Service difficulty report · Support · Boeing 7377H4

Difficulty date
May 2, 2023
Submitted
June 1, 2023
Operation
Air carrier
Aircraft
N961WN
Make and model
Boeing 7377H4
Aircraft serial
36962
Aircraft time
37,902 hours, 23,158 cycles
Part
Support
Condition
Corroded
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

CORROSION ON FLOOR TO SIDEWALL SUPPORT AT STA 400+14; 460+10; 460+14; 480+6; 480+10; 480+12; 480+14; 480+14; 480+15; 480+18; LBL 24; WL 156.<[01] VERIFIED APPLICABILITY FOR ALLOWABLE DAMAGE LIMITS OF FCB FLOOR TO SIDEWALL SUPPORT LBL 24 WL 156 IAW SRM 53-00-53-1A-2 ALLOWABLE DAMAGE 2.;[02] STEP#1-10 COMPLETED;[03] TABLE MEASUREMENT COMPLETED;[04] VERIFIED CORRECTIVE ACTIONS 1-3 AND MEASUREMENT TABLE.;[05] REMOVED FLOOR SUPPORT FOR ACCESS BS 396 RBL AND LBL WL 156 IAW SRM 51-40-02;[06] REMOVED FLOOR TO SIDEWALL SUPPORT AT STA 396 TO 500D LBL 24; WL 156.IAW SRM 51-40-02;[07] FABRICATED PARTS AND SPLICE REPAIR PER DWG# 143A7501 AND B737-700 SRM 53-0053-2R REPAIR 6 TRAETED PER SOPM 20-41-02 PARTS OK TO PRIME;;[18] INSTALLED FCB FLOOR TO SIDEWALL SUPPORT BS 396 TO BS 500D LBL 24 WL 156 IAW SRM 51-40-02 AND DWG 143A7500 REV:-;[19] VERIFIED CORRECTIVE ACTION 18;[20] REINSTALLED FLOOR SUPPORT FOR ACCESS BS 396 RBL AND LBL WL 156 IAW SRM 51-40-02 AND DWG 284A0603 REV:-;[21] VERIFIED CORRECTIVE ACTION STEP 20.;[22] VERIFIED MEASUREMENT TABLE AND TASK CARD COMPLETE.

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