Service difficulty report · Support · Boeing 7377H4

Difficulty date
June 18, 2023
Submitted
August 14, 2023
Operation
Air carrier
Aircraft
N444WN
Make and model
Boeing 7377H4
Aircraft serial
29839
Aircraft time
66,457 hours, 39,411 cycles
Part
Support
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

MAIN CABI CENTER WING BOX FLOOR SUPPORT INNER CHORD CRACKED AT STA 520 LBL 64 WL 208.1<[01] VERIFIED / INSPECTED REPAIR ACCOMPLISHED AT CABIN FLOOR STRUCTURE STA 520 LBL 64 WL 208.1. FABRICATED PARTS REPAIR DOUBLERS. INSTALLED. REF. FABRICATED INNER CHORD CREASE BEAM SECTION FROM AL 7050-T7451 PLATE PO# 2028332 PER B737-700 SRM 51-70-12-2R-2 TABLE 202 AND 51-20-01-0G-0. INSTALLED REPAIR PARTS PER B737-700 SRM 51-70-12-2R-2.;[02] REPAIRED MAIN CABI CENTER WING BOX FLOOR SUPPORT INNER CHORD AT STA 520 LBL 64 WL 208.1 AS PER SRM 51-70-12-2R-2.;[03] RII -- VERIFIED REPAIR OF MAIN CABIN CENTER WING BOX FLOOR SUPPORT INNER CHORD AT STA 520 LBL 64 WL 208.1.

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