Service difficulty report · Sidewall Support · Boeing 7377H4

Difficulty date
April 30, 2022
Submitted
June 9, 2022
Operation
Air carrier
Aircraft
N477WN
Make and model
Boeing 7377H4
Aircraft serial
33988
Aircraft time
60,414 hours, 35,826 cycles
Part
Sidewall Support
Condition
Corroded
Location
Fwd Cargo
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 FCB FLOOR TWO SIDEWALL SUPPORT BS400+10.5 AND BS400+14.5; RBL24.75; WL156. / [01] VERIFIED APPLICABILITY FCB FLOOR TO SIDEWALL SUPPORT IAW SRM 53-00-53-1A-2 ALLOWABLE DAMAGE 2;AND IDENTIFICATION IAW SRM 53-30-53-0I-2 IDENTICATION 2.;[02] UPDATE STEP 1-2;[03] CERTIFIED CORRECTIVE ACTION 1-2.;[04] STEP 1;2 PARTIAL UPDATED.;[05] ENSURED STEP 1-2 HAVE BEEN COMPLETED;[06] LOCATED; DRILLED; AND COUNTERSANK NEW FLOOR TO SIDEWALL SUPPORT MATERIAL USING BAC1496-444#7075T62 0.040 LOT# 1479718-1 IAW SRM 51-40-05-0G-0; SRM 51-40-08-0G-0; AND DWG 143A7501 REV:A;[07] APPLIED CHEMICAL CONVERSION COATING AND PRIMER IAW SRM 51-20-01-0G-0; AND SOPM 20-41-02;[08] INSTALLED NUT PLATES IAW SRM 51-40-05-0G-0 AND DWG 143A7501 REV:A;[09] VERIFIED CORRECTIVE ACTIONS #6; #7 AND #8;[10] UPDATED MEASUREMENTS;[11] UPDATED MEASUREMENTS;[12] VERIFIED UPDATED MEASUREMENTS;[13] VERIFIED COMPLETE.

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