What was found
CABIN FLOOR PNL NR 37 HAS SURFACE CORROSION AT OTBD FASTENER HOLES. REMOVED CORROSION REF SRM 51-10-3. ORIG MATERIAL IS .020 REF SRM 53-23-0. MAX ALLOWABLE MATERIAL LOSS IS .004 MATERIAL LOSS .007, OUT OF LIMITS, REF SRM 53-01, PG8 FIG 1. REMOVED CHANNELS FROM WEB. FABRICATED WEB IAW SRM 53-23-0 PG7 FIG 4. TREATED IAW SRM 51-10-3, PG 40, PARA 21 & PRIMED SRM 51-10-3, PG31, PARA 14. INST HAT CHANNELS REF 51-30-2. INSTALLED IAW AMM 53-20-01-201-925A-A.