Crew climbed above assigned altitude.

Attributes
ACN	428330
Time
Date	199902
Day	Sun
Local Time Of Day	0001 To 0600
Place
Locale Reference	atc facility : zob.artcc
State Reference	OH
Altitude	msl bound lower : 29000 msl bound upper : 29400
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	artcc : zob.artcc
Operator	common carrier : air carrier
Make Model Name	DC-9 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude cruise : level
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : multi engine pilot : atp
Experience	flight time last 90 days : 120 flight time total : 7200 flight time type : 1100
ASRS Report	428330
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	altitude deviation : overshoot non adherence : clearance
Independent Detector	other flight crewa
Resolutory Action	flight crew : returned to original clearance
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

We were level at FL280. Our filed altitude was FL330. Center cleared us to FL290 and said that would be our final altitude. Assuming our final altitude was FL330, we climbed through FL290 to FL294 then descended back to FL290. No conflicts associated.

Original NASA ASRS Text

Title: CREW CLBED ABOVE ASSIGNED ALT.

Narrative: WE WERE LEVEL AT FL280. OUR FILED ALT WAS FL330. CTR CLRED US TO FL290 AND SAID THAT WOULD BE OUR FINAL ALT. ASSUMING OUR FINAL ALT WAS FL330, WE CLBED THROUGH FL290 TO FL294 THEN DSNDED BACK TO FL290. NO CONFLICTS ASSOCIATED.

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.