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 PLATE LOCATED AT BS 540 BETWEEN LBL 24.5 AND LBL 45 WL 208.1 CENTER SECTION 2022-688200<[01] REPLACED STIFFENER FLOOR STRUCTURE PLATE LOCATED AT BS 540 BETWEEN LBL 24.5 AND LBL 45 WL 208.1 CENTER SECTION IAW B737-700 SRM 51-10-02; ITEM 9; SRM 51-40-02 AND DWG NO. 143A0060; SHEET 2; REV. B<BR>SEE INDIVIDUAL SING OFFS BELOW.;[02] TASK CARD COMPLETED RII CERTIFIED;[03] CORRECTED STEP 1. <BR>REPLACED STIFFENER FLOOR STRUCTURE PLATE LOCATED AT BS 540 BETWEEN LBL 24.5 AND LBL 45 WL 208.1 CENTER SECTION IAW B737-700 SRM 51-10-02; ITEM 9; SRM 51-40-02 AND DWG NO. 143A0060; SHEET 2; REV. B <BR>SEE INDIVIDUAL SIGN OFFS BELOW.;[04] TASK CARD COMPLETED RII CERTIFIED

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