What was found
A/C EQUIP BAY, FAIRING SUPPORT INTERCOSTAL HAS CORROSION, STA 780, 3 INCHES, BL 0, JUST BELOW DELTA BEAM (STIFFENER). REMOVED CORRODED STIFFENER AND STRAP AT STA 780 + 3". REMOVED CORROSION AND MATERIAL WAS OUT OF LIMITS, BEYOND 10 PERCENT ALLOWABLE DAMAGE. FABRICATED NEW STRAP (PN 65-59318) AND STIFFENER (65-59318-21). STIFFENER WAS HEAT TREATED TO T-6 CONDITION ON NR N00507. TREATED AND PRIMED AND INSTALLED NEW STRAP AND STIFFENER. REF BOEING DWG 65-59318/SRM 51-30-02 PG 2 AND 13 SRM 53-10-1 PG 2 SRM 51-10-1 PG 12. THIS IS CLASSIFIED AS A MINOR REPAIR.