Service difficulty report · Stiffener · Boeing 7377H4

Difficulty date
August 12, 2023
Submitted
August 31, 2023
Operation
Air carrier
Aircraft
N410WN
Make and model
Boeing 7377H4
Aircraft serial
27897
Aircraft time
72,550 hours, 42,916 cycles
Part
Stiffener
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 STIFFENER FLOOR STRUCTURE LOCATED BS540 BETWEEN BL0 TO RBL 24.75 CENTER SECTION 2023-508412<[01] REPLACED STIFFENER AND FASTENERS ON FLOOR STRUCTURE LOCATED BS540 BETWEEN BL0 TO RBL 24.75 CENTER SECTION IAW B737-700 SRM 51-40-02; SRM 51-40-02 AND DWG 143A0060 REV: B. SEE INDIVIDUAL SIGNOFFS BELOW.;[02] CORRECTED STEP 1.<BR>REPLACED STIFFENER AND FASTENERS ON FLOOR STRUCTURE LOCATED BS540 BETWEEN BL0 TO RBL 24.75 CENTER SECTION IAW B737-700 SRM 51-40-02; SRM 51-10-02 AND DWG 143A0060 REV: B. SEE INDIVIDUAL SIGNOFFS BELOW.;[03] REPLACED STIFFENER AND FASTENERS ON FLOOR STRUCTURE LOCATED BS540 BETWEEN BL0 TO RBL 24.75 CENTER SECTION IAW B737-700 SRM 51-40-02; SRM 51-10-02 AND DWG 143A0060 REV: B. SEE INDIVIDUAL SIGNOFFS BELOW.AS RII JOB COMPLETED.

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