Service difficulty report · Floor Support · Boeing 7378H4

Difficulty date
April 19, 2024
Submitted
May 23, 2024
Operation
Air carrier
Aircraft
N8573Z
Make and model
Boeing 7378H4
Aircraft serial
64250
Aircraft time
19,244 hours, 9,887 cycles
Part
Floor Support
Part number
UNKNOWN
Condition
Corroded
Location
Bs 947 Lbl 52
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 GALLLEY FLOOR STRUCTURE STA. 947; LBL 52 HAS CORROSION AROUND LAV MOUNT.<[01] REMOVE DAMAGE IAW SRM 51-40-02. REWORKED ARE REMAINING THICKNESS IS OUT OF LIMIT PER SRM 53-70-51-1A-1 FIG 104 DETAIL E.;[02] REMOVED LAV. MOUNT INTERCOSTAL @LBL 52; FLOOR SUPPORT AT STA. 947+5; FLOOR SUPPORT AT LBL 52 TO F.O.M IAW SRM 51-40-02.;[03] REMOVED CORROSION DAMAGED IAW SRM 53-70-51-2R-8 REPAIR 8 ALT. 3 FIG. 205;[04] REMOVED CORROSION DAMAGED IAW SRM 53-70-51-2R-8 REPAIR 8 ALTERNATIVE 3 FIG. 205. REMAINING THICKNESS IS 0.155;[05] RII. VERIFIED CORROSION REMOVAL REF SRM 53-70-51-2R-8 REPAIR 8 ALTERNATIVE 3 FIG. 205. VERIFIED REMINING THICKNESS IS 0.155. SIGN OFF FOR CORRECTIVE ACTION #4 ONLY.;[06] FABRICATED AND DRILLED SHIM IAW SRM 53-70-51-2R-8 REPAIR 8 ALTERNATIVE 3 FIG. 205. OK TO TREAT AND PAINT.;[07] INSPECTED WORK PERFORMED ON C/A #6;[08] TREATED AND PAINTED SHIM AND BLENDED AREA PER AMM 51-21-41 AND 51-21-72. OK TO INSTALL.;[09] INSPECTED WORK PERFORMED ON C/A #8;[10] INSTALLED SHIM IAW SRM 53-70-51-2R-8 REPAIR 8 ALTERNATIVE 3 FIG. 205. OK TO REINSTALL LAV MOUNT AND INTERCOSTAL.;[11] INSPECTED WORK PERFORMED ON C/A #10

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