What was found
STRINGER 31P TO FRAME X-18.250 ATTACH BOLT, NUT AND WASHER ARE CORRODED. REMOVED ATTACH BOLT, NUT AND WASHER IAW AMM 20-10-01-430-801. REMOVED AFT FITTING FOM IAW SRM 51-42-05-00-01, 51-42-05-02-01 AND 51-40-15-02-01. REMOVED STRINGER 31P BATHTUB FITTING FWD OF FRAME -18.250 FOM IAW Q400 SRM 51-42-05-02-01. INSTALLED FWD BATHTUB FITTING IAW SRM 51-42-05-02-01. MATCH DRILLED NEW FITTING AFT OF -18.250 IAW SRM 51-40-07-02-01. INSTALLED NEW AFT BATHTUB FITTING IAW SRM 51-42-05-02-01, 51-40-15-02-01 AND AMM 20-10-01-430-801. APPLIED ALODINE, PRIMER, TOP COAT, ALUMINIZED PRIMER AND CPC IAW SRM 51-21-10-02-01, 51-25-10-02-01, 51-25-05-02-01, 51-25-05-02-01, 51-25-15-02-01 AND 51-25-01-390-801.