The flight crew of a 4 engine widebody transport carbo aircraft noticed during cruise that they had burned more fuel than computed for flight resulting in stopping en route for fuel. They were informed by dispatch that there was an additional 65000 pounds of cargo loaded onboard at departure that was not listed on their manifest causing a higher fuel burn than expected.

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Attributes
ACN	406861
Time
Date	199806
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : zan
State Reference	AK
Altitude	msl bound lower : 31000 msl bound upper : 31000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zan
Operator	common carrier : air carrier
Make Model Name	Widebody, Low Wing, 4 Turbojet Eng
Navigation In Use	Other
Flight Phase	cruise other other
Route In Use	enroute airway : zan
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : second officer
Qualification	pilot : flight engineer pilot : instrument pilot : atp
Experience	flight time last 90 days : 240 flight time total : 8500 flight time type : 1500
ASRS Report	406861
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	non adherence : far other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	other
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

Load data is reported to the pilots by station operations personnel via ACARS and/or paper weight tab. Station operations is the pilot's only means of determining how much cargo was loaded on an airplane. Approximately 1 hour into the flight, which departed anc at XA18 local time en route to lax, we reported a fuel overburn of approximately 5000 pounds to our dispatcher via ACARS. The dispatcher responded informing us that anc operations neglected to report 65000 pounds of cargo which was on-loaded in anc. The aircraft was not over its structural or runway performance weight, but our flight plan fuel burn was incorrect due to the heavier weight. The captain decided to stop in sea for fuel. A normal approach and landing were made. We were not fuel critical at any time. Fuel on aircraft was approximately 59000 pounds providing about 2 hours flying time.

Original NASA ASRS Text

Title: THE FLC OF A 4 ENG WDB CARBO ACFT NOTICED DURING CRUISE THAT THEY HAD BURNED MORE FUEL THAN COMPUTED FOR FLT RESULTING IN STOPPING ENRTE FOR FUEL. THEY WERE INFORMED BY DISPATCH THAT THERE WAS AN ADDITIONAL 65000 LBS OF CARGO LOADED ONBOARD AT DEP THAT WAS NOT LISTED ON THEIR MANIFEST CAUSING A HIGHER FUEL BURN THAN EXPECTED.

Narrative: LOAD DATA IS RPTED TO THE PLTS BY STATION OPS PERSONNEL VIA ACARS AND/OR PAPER WT TAB. STATION OPS IS THE PLT'S ONLY MEANS OF DETERMINING HOW MUCH CARGO WAS LOADED ON AN AIRPLANE. APPROX 1 HR INTO THE FLT, WHICH DEPARTED ANC AT XA18 LCL TIME ENRTE TO LAX, WE RPTED A FUEL OVERBURN OF APPROX 5000 LBS TO OUR DISPATCHER VIA ACARS. THE DISPATCHER RESPONDED INFORMING US THAT ANC OPS NEGLECTED TO RPT 65000 LBS OF CARGO WHICH WAS ON-LOADED IN ANC. THE ACFT WAS NOT OVER ITS STRUCTURAL OR RWY PERFORMANCE WT, BUT OUR FLT PLAN FUEL BURN WAS INCORRECT DUE TO THE HEAVIER WT. THE CAPT DECIDED TO STOP IN SEA FOR FUEL. A NORMAL APCH AND LNDG WERE MADE. WE WERE NOT FUEL CRITICAL AT ANY TIME. FUEL ON ACFT WAS APPROX 59000 LBS PROVIDING ABOUT 2 HRS FLYING TIME.

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.