Removed the nose skin and wingtip and set them aside. Updrilled the nose rib attachments to the main spar to final A5 rivet size. Deburred the nose ribs. Drilled holes in nose ribs for the folowing:
- Ribs #1 & #2: fuel supply line and fuel return line (with added rubber gommets) - Rib #3: Access hole for fuel supply connection to fuel tank and access hole for fuel return line to fuel tank.
All 7 nose ribs updrilled for riveting, deburred, sanded.
Nose ribs #1 - #3 with fuel supply and return lines drilled out (and grommeted where appropriate).