Service difficulty report · Spar · Boeing 747412

Difficulty date
December 31, 2024
Submitted
February 6, 2025
Operation
Air carrier
Aircraft
N729CA
Make and model
Boeing 747412
Aircraft serial
25068
Aircraft time
97,345 hours, 16,757 cycles
Part
Spar
Condition
Corroded
Location
Zone 100
Part time
97,345 hours, 16,757 cycles
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 DAMAGE WAS FOUND ON WING CENTER SECTION REAR SPAR WEB P/N 111U1007-1 AFT SURFACE SAT JETTISON PUMP CUTOUT. DAMAGE WAS BLENDED OUT HOWEVER THE REMOVAL MATERIAL THICKNESS WAS MORE THEN 15%OF ORIGINAL