A321 crew overshoot assigned altitude after requesting to level off to check a door problem.

Attributes
ACN	525540
Time
Date	200109
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	navaid : dvc.vortac
State Reference	CO
Altitude	msl bound lower : 25000 msl bound upper : 25700
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	A321
Flight Phase	climbout : vacating altitude climbout : intermediate altitude ground : preflight
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 180 flight time total : 10000 flight time type : 1000
ASRS Report	525540
Events
Anomaly	altitude deviation : overshoot non adherence : clearance
Resolutory Action	controller : issued advisory flight crew : returned to assigned altitude
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

We were climbing through FL215 on our way up to FL270. Upon receiving a door slide disarmed warning, we requested clearance to stop our climb at FL250. ZLA approved our request so we proceeded to investigate the slide anomaly. We inadvertently passed through FL250 and stopped the climb at FL257 and advised ZLA that we were returning to FL250. He stated that we were cleared to FL250 and stated there was no problem.

Original NASA ASRS Text

Title: A321 CREW OVERSHOOT ASSIGNED ALT AFTER REQUESTING TO LEVEL OFF TO CHK A DOOR PROB.

Narrative: WE WERE CLBING THROUGH FL215 ON OUR WAY UP TO FL270. UPON RECEIVING A DOOR SLIDE DISARMED WARNING, WE REQUESTED CLRNC TO STOP OUR CLB AT FL250. ZLA APPROVED OUR REQUEST SO WE PROCEEDED TO INVESTIGATE THE SLIDE ANOMALY. WE INADVERTENTLY PASSED THROUGH FL250 AND STOPPED THE CLB AT FL257 AND ADVISED ZLA THAT WE WERE RETURNING TO FL250. HE STATED THAT WE WERE CLRED TO FL250 AND STATED THERE WAS NO PROB.

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.