Altitude deviation as a departure B737 PIC overshoots his assigned altitude after not insuring that the autoplt was engaged near mdw, il.

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Attributes
ACN	521330
Time
Date	200108
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : mdw.airport
State Reference	IL
Altitude	msl bound lower : 3000 msl bound upper : 3350
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : tup.tower
Operator	common carrier : air carrier
Make Model Name	B737 Undifferentiated or Other Model
Flight Phase	climbout : intermediate altitude
Route In Use	departure : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 110 flight time total : 23000 flight time type : 110
ASRS Report	521330
Events
Anomaly	aircraft equipment problem : less severe altitude deviation : excursion from assigned altitude non adherence : clearance non adherence : company policies non adherence : published procedure
Resolutory Action	controller : issued advisory flight crew : returned to assigned altitude flight crew : became reoriented
Supplementary
Problem Areas	Aircraft Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

I engaged the autoplt approaching our assigned altitude. The airplane continued climbing about 350 ft above assigned altitude. I physically flew the airplane back to altitude. ATC called to 'check your altitude.' I should have checked the mode annunciation panel to verify autoplt engagement.

Original NASA ASRS Text

Title: ALTDEV AS A DEP B737 PIC OVERSHOOTS HIS ASSIGNED ALT AFTER NOT INSURING THAT THE AUTOPLT WAS ENGAGED NEAR MDW, IL.

Narrative: I ENGAGED THE AUTOPLT APCHING OUR ASSIGNED ALT. THE AIRPLANE CONTINUED CLBING ABOUT 350 FT ABOVE ASSIGNED ALT. I PHYSICALLY FLEW THE AIRPLANE BACK TO ALT. ATC CALLED TO 'CHK YOUR ALT.' I SHOULD HAVE CHKED THE MODE ANNUNCIATION PANEL TO VERIFY AUTOPLT ENGAGEMENT.

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.