autoplt was off.

Original NASA ASRS Text

Title: ALTDEV ALT OVERSHOT IN DSCNT.

Narrative: CLRED TO FL220. FO WAS FLYING AND DISCONNECTED THE AUTOPLT. WE WERE BOTH DISTRACTED BY RADIO CALL AND CALL BELL FROM CABIN. WE DSNDED THROUGH FL220 TO FL215 AND THEN CORRECTED BACK TO ASSIGNED ALT. THE FO FORGOT THE AUTOPLT WAS OFF.

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.