What was found
NINE RIVETS ON STRINGER 16R SHOW SIGNS OF STRESS CRACKS EMANATING FROM THE FASTENER HOLES. REMOVED RIVETS, OVERSIZED HOLES BY 1/16, HFEC VERIFIED FASTENER HOLES CRACK FREE. FABRICATED FILLER AND DOUBLER. ALODINED AND PRIMED ALL BARE SURFACES. INSTALLED REPAIR PARTS PER SRM 53-30-3, FIGURE 17. REPAIR COMPLETED IAW SRM AND ECO 3340. AIRCRAFT RETURNED TO SERVICE. (M)