Service difficulty report · Keelbeam · Boeing 747446

Difficulty date
May 16, 2017
Submitted
May 17, 2017
Operation
Air carrier
Aircraft
N464MC
Make and model
Boeing 747446
Aircraft serial
26341
Aircraft time
93,524 hours, 17,407 cycles
Part
Keelbeam
Condition
Corroded
Location
Bs 1460
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

FOUND CORROSION BETWEEN FASTENERS ON KEEL BEAM LOWER FLANGE. BS 1460, RBL 9. REMOVED FASTENERS AT LWR KEEL BEAM CHORD TO REMOVE CORROSION BETWEEN FASTENERS HOLES IAW SRM 53-40-12-1A-1, PARA 3, STEP B. FOUND WITHIN LIMITS IAW 53-40-12, AND SRM 51-40-02.