Service difficulty report · Bulkhead Web · Boeing 7377H4

Difficulty date
August 17, 2022
Submitted
September 28, 2022
Operation
Air carrier
Aircraft
N431WN
Make and model
Boeing 7377H4
Aircraft serial
29845
Aircraft time
66,939 hours, 39,408 cycles
Part
Bulkhead Web
Condition
Cracked
Location
Bs 663
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 FOUND AT MAIN CABIN HORIZONTAL PRESSURE WEB STA 663 + 2'; APPROX LBL 34. CRACK LENGTH 0.531'. CRACK FOUND AT MAIN CABIN HORIZONTAL PRESSURE WEB STA 663 + 2' APPROX LBL 34. CRACK LENGTH 0.531'. / [01] REMOVED FASTENERS AT PRESSURE DECK WEB BETWEEN STA 663.75 AND STA 675 FROM LBL 30 TO LBL 60 REF B737-700 SRM 51-40-02-0G-0.[09] STARTED TO FABRICATED REPAIR PARTS FOR MAIN CABIN L/H HORIZONTAL PRESSURE DECK WEB BETWEEN STA 663.75 AND STA 675 REF B737-700 SRM 53-40-51-2R-2 FIG 203 TABLE 202.;[10] COMPLETED FABRICATION REPAIR PARTS FOR MAIN CABIN L/H HORIZONTAL PRESSURE DECK WEB BETWEEN STA 663.75 AND STA 675 FROM LBL 30 TO LBL 60 MATERIAL USED 2024-T3 0.020' PO# 1645137; 2024-T3 0.063' PO# 177121; 2024-T3 0.080' PO# 1758946; 2024-T3 0.090' PO# 1727238 AND EXTRUSION BAC1505-100052T6511 PO# 1745253 REF B737-700 SRM 53-40-51-2R-2 FIG 203 TABLE 202.;

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