Service difficulty report · Floorbeam · Boeing 7378H4

Difficulty date
May 25, 2023
Submitted
June 19, 2023
Operation
Air carrier
Aircraft
N8669B
Make and model
Boeing 7378H4
Aircraft serial
36655
Aircraft time
26,834 hours, 12,722 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

AFT GALLEY STA. 947.5 LBL 24.75 CORROSION AROUND TIE-DOWN FITTING.<[01] CORROSION DAMAGE OUT OF LIMITS PER SRM 53-70-51-1A-1;[02] VERIFIED CORRECTIVE ACTION STEP #1;[03] CUTOUT DAMAGED UPPER CHORD OF FLOOR BEAM AT STA 947.5 FROM LBL 9 TO LBL 42 PER SRM 53-70-51-2R-5; FIG. 203 AND FIG. 206 DETAIL D.;[04] PERFORMED DETAILED VISUAL INSPECTION OF THE CUT EDGE; AND NDT PART 6 51-00-00 HFEC ON DAMAGE CUTOUT. NO DEFECTS NOTED.;[05] FLAP PEENED CUTOUT AREA I.A.W SRM 53-70-51-2R-5.;[06] FLAP PEENED CUTOUT AREA I.A.W SRM 53-70-51-2R-5. COMPLIED WITH INSPECTION.;[07] FABRICATED ALL REPAIR PARTS I.A.W SRM 53-70-51-2R-5.;[08] INSPECTED THE WORK PERFORMED ON C/A #7; NO DEFECTS NOTED.;[09] TREATED AND PRIMED ALL REPAIR PARTS I.A.W AMM 51-21-00.;[10] INSPECTED THE WORK PERFORMED ON C/A #9; NO DEFECTS NOTED.;[11] OK TO INSTALL REPAIR PARTS;[12] INSTALLED REPAIR PARTS: T-CHORD; SPLICE ANGLES AND STRAPS PER SRM 53-70-51-2R-5.;[13] VERIFIED CORRECTIVE ACTION STEP #12;[14] COMPLETED REPAIR OF FLOOR BEAM AT STA 947.5 LBL 24.75 PER SRM 53-70-51-2R-5 AND REATTACHMENT OF ADJACENT STRUCTURE PER SRM 51-40-02.

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