Flight crew of carj discover they took off overweight due to miscalculation.

Attributes
ACN	668720
Time
Date	200508
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : mem.airport
State Reference	TN
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zme.artcc
Operator	common carrier : air carrier
Make Model Name	Regional Jet 200 ER&LR
Operating Under FAR Part	Part 121
Flight Phase	cruise : level
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Experience	flight time last 90 days : 150 flight time total : 6500 flight time type : 5000
ASRS Report	668720
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Experience	flight time last 90 days : 90 flight time total : 3600 flight time type : 650
ASRS Report	668721
Events
Anomaly	non adherence : published procedure non adherence : far non adherence : company policies other anomaly other
Independent Detector	other flight crewa other flight crewb
Resolutory Action	none taken : detected after the fact
Supplementary
Problem Areas	Flight Crew Human Performance Aircraft Company
Primary Problem	Flight Crew Human Performance

Narrative:

While en route; the first officer was calculating our projected landing weight. He realized that we would be above our maximum landing weight. We went back through our preflight calculations and realized that we took off at 50667 pounds when our maximum allowable takeoff weight was 50150 pounds. Maximum landing weight was 47000 pounds. Our calculated fuel burn was 3150 pounds which limited us to a maximum allowable takeoff weight of 50150 pounds. Upon realizing our error; we requested a 360 degree turn at our cruising altitude to burn off the extra fuel. Although we caught our error en route; we should not have taken off above our maximum allowable takeoff weight. No actual aircraft limitations were exceeded. Both of us should have caught this error before takeoff. In the future; I will take the time to doublechk our performance calculations before departing the gate.

Original NASA ASRS Text

Title: FLT CREW OF CARJ DISCOVER THEY TOOK OFF OVERWT DUE TO MISCALCULATION.

Narrative: WHILE ENRTE; THE FO WAS CALCULATING OUR PROJECTED LNDG WT. HE REALIZED THAT WE WOULD BE ABOVE OUR MAX LNDG WT. WE WENT BACK THROUGH OUR PREFLT CALCULATIONS AND REALIZED THAT WE TOOK OFF AT 50667 LBS WHEN OUR MAX ALLOWABLE TKOF WT WAS 50150 LBS. MAX LNDG WT WAS 47000 LBS. OUR CALCULATED FUEL BURN WAS 3150 LBS WHICH LIMITED US TO A MAX ALLOWABLE TKOF WT OF 50150 LBS. UPON REALIZING OUR ERROR; WE REQUESTED A 360 DEG TURN AT OUR CRUISING ALT TO BURN OFF THE EXTRA FUEL. ALTHOUGH WE CAUGHT OUR ERROR ENRTE; WE SHOULD NOT HAVE TAKEN OFF ABOVE OUR MAX ALLOWABLE TKOF WT. NO ACTUAL ACFT LIMITATIONS WERE EXCEEDED. BOTH OF US SHOULD HAVE CAUGHT THIS ERROR BEFORE TKOF. IN THE FUTURE; I WILL TAKE THE TIME TO DOUBLECHK OUR PERFORMANCE CALCULATIONS BEFORE DEPARTING THE GATE.

Data retrieved from NASA's ASRS site as of January 2009 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.