Service difficulty report · Floorbeam · Boeing 7377BD

Difficulty date
April 6, 2023
Submitted
May 5, 2023
Operation
Air carrier
Aircraft
N7747C
Make and model
Boeing 7377BD
Aircraft serial
36091
Aircraft time
50,468 hours, 25,711 cycles
Part
Floorbeam
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 WET AREA FLOOR BEAM AT 986 44 INCHES RIGHT BUT LINE UPPER 'T' CORD IS CORRODED AFT WET AREA FLOOR BEAM AT 986.5 44 INCHES RIGHT BUT LINE UPPER 'T' CORD IS CORRODED.<[01] STARTED FABRICATION AFT WET FLOOR BEAM UPPER CHORD STA 986.5 BETWEEN RBL-38 TO RBL-47 MATERIAL USED STRAP 7075-T6.100;ANGLE REPAIR BAC1490-2886 7075-T6; AND FILLER REPAIR 7075-T6.150 REF USED SRM 53-70-51-2R-6 FIG 205 DETAIL A-A;[02] ACCOMPLISHED AFT WET FLOOR BEAM UPPER CHORD AT STA 986.5 BETWEEN RBL-38 TO RBL-47 REF USED SRM 53-70-51-2R-6 FIG 205 DETAIL A-A TABLE 204;[03] VERIFIED WORKMANSHIP OF REPAIR PER LEADERSHIP REQUEST;[04] VERIFIED STEP 1 THRU 3

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