Service difficulty report · Skin · Boeing 747409

Difficulty date
November 20, 2025
Submitted
November 21, 2025
Operation
Air carrier
Aircraft
N249BA
Make and model
Boeing 747409
Aircraft serial
24309
Aircraft time
88,550 hours, 16,833 cycles
Part
Skin
Condition
Corroded
Location
Zone 500
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 LT WING UPPER SKIN LOWER SURFACE AT WS 1538. REMOVED THE AFFECTED FASTENER IAW SRM 51-40-02-0G-0 REV 62. BLENDED OUT THE DAMAGED AREA IAW SRM 51-10-02-0G-0 REV 62. PERFORMED NDT INSPECTION, REFER TO DATA SHEET 11633434-1 & DATA SHEET 11633434-2. ACCOMPLISHED EI T2025A57M-2454 REV 1. CHECKED NORMAL.