What was found
PDX - C4 - THE ANGLE ATTACHED TO FRAME X6.00 AT STR 25S/L IS CORRODED (BELOW DOOR SILL). DRILLED OUT RIVETS SECURING FWD SCUPPER AND REMOVED SCUPPER. DRILLED OUT RIVETS SECURING ANGLE TO AIRFRAME AND REMOVED ANGLE REF SRM 53-20-23 FIG 1, SHEET 3, ITEM 34. FABRICATED NEW ATTACH ANGLE, ALODINED, PRIMED, PAINTED AND INSTALLED WITH RIVETS PER SRM 51-42-05. INSTALLED REMAINING LOCK FASTENER, REF Q-400 SRM 51-40-15.