Service difficulty report · Floorbeam · Boeing 7378H4

Difficulty date
May 22, 2023
Submitted
June 16, 2023
Operation
Air carrier
Aircraft
N8535S
Make and model
Boeing 7378H4
Aircraft serial
63596
Aircraft time
19,603 hours, 9,695 cycles
Part
Floorbeam
Part number
UNKNOWN
Condition
Corroded
Location
Zn 100 Fus Lower
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 947 FLOORBEAM AT RBL 49-50; RBL 24; WL 208.<[01] EVALUATED CORROSION ON BS947 FLOORBEAM AT RBL 49-50 2'X1'ORIGINAL MATERIAL THICKNESS .180 REMAINING MATERIAL THICKNESS .090; RBL 24 1.5'X1.5' REMAINING MATERIAL THICKNESS .120; WL 208 ALL I.A.W SRM 53-70-51-1A-1 ALLOWABLE DAMAGE 1 PAR 4.H(2)(B) FIGURE104/ALLOWABLE DAMAGE 1 DETAIL C.E CORROSION FOUND TO BE OUT LIMITS DISCREPANCY TO BE REPAIRED ON COSTUMER CARD TTG8Q00L6RSM.;[02] COMPLETED TASK;[03] TOOL USED ON CORRECTIVE ACTION 1<BR>TOOLS USED ON CORRECTIVE ACTION 2<BR>ATS1225<BR>S/N UNKNOWN<BR>DUE 08/2023<BR>ATS2738<BR>S/N A22004095<BR>DUE 04/2024;[04] VERIFIED CORRECTION ACTION ITEMS 1;2 AND 3 AND MEASUREMENT TABLE.

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