Service difficulty report · Floorbeam · Boeing 737401

Difficulty date
July 30, 2011
Submitted
September 7, 2011
Operation
Air carrier
Aircraft
N425US
Make and model
Boeing 737401
Aircraft serial
23992
Aircraft time
60,222 hours, 40,296 cycles
Part
Floorbeam
Part number
6545833212
Condition
Corroded
Location
Fuselage
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

Q5 CHECK - LEVEL 2 INTERGRANULAR & EXFOLIATION CORROSION IN MULTIPLE AREAS OF FLOORBEAM UPPER CHORD AT BS 270, WL 208 BETWEEN LBL 18.750 TO RBL 18.50. REPAIRED FLOORBEAM UPPER CHORD AT BS 270, WL 208 BETWEEN LBL 18.750 TO RBL 18.50 IAW EA 103283.