So, I went at the fittings with soapy water and sure enough... So, I'll re-flare the tubes (after cutting off the current flare of course) and the question is do I use thread locker or just teflon tape which online discussions seem to indicate is OK in air lines.
NEXT TASKS:
- Fitting and final sealing of left wing fuel tank. Tank off and test for seal.
- Mark bolts.
- Fuel tank on. Just bolted at this point.
- Top skins riveted on (STRINGERS!). Top skins of left wing need priming. Fill rivets with Bondo.
- Leading edge riveted on (STRINGER!). Fill rivets with Bondo.
- Rivet fuel tank on. Fill rivets with Bondo.
- Wing tip assembly and light installation.
- Finish sanding of left wing bottom rivet heads.
- Finish right wing (3,4,5,6,7).
- Finally finish one of the composite tips of the elevator.
- Fill rivets of elevator with Bondo.
- START ON FUSELAGE!