What was found
DURING ROUTINE C-CHECK INSP FOUND UPPER END APU AIR INTAKE DOOR SKIN CRACKED AT STA FS 1725. REMOVED CRACKED SKIN. PERFORMED NDT INSP. NO DISCREPANCIES NOTED. FABRICATED NEW SKIN, INTERNAL AND EXTERNAL DOUBLERS. CLEANED, TREATED PRIMED AREA AND REPAIR PARTS. INSTALLED REPAIR PARTS IAW FIG 201, REPAIR NR 5. MM 51-21-01-7, SRM 51-40-02, NDT PART E 51-00-19, 51-21-04-7, AND 51-21-10-7.