Service difficulty report · Support · Boeing 7377H4

Difficulty date
April 19, 2023
Submitted
May 25, 2023
Operation
Air carrier
Aircraft
N959WN
Make and model
Boeing 7377H4
Aircraft serial
36674
Aircraft time
38,285 hours, 23,370 cycles
Part
Support
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

WING BOX CENTER SECTION - FLOOR SUPPORT HAS A CRACK BS 540 LBL 2<[01] REMOVED CRACKED WING BOX CENTER SECTION - FLOOR SUPPORT BS 540 BL 0 - LBL 25 IAW SRM 51-40-02;[02] LOCATED AND DRILLED NEW WING BOX CENTER SECTION - FLOOR SUPPORT BS 540 BL 0 - LBL 25 IAW SRM 51-40-05 AND DWG 143A5240 ; OK TO INSTALL;[03] VERIFIED CORRECTION ACTION ITEM 2; OK TO INSTALL GIVEN.;[04] INSTALLED NEW FLOOR SUPPORT PER SRM 51-40-05 AND DWG 143A5240;[05] VERIFIED CORRECTIVE ACTION 4.;[06] VERIFIED THE MEASUREMENT TABLE.

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