SDR 9WGA2025021234404

Service difficulty report · Case · Boeing 747446

Difficulty date: February 8, 2025
Submitted: February 12, 2025
Operation: Air carrier
Aircraft: N344KD
Make and model: Boeing 747446
Aircraft serial: 26344
Aircraft time: 95,559 hours, 18,250 cycles
Engine: Ge CF680C2B1F
System (JASC): 7220 · Turbine Engine Air Inlet Section
Part: Case
Condition: Corroded
Location: Nr 3 Fan Case
Stage of operation: IN
How discovered: V
Nature of condition: O
Precautionary procedure: K

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

ENGINE #3 FAN CASE FOUND SLIGHTLY CORROSION BETWEEN 04:00TO 06:00 O'CLOCK. REMOVED CORRSOION AT ENGINE #3 FAN CASE BTW 0400 TO 0600 O'CLOCK, MATERIAL REMOVED 0.003, IAW CF6-30C2 W/M GEK 924 51 REV. 99, 12/01/2024 CFM 72-22-01. ALODINED AND PRIMED AREA IAW B747-400, SRM 51-20-01 AND AMM 51-24-21-370-804. AIRCRAFT APPROVED FOR RETURN TO SERVICE.