Cargo weighed incorrectly with subsequent overweight takeoff.

Attributes
ACN	300120
Time
Date	199503
Day	Mon
Local Time Of Day	0001 To 0600
Place
Locale Reference	airport : sdf
State Reference	KY
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B747-C/F
Operating Under FAR Part	Part 121
Flight Phase	climbout : takeoff ground : preflight
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : cfi pilot : atp pilot : flight engineer
Experience	flight time last 90 days : 80 flight time total : 8000 flight time type : 1900
ASRS Report	300120
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	non adherence : far non adherence : published procedure other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : detected after the fact
Consequence	Other
Supplementary
Air Traffic Incident	other

Narrative:

This is an incident about an aircraft that was actually loaded considerably heavier than the flight plan or weight and balance form indicated. The center of gravity was considerably farther forward than indicated (at the edge of the chart envelope). 33 of the 38 pallets/containers were heavier than the forms indicated. This was discovered after an abnormal takeoff and after the crew requested the cargo be reweighed after landing. It was found the aircraft actually weighed 660100 pounds instead of what we thought was 608100 pounds (60000 pounds heavier). The center of gravity was 11 percent instead of 22 percent. We rotated at 143 IAS instead of 153 IAS.

Original NASA ASRS Text

Title: CARGO WEIGHED INCORRECTLY WITH SUBSEQUENT OVERWT TKOF.

Narrative: THIS IS AN INCIDENT ABOUT AN ACFT THAT WAS ACTUALLY LOADED CONSIDERABLY HEAVIER THAN THE FLT PLAN OR WT AND BAL FORM INDICATED. THE CTR OF GRAVITY WAS CONSIDERABLY FARTHER FORWARD THAN INDICATED (AT THE EDGE OF THE CHART ENVELOPE). 33 OF THE 38 PALLETS/CONTAINERS WERE HEAVIER THAN THE FORMS INDICATED. THIS WAS DISCOVERED AFTER AN ABNORMAL TKOF AND AFTER THE CREW REQUESTED THE CARGO BE REWEIGHED AFTER LNDG. IT WAS FOUND THE ACFT ACTUALLY WEIGHED 660100 LBS INSTEAD OF WHAT WE THOUGHT WAS 608100 LBS (60000 LBS HEAVIER). THE CTR OF GRAVITY WAS 11 PERCENT INSTEAD OF 22 PERCENT. WE ROTATED AT 143 IAS INSTEAD OF 153 IAS.

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.