PRESSURED BY A DELAYED DEP; FLT CREW OF CARJ TAKE OFF AT A TKOF GROSS WT IN EXCESS OF THAT RESTR BY MAX LNDG WT.

Narrative

THIS RPT CONCERNS A PART 121 FLT FROM CAE TO IAD. WE WERE LATE DEPARTING BECAUSE OF A PAX BOARDING PROB. WHEN THE RAMP INFORMED US THAT WE HAD MORE BAGS THAN EXPECTED; WE DETERMINED THAT WE WOULD NOT BE ABLE TO USE REDUCED THRUST FOR TKOF; BUT WE COULD STILL USE FULL PWR. WHAT WE FAILED TO LOOK AT WAS HOW OUR MAX TKOF WT WAS LIMITED BY ENRTE FUEL BURN. BECAUSE OF THIS; WE DEPARTED BELOW THE STRUCTURAL AND PERFORMANCE RESTR MAX TKOF WT; BUT ABOVE THE MAX TKOF WT RESTR BY PLANNED LNDG WT. THIS DISCREPANCY WAS DISCOVERED ENRTE WHEN WE NOTICED THE ESTIMATED FUEL ON BOARD AT LNDG WOULD PUT US ABOVE OUR MAX LNDG WT. WE ENTERED A HOLDING PATTERN UNTIL WE BURNED ENOUGH FUEL TO LAND UNDER THE MAX LNDG WT. WHEN LOOKING AT THE PAPERWORK; WE DEPARTED 300 LBS OVERWT. UPON FURTHER INSPECTION; WE DETERMINED THAT; IN HIS HASTE; THE FO ENTERED THE ADJUSTED WT UNIT FOR 25 PAX IN ZONE 2 INSTEAD OF THE 24 WE ACTUALLY HAD ON BOARD. THIS ERROR ACCOUNTED FOR 200 LBS OF THE 300 LBS WE WERE OVERWT. THE 100 LBS WE WERE ACTUALLY OVERWT BY WAS THE AMOUNT OF FUEL ABOVE THE MINIMUM THAT WAS IN OUR TANKS AT TKOF. THE #1 FACTOR INVOLVED WAS TIME. THE FLT WAS LATE; SO WE WERE DOING OUR JOBS QUICKER TO TRY AND REDUCE THE DELAY AS MUCH AS POSSIBLE. BECAUSE OF THIS HASTE TO DEPART; THE FO MADE THE MISTAKE. IN MY HASTE TO DEPART; I DID NOT ADEQUATELY CHK HIS WORK; AND THUS SIGNED OFF ON A FAULTY WT AND BAL FORM. AFTER THE FLT; I CONDUCTED AN AFTER ACTION REVIEW WITH MY FO TO DISCUSS WHAT WENT WRONG AND HOW WE COULD PREVENT IT FROM HAPPENING AGAIN. WE DETERMINED THAT OUR HASTE TO DEPART WAS THE ROOT CAUSE AND WE IMPLEMENTED SOME SPOT CHKS TO REDUCE THE CHANCES OF IT HAPPENING AGAIN. THE SPOT CHKS INCLUDED THINGS LIKE DOUBLECHKING THE NUMBERS WITH THE FMS AND INCREASED OVERSIGHT ON MY PART. WE ALSO DISCUSSED THE IMPORTANCE OF TAKING THE TIME TO DO A JOB RIGHT; ESPECIALLY WHEN IN A RUSH. SUPPLEMENTAL INFO FROM ACN 675281: WE DID NOT LAND OVERWT BECAUSE WE ENTERED A HOLDING PATTERN AND HAD TO DIVERT TO ORF.