B777 flight crew has wrong weight and balance numbers for takeoff.

Attributes
ACN	727614
Time
Date	200702
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : sfo.airport
State Reference	CA
Altitude	agl single value : 0
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B777-200
Operating Under FAR Part	Part 121
Flight Phase	climbout : takeoff
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : relief pilot
Experience	flight time last 90 days : 80 flight time total : 5000 flight time type : 700
ASRS Report	727614
Person 2
Affiliation	company : air carrier
Function	flight crew : relief pilot
Experience	flight time last 90 days : 230 flight time total : 16300 flight time type : 400
ASRS Report	727609
Events
Anomaly	non adherence : published procedure non adherence : company policies non adherence : far
Independent Detector	other flight crewa other other : 2
Resolutory Action	none taken : detected after the fact
Supplementary
Problem Areas	Company
Primary Problem	Company

Narrative:

Final weights were received onboard aircraft. All normal sops were accomplished. Takeoff was flaps 15 runway 28R sfo. At 5 minutes after takeoff a second set of final weights arrived. The second set said aircraft weighed approximately 18000 pounds more than previous final weights. This resulted in using takeoff speeds for an aircraft which actually weighed 18000 pounds more. Unsafe operation to send wrong weights to aircraft. 1ST final weights were ZFW 394863; tog 592563; mac 27.1. 2ND set of final weights were ZFW 417471; tog 610171; mac 30.0. All sops were followed by experienced aircrew. Concern is that this failure could occur again and aircrew would not know they are using inaccurate weight information.

Original NASA ASRS Text

Title: B777 FLT CREW HAS WRONG WT AND BAL NUMBERS FOR TKOF.

Narrative: FINAL WTS WERE RECEIVED ONBOARD AIRCRAFT. ALL NORMAL SOPS WERE ACCOMPLISHED. TAKEOFF WAS FLAPS 15 RWY 28R SFO. AT 5 MINUTES AFTER TAKEOFF A SECOND SET OF FINAL WEIGHTS ARRIVED. THE SECOND SET SAID AIRCRAFT WEIGHED APPROX 18000 LBS MORE THAN PREVIOUS FINAL WEIGHTS. THIS RESULTED IN USING TAKEOFF SPEEDS FOR AN AIRCRAFT WHICH ACTUALLY WEIGHED 18000 LBS MORE. UNSAFE OPERATION TO SEND WRONG WEIGHTS TO AIRCRAFT. 1ST FINAL WTS WERE ZFW 394863; TOG 592563; MAC 27.1. 2ND SET OF FINAL WEIGHTS WERE ZFW 417471; TOG 610171; MAC 30.0. ALL SOPS WERE FOLLOWED BY EXPERIENCED AIRCREW. CONCERN IS THAT THIS FAILURE COULD OCCUR AGAIN AND AIRCREW WOULD NOT KNOW THEY ARE USING INACCURATE WEIGHT INFORMATION.

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.