What was found
DURING 4Y/2Y INSPECTION, RIGHT I/B UPPER STAB SPAR FASTENER HOLES FOUND TO BE IRREGULARLY SHAPED. COMPLIED WITH EO AD991921-03 PROCEDURE, FINAL REAMING OF HOLES, STEP 2 E-(1)-(2) 246 IAW MESABA EO AD991921-03. AIRCRAFT RELEASE DATE 4/16/2004.