Service difficulty report · Beam · Boeing 7378H4

Difficulty date
February 6, 2023
Submitted
March 10, 2023
Operation
Air carrier
Aircraft
N8524Z
Make and model
Boeing 7378H4
Aircraft serial
36970
Aircraft time
20,203 hours, 9,817 cycles
Part
Beam
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; FWD FLANGE UPPER SURFACE AT LBL 24; LBL 50; WL 208.<[01] REMOVED CORROSION ON 947 FLOORBEAM; FWD FLANGE UPPER SURFACE AT LBL 24; IN AN AREA OF 0.5'X2'X0.081; AT LBL 50; IN AREA OF 0.125'X3.4'X0.05'; AT LBL24; AREA FOUND TO BE OUT OF LIMITS; AT LBL50; AREA FOUND TO BE IN LIMITS IAW SRM 53-70-51-1A-1;[02] VERIFIED THE APPLICABILITY OF SRM 53-70-51-1A-1;[03] TOOL USED ID ATS1737; DATE:08/2022-08-2023;[04] VERIFIED CORRECTIVE ACTIONS 1; 2; AND 3.;[05] ACCESS AND REPAIR OF 947 FLOORBEAM WILL BE ACCOMPLISHED ON CARD TTG8Q00HP9VH.;[06] VERIFIED CORRECTIVE ACTION STEPS 1-5. VERIFIED MEASUREMENT TABLE AND TASK CARD COMPLETE.

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