Service difficulty report · Floorbeam · Boeing 7378H4

Difficulty date
December 17, 2024
Submitted
January 23, 2025
Operation
Air carrier
Aircraft
N8518R
Make and model
Boeing 7378H4
Aircraft serial
63593
Aircraft time
26,817 hours, 13,369 cycles
Part
Floorbeam
Condition
Corroded
Location
Zone 200
Stage of operation
IN
How discovered
O
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

DOT#61 A-043 AFT CABIN WET AREA FLOOR BEAM CORRODED AROUND DOMENUT HOLE AT STA 986 RBL 44 WL 208<[01] REMOVED DOMENUT ON STA 986 RBL 44 WL 208 I.A.W. SRM 51-40-02-0G-0<BR>REMOVED CORROSION ON AFT CABIN WET AREA FLOOR BEAM CORRODED AROUND DOMENUT HOLE AT STA 986 RBL 44 WL 208 I.A.W. SRM 51-10-02-0G-0<BR>EVALUATED DAMAGE AND FOUND TO BE OUT OF LIMITS IAW SRM 53-70-51-1A-1 STEP: 4.H(2)(B)<BR>ORIGINAL: 0.150'<BR>REMAINING: 0.131'<BR>MATERIAL VERIFICATION STRAP [1]<BR>ATAG: A220701<BR>P/N: 7075-T6-100<BR>MATERIAL VERIFICATION SHIM [2]<BR>ATAG: A25754<BR>P/N: 7075-T6-020<BR>IAW SRM 53-70-51-2R-6 STEP: 2.B; ALTERNATIVE 3; TABLE 203.<BR>FABRICATED REAPAIR PARTS IAW SRM 57-70-51-2R-6 STEP: 4.F(3) TABLE 203/ REPAIR 6 & FIGURE 204/ REPAIR 6<BR>PERFORMED FLAP PEENING IAW SRM 57-70-51-2R-6 STEP: 4.E<BR>TOOL USED: STAAR 26822<BR>DUE: 06/03/25<BR>APPLIED TREAT & PRIMER TO THE REPAIR PARTS & REPAIR AREA IAW SRM 57-70-51-2R-6 STEP: 4.K & L<BR>INSTALLED PLUGS<BR>INSTALLED NUT PLATE<BR>ATAG: D49362<BR>P/N: BACN10Z4B2<BR>INSTALLED REPAIR PARTS IAW SRM 57-70-51-2R-6 STEP: 4.M TO Q<BR>APPLIED CIC IAW SRM 57-70-51-2R-6 STEP: 4.R;[02] 04 - REPAIRED PER [SRM 53-70-51-2R-6-B00676 (REPAIR 6 - SECTION 47 - SMALL CORROSION DAMAGE ON THE UPPER CHORD OF THE FLOOR BEAM AT STA 986.5 - PERMANENT)];[03] COMPLETE;[04] COMPLETE <BR>AUDIT C/W

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