Service difficulty report · Floorbeam · Boeing 7378H4

Difficulty date
September 29, 2024
Submitted
October 22, 2024
Operation
Air carrier
Aircraft
N8507C
Make and model
Boeing 7378H4
Aircraft serial
41531
Aircraft time
26,311 hours, 13,166 cycles
Part
Floorbeam
Condition
Corroded
Location
Zone 200
Stage of operation
IN
How discovered
V
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 WET AREA STRUCTURE HAS LIGHT CORROSION AROUND FASTENER HOLE STA 986.5 LBL 43.<[01] BLENDED OUT DAMAGE PER SRM 53-70-51. ORIGINAL METAL THICKNESS IS .156. REMAINING MATERIAL AFTER DAMAGE REMOVAL .114. DAMAGE OUT OF LIMITS AND REQUIRES REPAIR.;[02] CUT AND REMOVED FWD FLANGE ON THE UPPER CHORD OF STA. 987 FLOOR BEAM AT APPROXIMATELY LBL 44' PER SRM 53-70-51-2R-6; ALTERNATIVE 4.;[03] PREFORMED HFEC SURFACE INSPECTION PER BOEING NDT PART 6 51-00-00 PROCEDURE 4 NO FAULTS FOUND;[04] PREFORMED HFEC FASTENER HOLE INSPECTION PER BOEING NDT PART 6 51-00-00 PROCEDURE 16 NO FAULTS FOUND;[05] PREFORMED A DVI OF CUT OUT AREA NO DAMAGE FOUND;[06] FLAP BEEN THE CUT EDGE IAW SRM 53-70-51-2R-6; ALTERNATIVE 4.;[07] INSPECTED WORK ABOVE;[08] RII-FABRICATED REPAIR PARTS PER SRM 53-70-51-2R-6; ALTERNATIVE 4.;[09] INSPECTED WORK ABOVE;[10] TREATED AND PRIMED PER SRM 51-20-01 AND SOPM 20-41-01. OK TO INSTALL.;[11] 02 - INSPECTED PER [REFERENCE] SOPM 20-41-01 AND SRM 53-70-51 OK TO INSTALL PARTS.;[12] INSTALLED PER SRM 53-70-51-2R-6; ALTERNATIVE 4.;[13] 02 - INSPECTED 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)]

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