Drill cover support ribs to front 904 bulkhead.
Drill web reinforcement angles to bulkhead.
Drill and countersink holes for all cover support rib nutplates.
Drill snap bushing holes to size.
Clean and prime cover support ribs and web reinforcement angles.
Countersink fwd bulkhead for flush rib rivets.
Alodine cuts in bulkheads.
Prime and enamel spacers.
Rivet nutplates to cover support ribs and web reinforcement angles.
Rivet cover support ribs and web reinforcement angles top bulkheads.
Install snap bushings.
Cut plywood to size for spacer blocks and glue together.
