Service difficulty report · Floor Support · Boeing 7378H4

Difficulty date
October 22, 2023
Submitted
November 30, 2023
Operation
Air carrier
Aircraft
N8553W
Make and model
Boeing 7378H4
Aircraft serial
63601
Aircraft time
19,705 hours, 9,889 cycles
Part
Floor Support
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

CORROSION ON FLOOR SUPPORT AT SEVERAL FASTENER HOLES BS947+3 LBL15 -LBL48<[01] REMOVED FLOOR SUPPORT BS 947 +3 LBL 16 TO LBL 24 IAW SRM 51-40-02.;[02] REMOVED INTERCOSTAL BS947 TO BS967 LBL 24 IAW SRM 51-40-02.;[03] REMOVED FLOOR SUPPORT ANGLE BS947 +3 LBL24 TO LBL48 IAW SRM 51-40-02.;[04] LOCATED/DRILLED REPLACEMENT INTERCOSTAL BS947 TO BS967 LBL 24 AND INSTALLED IAW SRM 51-40-02.;[05] LOCATED/DRILLED FLOOR SUPPORT ANGLE BS947 +3 LBL24 TO LBL48 AND INSTALLED IAW SRM 51-40-02.;[06] CORRECTIVE ACTION 5 SHOULD STATE LOCATED/DRILLED REPLACEMENT FLOOR SUPPORT ANGLE BS947 +3 LBL24 TO LBL48 AND INSTALLED IAW SRM 51-40-02.;[07] C/W INSPECTION.;[08] LOCATED AND DRILLED FLOOR SUPPORT P/N 147A5675-1 PER SRM 51-40-05. INSTALLED FLOOR SUPPORT AT STA 947 + 3?; LBL 16-LBL 24 PER SRM 51-40-02.;[09] INSPECTED AS REQUIRED. CORRECTIVE ACTION #8

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