Service difficulty report · Floorbeam · Boeing 7378H4

Difficulty date
December 11, 2023
Submitted
January 25, 2024
Operation
Air carrier
Aircraft
N8313F
Make and model
Boeing 7378H4
Aircraft serial
38810
Aircraft time
37,864 hours, 17,584 cycles
Part
Floorbeam
Part number
UNKNOWN
Condition
Corroded
Location
Zn 200 Fus Top
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

CORROSION ON BS 947.5 FLOOR BEAM LBL 52 WL 208<[01] EDITED CORRODED P/N;[02] UPDATED STEP 14;[03] PARTIAL STEP 14;[04] PARTIAL STEP 14;[05] PARTIAL STEP 16-17-18;[06] PARTIAL UPDATE STEP 15;[07] PARTIAL UPDATE STEP 19;[08] PARTIAL UPDATE STEP 20;[09] COMPLETED STEPS 14 & 22.;[10] PERFORMED REPAIR ON THE UPPER CHORD OF THE FLOOR BEAM AT B/S 947.5 FROM RBL 29 TO LBL 58.60 IAWSRM 53-70-51-2R-5 REPAIR 5;[11] UPDATE MEASUREMENTS PARAMETERS;[12] UPDATED MEASUREMENTS TABLE

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