Service difficulty report · Skin · Boeing 747422

Difficulty date
March 1, 2025
Submitted
March 3, 2025
Operation
Air carrier
Aircraft
N480MC
Make and model
Boeing 747422
Aircraft serial
28812
Aircraft time
81,302 hours, 9,722 cycles
Part
Skin
Condition
Corroded
Location
Zone 400
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

CORROSION ON #4 ENG LH CORE COWL SKIN BETWEEN NSTA 222 AND NSTA 230.(<P>1. REPAIR THE DAMAGE AREA IAW EI #T2025A54M-196 REV 0 AND REF DWG #314T4210 SH 7 REV-C, 344T4210 SH 8 REV D AND 314T4210 SH 5 REV B. 2. JOB COMPLETED AND CONDITION CHECK NORMAL.</P>)