Narrative:

Misread takeoff performance settings. We were planned for a maximum improved takeoff with APU for bleeds. The load dropped off significantly and we saw that the v-spds were a lot lower, so we requested another tps, which we received. While taxiing to runway 35, the first officer reviewed the new tps and said (as part of his briefing) 'bleeds on.' we took off maximum power, 15 degrees flaps, and bleeds on. En route, I was reviewing the tps and discovered that the bleed field said 'APU' just like to original tps. I thus discovered that we had taken off overweight for the bleed confign that we used. The 2 causal items that I can identify were the fact that I did not review the new tps myself, relying on the first officer's interpretation and the fact that ACARS generated tps's are in a slightly different format. The first officer said he had read the wrong line.

Google
 

Original NASA ASRS Text

Title: B757-200 CREW HAD AN OVERWT TKOF AT SEQU.

Narrative: MISREAD TKOF PERFORMANCE SETTINGS. WE WERE PLANNED FOR A MAX IMPROVED TKOF WITH APU FOR BLEEDS. THE LOAD DROPPED OFF SIGNIFICANTLY AND WE SAW THAT THE V-SPDS WERE A LOT LOWER, SO WE REQUESTED ANOTHER TPS, WHICH WE RECEIVED. WHILE TAXIING TO RWY 35, THE FO REVIEWED THE NEW TPS AND SAID (AS PART OF HIS BRIEFING) 'BLEEDS ON.' WE TOOK OFF MAX PWR, 15 DEGS FLAPS, AND BLEEDS ON. ENRTE, I WAS REVIEWING THE TPS AND DISCOVERED THAT THE BLEED FIELD SAID 'APU' JUST LIKE TO ORIGINAL TPS. I THUS DISCOVERED THAT WE HAD TAKEN OFF OVERWT FOR THE BLEED CONFIGN THAT WE USED. THE 2 CAUSAL ITEMS THAT I CAN IDENT WERE THE FACT THAT I DID NOT REVIEW THE NEW TPS MYSELF, RELYING ON THE FO'S INTERP AND THE FACT THAT ACARS GENERATED TPS'S ARE IN A SLIGHTLY DIFFERENT FORMAT. THE FO SAID HE HAD READ THE WRONG LINE.

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.