Service difficulty report · Stiffener · Boeing 7377H4

Difficulty date
December 6, 2022
Submitted
December 29, 2022
Operation
Air carrier
Aircraft
N401WN
Make and model
Boeing 7377H4
Aircraft serial
29813
Aircraft time
73,533 hours, 43,472 cycles
Part
Stiffener
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 AT BS 540 BETWEEN BL0 AND LBL 24.5 WL 208.1. CENTER SECTION 2022-688188<[01] REPLACED STIFFENER FLOOR STRUCTURE LOCATED AT BS 540 BETWEEN BL0 AND LBL 24.5 WL 208.1. CENTER SECTION IAW B737-700 SRM 51-40-02 AND DRAWING 143A0060 REV B.<BR>SEE INDIVIDUAL SIGN OFFS BELOW.;[02] REPLACED STIFFENER FLOOR STRUCTURE LOCATED AT BS 540 BETWEEN BL0 AND LBL 24.5 WL 208.1. CENTER SECTION IAW B737-700 SRM 51-40-02 AND DRAWING 143A0060 REV B. RII;<BR>SEE INDIVIDUAL SIGN OFFS BELOW.

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