What was found
FWD CARGO COMPT, STA 500L, R/H LOWER BULKHEAD ATTACH ANGLE CORRODED, S 23R- S 25R. GROUNDED - YES. REMOVED CORROSION FROM FWD PIT LOWER R/H BULKHEAD ANGLE AT STA 500L IAW B737-900ER SRM 53-30-08-1A-1. MINIMUM ALLOWABLE REMAINING THICKNESS IS .056" IAW B737-900ER SRM 53-30-08-1A-1. REMAINING THICKNESS IS .048" AND IS FOUND TO BE OUT OF LIMITS IAW B737-900ER SRM 53-30-08-1A-1. REMOVED AND REPLACED IAW B737-900ER SRM 51-40-02 & SRM 51-40-05.