Service difficulty report · Floorbeam · Boeing 7378H4

Difficulty date
April 21, 2023
Submitted
May 16, 2023
Operation
Air carrier
Aircraft
N8534Z
Make and model
Boeing 7378H4
Aircraft serial
63578
Aircraft time
19,732 hours, 9,539 cycles
Part
Floorbeam
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 947 FLOORBEAM UPPER SURFACE AT LBL 23; LBL 49; LBL 52; WL 208.<[01] VERIFIED THE APPLICABILY OF SRM 53-70-51-1A-1;[02] EVALUATED CORROSION ON 947 FLOORBEAM UPPER SURFACE AT LBL 23; LBL 49; LBL 52 AND FOUND TO BE OUT LIMITS DUE TO LOSS OF MATERIAL EXCEED LIMITS GIVEN PER SRM LBL52 0.750'X0.500' ORIGINAL MATERIAL THICKNESS IS 0.180' REMAINING MATERIAL THICKNESS IS 0.100' ALL I.A.W SRM 53-70-51-1A-1 <BR>USING DEPTH GAGE<BR>ID NCX000697<BR>DUE 09/2023;[03] DAMAGE ON 947 FLOORBEAM UPPER SURFACE AT LBL 23; LBL 49; LBL 52 TO BE REPAIRED ON COSTUMER CARD TTG8Q00KKYYE I.A.W SRM 53-70-51-2R-5 REPAIR 5 ALTERNATIVE 2 FROM RBL 50-LBL58.6;[04] VERIFIED CORRECTIVE ACTION ITEMS 1; 2; 3. FAULT TO BE REPAIRED ON TTG8Q00KKYYE.<BR>VERIFIED MEASUREMENT TABLE COMPLETED.

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