Back to home pageFuel Tenk Vents

Home > Tech Photos > Walkaround > Fuel Tank Vents

Contents

Illustrated technical information covering Vol 2 Over 800 multi-choice systems questions Study notes and technical information Close up photos of internal and external components A compilation of links to major 737 news stories with a downloadable archive Illustrated history and description of all variants of 737 Detailed tech specs of every series of 737 Databases and reports of all the major 737 accidents & incidents General flightdeck views of each generation of 737's Description & news reports of Advanced Blended Winglets Press reports of orders and deliveries Articles from the press and official sources following the troubled history of the rudder PCU Details about 737 production methods A compilation of links to other sites with useful 737 content Get the book of the website A quick concise overview of the pages on this site

See more details about the book

All of the information, photographs & schematics from this website and much more is now available in a 370 page printed book or EPUB available here.

*** Updated 24 Feb 2013 ***

The vents (NACA ducts), located near each wing tip, provide a small positive head of pressure on the fuel in all three tanks. This prevents a vacuum forming as fuel is used, assists the fuel pumps and reduces evaporation. NB if you overfill the fuel tanks, then this is where the ensuing fuel spillage will come from!

This photo of a 737-500 shortly after take-off shows a residue of fuel spilling from the surge tank vent. Perhaps they overfilled the number 1 wing tank?

This vent is forward of the starboard wing leading edge and is the vent for the auxiliary fuel tank, if fitted.

This site has had visitors to date.