Service difficulty report · Support Beam · Boeing 747412

Difficulty date
September 23, 2024
Submitted
September 24, 2024
Operation
Air carrier
Aircraft
N471MC
Make and model
Boeing 747412
Aircraft serial
26557
Aircraft time
92,959 hours, 15,218 cycles
Part
Support Beam
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 DAMAGES ON THE UPPER CHORD OF LH WING FIXED TRAILING EDGE SUPPORT BEAM AT WBL 304.372.(<P>1. REMOVED THE AFFECTED FASTENERS IAW SRM 51-40-02-0G-0 REV=60. 2. BLEND OUT THE DAMAGE AREA IAW SRM 51-10-02-0G-0 REV=60. 3. PFM NDT INSP REFER TO JOB CARD ATTACHING SHEET #0458452 AND DATA SHEET 10043937-1. 4. ACCOMPLISHED EI T2024A57M-2145 REV=1. 5. JOB COMPLETED AND CONDITION CHECK NORMAL.</P>)