VENT SYSTEM FLOW TEST
Install plug (3) in gravity fill port of fuel tank (17).
Open valve (4).
Test equipment must be watched
closely to prevent damage to aircraft if
vent system is blocked. Vent system
blockage will cause pressure to rise
quickly and damage will occur.
Slowly open valve (5) while watching gage (12).
If gage reads above 3 psi close valve and go
to step 17. If gage does not read above 3 psi,
go to step 19.