An medium large transport has an altitude deviation of 300 ft during leveloff out of cle.

Attributes
ACN	345190
Time
Date	199608
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : cle
State Reference	OH
Altitude	msl bound lower : 5000 msl bound upper : 5300
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : cle
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : flight engineer pilot : commercial pilot : atp pilot : cfi
Experience	flight time last 90 days : 250 flight time total : 6000 flight time type : 3700
ASRS Report	345190
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	altitude deviation : overshoot inflight encounter : weather non adherence : clearance
Independent Detector	other controllera other flight crewa
Resolutory Action	flight crew : returned to intended course or assigned course other
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	other

Narrative:

Flight XXX departing from cle to atl. Departure control told us to climb and maintain 5000 ft MSL. At 4000 ft MSL, I, nonflying first officer, called out 4000 ft for 5000 ft. We were working WX radar around local cumulonimbus. I looked up and saw 5200 ft. Then controller asked us to level at 5000 ft as the altitude alert (+300 ft) went off. Captain promptly descended to 5000 ft, without incident. Chain of events: this was our 5 day in a row on duty flying and fourth leg of this day. We were tired and the day was hot (90's) and made us even more tired. When we were approaching 5000 ft altitude clearance, I was not paying attention to altitude, but was focused on radar and our deviating around cumulonimbus. I should have made backup of altitude my priority until after proper leveloff. I feel that both myself and the captain are careful, diligent pilots. Fatigue led both of us to perform substandard.

Original NASA ASRS Text

Title: AN MLG HAS AN ALT DEV OF 300 FT DURING LEVELOFF OUT OF CLE.

Narrative: FLT XXX DEPARTING FROM CLE TO ATL. DEP CTL TOLD US TO CLB AND MAINTAIN 5000 FT MSL. AT 4000 FT MSL, I, NONFLYING FO, CALLED OUT 4000 FT FOR 5000 FT. WE WERE WORKING WX RADAR AROUND LCL CUMULONIMBUS. I LOOKED UP AND SAW 5200 FT. THEN CTLR ASKED US TO LEVEL AT 5000 FT AS THE ALT ALERT (+300 FT) WENT OFF. CAPT PROMPTLY DSNDED TO 5000 FT, WITHOUT INCIDENT. CHAIN OF EVENTS: THIS WAS OUR 5 DAY IN A ROW ON DUTY FLYING AND FOURTH LEG OF THIS DAY. WE WERE TIRED AND THE DAY WAS HOT (90'S) AND MADE US EVEN MORE TIRED. WHEN WE WERE APCHING 5000 FT ALT CLRNC, I WAS NOT PAYING ATTN TO ALT, BUT WAS FOCUSED ON RADAR AND OUR DEVIATING AROUND CUMULONIMBUS. I SHOULD HAVE MADE BACKUP OF ALT MY PRIORITY UNTIL AFTER PROPER LEVELOFF. I FEEL THAT BOTH MYSELF AND THE CAPT ARE CAREFUL, DILIGENT PLTS. FATIGUE LED BOTH OF US TO PERFORM SUBSTANDARD.

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.