Altitude deviation altitude overshot.

Attributes
ACN	295512
Time
Date	199502
Day	Sun
Place
Locale Reference	airport : ord
State Reference	IL
Altitude	msl bound lower : 29000 msl bound upper : 29300
Aircraft 1
Controlling Facilities	artcc : zau tower : stl
Operator	common carrier : air carrier
Make Model Name	MD-80 Super 80
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
ASRS Report	295512
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 non adherence : far
Independent Detector	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:

We were cleared from 11000 ft to FL290 autoplt in performance. Pms did not switch to climb so I selected IAS to get the climb started. Through FL280 the altitude was set FL290 and armed. At 29300 ft the alert sounded and we returned to FL290. It appears the pms and possibly the autoflt system did not get the new selected altitude of FL290 though it was annunciated properly on the fdms.

Original NASA ASRS Text

Title: ALTDEV ALT OVERSHOT.

Narrative: WE WERE CLRED FROM 11000 FT TO FL290 AUTOPLT IN PERFORMANCE. PMS DID NOT SWITCH TO CLB SO I SELECTED IAS TO GET THE CLB STARTED. THROUGH FL280 THE ALT WAS SET FL290 AND ARMED. AT 29300 FT THE ALERT SOUNDED AND WE RETURNED TO FL290. IT APPEARS THE PMS AND POSSIBLY THE AUTOFLT SYS DID NOT GET THE NEW SELECTED ALT OF FL290 THOUGH IT WAS ANNUNCIATED PROPERLY ON THE FDMS.

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.