Narrative:

Overweight taxi, fumes in airplane, overweight landing. Prior to before starting engines checklist, first officer sent ACARS message with fuel on board of 23000 pounds. Release fuel was 22200 pounds. The crew chief told us we were under on cargo weight. Gate agent called load control to get extra passenger on board, increasing passenger count to 84 from our weight restr limit of 83. Realized we were overweight for taxi and returned to gate. Accomplished overweight taxi inspection. During takeoff roll, we were close to an S80 and believed we were smelling his exhaust. Fumes increased during climb out and we got smoke aft right toiler alert. Completed the abnormal checklist and the abnormal cleared on the rmfdu, but fumes remained strong. Declared emergency and landed overweight at ord at 95200 pounds versus maximum 88000 pounds. Taxied to gate with arff escort, since fumes had begun to dissipate. Arff boarded the airplane with infrared camera, but could not locate heat source. Entered both problems in logbook and changed to another aircraft. Even though we had sent an ACARS fuel report and had been assured that we could take the extra passenger at our current weight, I feel I could have prevented the overweight taxi by being more inquisitive and waiting until receiving the closeout before pushing back. Supplemental information from acn 563244: in the process of pushing, we noticed that we were overweight. We had started #1 and were in the process of starting #2, but left the starter on more than the limits. Lesson learned: any time in the middle of a checklist, don't get distraction -- finish the checklist.

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Original NASA ASRS Text

Title: F100 CREW TAXIED OVERWT AND FILLED THE CABIN WITH JET EXHAUST FUMES FROM FOLLOWING AN MD80 ACFT TOO CLOSE.

Narrative: OVERWT TAXI, FUMES IN AIRPLANE, OVERWT LNDG. PRIOR TO BEFORE STARTING ENGS CHKLIST, FO SENT ACARS MESSAGE WITH FUEL ON BOARD OF 23000 LBS. RELEASE FUEL WAS 22200 LBS. THE CREW CHIEF TOLD US WE WERE UNDER ON CARGO WT. GATE AGENT CALLED LOAD CTL TO GET EXTRA PAX ON BOARD, INCREASING PAX COUNT TO 84 FROM OUR WT RESTR LIMIT OF 83. REALIZED WE WERE OVERWT FOR TAXI AND RETURNED TO GATE. ACCOMPLISHED OVERWT TAXI INSPECTION. DURING TKOF ROLL, WE WERE CLOSE TO AN S80 AND BELIEVED WE WERE SMELLING HIS EXHAUST. FUMES INCREASED DURING CLBOUT AND WE GOT SMOKE AFT R TOILER ALERT. COMPLETED THE ABNORMAL CHKLIST AND THE ABNORMAL CLRED ON THE RMFDU, BUT FUMES REMAINED STRONG. DECLARED EMER AND LANDED OVERWT AT ORD AT 95200 LBS VERSUS MAX 88000 LBS. TAXIED TO GATE WITH ARFF ESCORT, SINCE FUMES HAD BEGUN TO DISSIPATE. ARFF BOARDED THE AIRPLANE WITH INFRARED CAMERA, BUT COULD NOT LOCATE HEAT SOURCE. ENTERED BOTH PROBS IN LOGBOOK AND CHANGED TO ANOTHER ACFT. EVEN THOUGH WE HAD SENT AN ACARS FUEL RPT AND HAD BEEN ASSURED THAT WE COULD TAKE THE EXTRA PAX AT OUR CURRENT WT, I FEEL I COULD HAVE PREVENTED THE OVERWT TAXI BY BEING MORE INQUISITIVE AND WAITING UNTIL RECEIVING THE CLOSEOUT BEFORE PUSHING BACK. SUPPLEMENTAL INFO FROM ACN 563244: IN THE PROCESS OF PUSHING, WE NOTICED THAT WE WERE OVERWT. WE HAD STARTED #1 AND WERE IN THE PROCESS OF STARTING #2, BUT LEFT THE STARTER ON MORE THAN THE LIMITS. LESSON LEARNED: ANY TIME IN THE MIDDLE OF A CHKLIST, DON'T GET DISTR -- FINISH THE CHKLIST.

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.