As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENGINE #4 FAN CASE FOUND SLIGHTLY CORROSION AT 04:00 TO 06:00 O'CLOCK UNDER OGV #40 TO #44. REMOVED LIGHT CORROSION AT ENG #4 FAN CASE AT 04:00 06:00 O'CLOCK MAT. REMOVED 0.002, FOUND WITHIN LIMITS IAW B747-400. CFA-80C2 E/M GEK 92451 REV. 99 12/01/2024, ESM 72-22-01. ALODINED AND PRIMED AREA IAW B747-400 SRM 51-20-01 AND AMM 51-24-21-370-804.