What was found
CORROSION FOUND ON THE R4 DOOR CUTOUT FWD INTERCOSTAL OTBD ANGLE BETWEEN BS 1630 AND 1640, JUST BELOW R-4 DOOR POWER ASSIST ACTUATOR. FOUND OUT OF LIMITS IAW SRM 53-60-15, FIG 101, DETAIL 6. REMOVED AND REPLACED THE INTERCOSTAL ANGLE IAW SRM 5 1-40-02, PG 1-10, AND DWG 146N8734.