Service difficulty report · Floorbeam · Boeing 7378H4

Difficulty date
December 4, 2023
Submitted
December 28, 2023
Operation
Air carrier
Aircraft
N8676A
Make and model
Boeing 7378H4
Aircraft serial
36941
Aircraft time
26,986 hours, 13,173 cycles
Part
Floorbeam
Part number
UNKNOWN
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

FLOOR BEAM BS947 CORRODED UNDER AND AROUND LAV MOUNT RBL50.5<[01] REMOVED CORROSION ON TOP OF UPPER CHORD OF FLOOR BEAM STA 947.5 RBL 50.5 (REMOVED 0.039? OF .180? MATERIAL) FOUND TO BE OUT OF LIMITS PER SRM 53-70-51-1A-1.;[02] INSPECTION C/W REMOVED CORROSION ON TOP OF UPPER CHORD OF FLOOR BEAM STA 947.5 RBL 50.5 (REMOVED 0.039? OF .180? MATERIAL) FOUND TO BE OUT OF LIMITS PER SRM 53-70-51-1A-1.;[03] C/W FALLOW UP INSPECTION OF REPAIR AREA; FALLOWING DAMAGE REMOVAL.;[04] BLENDED DAMAGED AREA ON TOP OF UPPER CHORD OF FLOOR BEAM STA 947.5 RBL 51 IAW SRM 53-70-51-2R-8 ALTERNATIVE 3.;[05] VERIFIED DAMAGE BLEND OUT (CA #4).;[06] ACCOMPLISHED HFEC HOLE PROBE AND SURFACE INSPECTION OF REPAIR AREA PER NDT PART 6 51-00-00 PROC. 16 AND 51-00-00 PROC. 23 NO DEFECTS NOTED;[07] REMOVED ADDITIONAL .002' IAW SRM 51-10-02.;[08] FLAP PEENED BLENDED AREA IAW SOPM 20-10-03.;[09] FABRICATED SHIM AND LOCATED/DRILLED FASTENER HOLES IAW SRM 51-40-05.;[10] C/W C/A #7;8;9;[11] REPAIRED IAW SRM 53-70-51-2R-8.;[12] C/W INSPECTION.;[13] C/W INSPECTION.

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