Service difficulty report · Rib · Boeing 7377H4

Difficulty date
July 23, 2026
Submitted
August 18, 2026
Operation
Air carrier
Aircraft
N952WN
Make and model
Boeing 7377H4
Aircraft serial
36667
Aircraft time
50,751 hours, 31,247 cycles
Part
Rib
Condition
Cracked
Location
Zone 300
Stage of operation
IN
How discovered
V
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 ACCESS PANEL 321A LEADING EDGE RIB 8 VERTICAL STABILIZER 2026-443094 REPLACED RIB ASSY 8 AND FASTENERS OF THE ACCESS PANEL 321A AT VERTICAL STABILIZER FIN IAW B737-700 SRM 51-40-02 B737-700 SRM 51-10-02 AND DWG 174A1008 SHEET 2 REV C AND 174A0103 SHEET 11 REV - SEE INDIVIDUAL SING OFF BELOW CORRECTED STEP 1: REPLACED RIB ASSY 8 AND FASTENERS OF THE ACCESS PANEL 321A AT VERTICAL STABILIZER FIN IAW B737-700 SRM 51-40-02 B737-700 SRM 51-10-02 AND DWG 174A1008 SHEET 2 REV C AND 174A0103 SHEET 11 REV - SEE INDIVIDUAL SIGN OFF BELOW TASK COMPLETED

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