Medium large transport overshoots assigned altitude during climb.

Attributes
ACN	90511
Time
Date	198807
Day	Thu
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : sdf
State Reference	KY
Altitude	msl bound lower : 22000 msl bound upper : 22400
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zid tower : ord
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	climbout : intermediate altitude cruise 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 : 150 flight time type : 150
ASRS Report	90511
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	aircraft equipment problem : less severe altitude deviation : overshoot non adherence : clearance
Independent Detector	other controllera 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:

On climb out from cvg to bna, cleared to FL220, approaching level off my attention was distracted by a call from the cabin. As I answered the F/a's, I tried to engage our performance data computer in a cruise mode. Approaching FL220 it would not engage. ATC then called to query our altitude. We were at FL224 and still climbing. Our altitude select was showing FL230, even though we had set it for FL220. I am sure we had set FL220 in the altitude select originally because the first officer and I had confirmed it earlier. I believe this altitude incursion was the result of an unscheduled change in the altitude select on our MCP.

Original NASA ASRS Text

Title: MLG OVERSHOOTS ASSIGNED ALT DURING CLIMB.

Narrative: ON CLBOUT FROM CVG TO BNA, CLRED TO FL220, APCHING LEVEL OFF MY ATTN WAS DISTRACTED BY A CALL FROM THE CABIN. AS I ANSWERED THE F/A'S, I TRIED TO ENGAGE OUR PERFORMANCE DATA COMPUTER IN A CRUISE MODE. APCHING FL220 IT WOULD NOT ENGAGE. ATC THEN CALLED TO QUERY OUR ALT. WE WERE AT FL224 AND STILL CLBING. OUR ALT SELECT WAS SHOWING FL230, EVEN THOUGH WE HAD SET IT FOR FL220. I AM SURE WE HAD SET FL220 IN THE ALT SELECT ORIGINALLY BECAUSE THE F/O AND I HAD CONFIRMED IT EARLIER. I BELIEVE THIS ALT INCURSION WAS THE RESULT OF AN UNSCHEDULED CHANGE IN THE ALT SELECT ON OUR MCP.

Data retrieved from NASA's ASRS site as of August 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.