Brief Description: Drilled mounting holes in added ribs
The mandated LAA mod adds two ribs in the aileron to hold the balance weight arm.
1. Drilled holes in addedaileron ribs to acommodate balance weight. 2. Fit outboard rib in aileron. 3. Marked rivet line and pitch for rib. 4. Drilled pilot holes in aileron skin for outboard rib with #40 bit. 5. Positioned center of rib under pilot holes, and backdrilled with #20 bit. 6. Removed rib, and positioned balance arm on ribs. 7. Back drilled and clecoed balance arm to ribs with $40 bit. 8. Opened mounting holes for balance arm to 3/16" on arm and ribs. 9. Installed 3/16" anchor nuts on inboard rib with #3 Avex rivets.
