What was found
INTERNAL SKIN IN FWD PIT CORRODED AT STA 579. REMOVED END CAPS FROM 25L TO 25R, FRAME AND SHEAR TIES AT STA 579 AND CORROSION IAW DC9 SRM 51-10-3. FABRICATED AND INSTALLED INTERNAL AND EXTERNAL DOUBLERS IAW DC9 SRM 53-04, FIG 43, AND RES 981100. REPLACED CRACKED LONGERON AND CAPS 25L, 26L AND 30L. REINSTALLED ALL REMOVED PARTS IAW DC9 SRM 51-30-2 AND 51-30-5.