B737 crew overshoots assigned altitude.

Attributes
ACN	470010
Time
Date	200004
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : mmsd.airport
State Reference	FO
Altitude	msl bound lower : 2000 msl bound upper : 21000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : mmzt.artcc
Operator	common carrier : air carrier
Make Model Name	B737-300
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 210 flight time total : 19500 flight time type : 12000
ASRS Report	470010
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : instrument pilot : commercial
Events
Anomaly	altitude deviation : overshoot non adherence : clearance
Independent Detector	other controllera
Resolutory Action	none taken : detected after the fact
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

While climbing after departure to initial altitude of FL240, final altitude was changed to FL200, creating an altitude overshoot. Clearance was read back to ATC, but altitude selector not reset. First officer was flying and did not hear the new altitude so did no reset and overshot.

Original NASA ASRS Text

Title: B737 CREW OVERSHOOTS ASSIGNED ALT.

Narrative: WHILE CLBING AFTER DEP TO INITIAL ALT OF FL240, FINAL ALT WAS CHANGED TO FL200, CREATING AN ALT OVERSHOOT. CLRNC WAS READ BACK TO ATC, BUT ALT SELECTOR NOT RESET. FO WAS FLYING AND DID NOT HEAR THE NEW ALT SO DID NO RESET AND OVERSHOT.

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.