Service difficulty report · Shear Web · Boeing 747451

Difficulty date
July 27, 2012
Submitted
July 27, 2012
Operation
Air carrier
Aircraft
N671US
Make and model
Boeing 747451
Aircraft serial
26477
Aircraft time
59,352 hours, 7,488 cycles
Part
Shear Web
Condition
Cracked
Location
Zone C
Stage of operation
IN
How discovered
9
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

DURING INSPECTION, FOUND MAIN DECK ZONE 'C' RIGHT TENSION TIES SLOPING SHEAR WEB SUPPORTING GUSSET CRACKED. MAINTENANCE REMOVED RIGHT TENSION TIES SLOPING SHEAR WEB SUPPORTING GUSSET AS PER SRM 51-40-02. FABRICATED NEW GUSSET MATERIAL USED 2024-0-0.050" AS PER DWG 65B09631 AND INSTALLED AT S 1120 RIGHT TENSION TIES SLOPING SHEAR WEB AREA AS PER SRM 51-40-02.