Service difficulty report · Floorbeam · Boeing 7377H4

Difficulty date
September 7, 2023
Submitted
October 16, 2023
Operation
Air carrier
Aircraft
N448WN
Make and model
Boeing 7377H4
Aircraft serial
33721
Aircraft time
64,386 hours, 38,370 cycles
Part
Floorbeam
Part number
UNKNOWN
Condition
Cracked
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

CRACK PLATE FLOOR STRUCTURE BS 540 BTW RBL 24.75 TO RBL 45.50 AT PASSENGER CABIN 2023-569463<[01] REPLACED PLATE FLOOR STRUCTURE BS 540 BTW LBL 24.75 TO LBL 45.50 AT PASSENGER CABIN IAW B737-700 SRM 51-40-02 AND #DWG: 143A5240 SHEET: 12 REV:-;[02] CORRECTED STEP 1<BR>REPLACED PLATE FLOOR STRUCTURE BS 540 BTW LBL 24.75 TO LBL 45.50 AT PASSENGER CABIN IAW B737-700 SRM 51-40-02 AND #DWG: 143A5240 SHEET: 12 REV:-. SEE INDIVIDUAL SIGNOFF BELOW.[06] REPLACED PLATE FLOOR STRUCTURE BS 540 BTW RBL 24.75 TO RBL 45.50 AT PASSENGER CABIN IAW B737-700 SRM 51-40-02 AND #DWG: 143A5240 SHEET: 12 REV:-. MATERIAL USTED ALUMINIUM SHEET P/N: 2024-T3 0.011? P/O: 2015506369. SEE INDIVIDUAL SIGNOFF BELOW.

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