Posted for "Bryan J. Burr" <bjburr@mwheli.com>:

 If you are holding pressure for 24 hours then you are good to go.  I had
 leaks and could actually hear the air escaping.  So it was easy to tell.
 After repairing the leaks and holding pressure for 8 hours we filled
 with fuel (2 gallons per wing) tipped them fore/aft and upside down,
 left to right, and drained to get rid of any debris.  After installing
 on the airplane we filled completely, mapped our fuel quantity
 indicators, and NO LEAKS.  After 145 hours of flying since April 2004
 and a few thousand gallons they are dry as a bone.
 
 Bryan Burr
 N132BB