B737-800 crew took off above the maximum takeoff weight for the runway at lga.

Attributes
ACN	517443
Time
Date	200107
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : lga.airport
State Reference	NY
Altitude	agl single value : 0
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B737-800
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	ground : takeoff roll
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 100 flight time total : 10800 flight time type : 350
ASRS Report	517443
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	inflight encounter : weather inflight encounter other non adherence : published procedure non adherence : company policies non adherence : far other anomaly other
Independent Detector	other flight crewa other flight crewb
Resolutory Action	none taken : detected after the fact
Supplementary
Problem Areas	Weather Company Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

Aircraft takeoff weight was 143161 pounds. Computer generated weight and balance data showed, for takeoff on runway 13, climb limit weight was 177803 pounds and runway allowable takeoff weight was 158674 pounds, utilizing full takeoff power. Winds were reported 320 degrees at 10 KTS. Ground control asked if we could accept runway 13 for takeoff. We did accept runway 13 for takeoff, but failed to properly apply performance corrections for the tailwind condition (-2900 pounds per KT from weight). I thought the data would allow a 10 KT tailwind, but failed to notice that operations personnel had input incorrect wind data into the takeoff data. We took off successfully, but upon closer review after takeoff, I found that we had exceeded the weight for runway 13 in these conditions. The wind data input from operations was grossly in error, showing a headwind for takeoff, but I should have studied the data more closely so that I could have applied the proper performance correction and prevented this occurrence.

Original NASA ASRS Text

Title: B737-800 CREW TOOK OFF ABOVE THE MAX TKOF WT FOR THE RWY AT LGA.

Narrative: ACFT TKOF WT WAS 143161 LBS. COMPUTER GENERATED WT AND BAL DATA SHOWED, FOR TKOF ON RWY 13, CLB LIMIT WT WAS 177803 LBS AND RWY ALLOWABLE TKOF WT WAS 158674 LBS, UTILIZING FULL TKOF PWR. WINDS WERE RPTED 320 DEGS AT 10 KTS. GND CTL ASKED IF WE COULD ACCEPT RWY 13 FOR TKOF. WE DID ACCEPT RWY 13 FOR TKOF, BUT FAILED TO PROPERLY APPLY PERFORMANCE CORRECTIONS FOR THE TAILWIND CONDITION (-2900 LBS PER KT FROM WT). I THOUGHT THE DATA WOULD ALLOW A 10 KT TAILWIND, BUT FAILED TO NOTICE THAT OPS PERSONNEL HAD INPUT INCORRECT WIND DATA INTO THE TKOF DATA. WE TOOK OFF SUCCESSFULLY, BUT UPON CLOSER REVIEW AFTER TKOF, I FOUND THAT WE HAD EXCEEDED THE WT FOR RWY 13 IN THESE CONDITIONS. THE WIND DATA INPUT FROM OPS WAS GROSSLY IN ERROR, SHOWING A HEADWIND FOR TKOF, BUT I SHOULD HAVE STUDIED THE DATA MORE CLOSELY SO THAT I COULD HAVE APPLIED THE PROPER PERFORMANCE CORRECTION AND PREVENTED THIS OCCURRENCE.

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.