B737-800 captain reported burning more fuel than planned on an international over-water flight and s...

Narrative:

The flight was weight restricted. We sent the fuel via ACARS at the gate. Ramp ended up off loading cargo due to weight issues. We got the load closeout very quickly which is unusual for a weight restricted flight. We were super heavy on the takeoff roll. We were way too heavy to step climb as planned on our flight plan. Then enroute we were 1;400 lbs. Behind on the fuel burn. On weight restricted flights; we usually get minimum fuel so that we can accommodate all the passengers and bags. This flight was an international overwater flight. We don't have many airports to choose from if we have an issue on the flight and we have to land; and most of the airports are one runway operation so our fuel burn is critical. [This was a] possible load issue.

Original NASA ASRS Text

Title: B737-800 Captain reported burning more fuel than planned on an international over-water flight and suspected the aircraft was heavier than the paperwork showed.

Narrative: The flight was weight restricted. We sent the fuel via ACARS at the gate. Ramp ended up off loading cargo due to weight issues. We got the load closeout very quickly which is unusual for a weight restricted flight. We were super heavy on the takeoff roll. We were way too heavy to step climb as planned on our flight plan. Then enroute we were 1;400 lbs. behind on the fuel burn. On weight restricted flights; we usually get minimum fuel so that we can accommodate all the passengers and bags. This flight was an international overwater flight. We don't have many airports to choose from if we have an issue on the flight and we have to land; and most of the airports are one runway operation so our fuel burn is critical. [This was a] possible load issue.

Data retrieved from NASA's ASRS site 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.

Attributes
ACN	1603057
Time
Date	201812
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Aircraft 1
Make Model Name	B737-800
Operating Under FAR Part	Part 121
Flight Phase	Taxi
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Multiengine Flight Crew Instrument Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Deviation - Procedural Published Material / Policy Deviation - Procedural Weight And Balance Inflight Event / Encounter Fuel Issue

B737-800 captain reported burning more fuel than planned on an international over-water flight and suspected the aircraft was heavier than the paperwork showed.