Service difficulty report · Sidewall Support · Boeing 7377H4

Difficulty date
June 16, 2021
Submitted
July 14, 2021
Operation
Air carrier
Aircraft
N226WN
Make and model
Boeing 7377H4
Aircraft serial
32494
Aircraft time
53,110 hours, 31,655 cycles
Part
Sidewall Support
Condition
Corroded
Location
Bs 400-420
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 FWD CARGO BAY BS400-BS420 RBL23 WL156. ; / [01] REMOVED SIDEWALL SUPPORT ANGLE AT BS420; RBL23; WL156 IAW SRM 51-40-02<BR>REMOVED CORROSION ON SIDEWALL SUPPORT ANGLE L:1'; W:1'; D:0.010';WAS FOUND OUT OF LIMIT DUE MATERIAL LOSS EXCEED 10% OF THICKNESS IAW SRM 53-00-53-1A-2; [02] VERIFIED; [03] FABRICATED LOCATED AND DRILLED NEW FLOOR TO SIDEWALL SUPPORT AT FWD CARGO BAY BS400-BS420D RBL23 WL156; FROM EXTRUSION BAC1496-444#7075T62 LOT#1440365-1; IAW SRM 51-40-05-0G-0 AND DWG 143A7500; APPLIED CHEMICAL CONVERSION COATING IAW SRM 51-20-01-0G-0; OK TO PRIME.; [04] VERIFIED FABRICATED LOCATED AND DRILLED NEW FLOOR TO SIDEWALL SUPPORT AT FWD CARGO BAY BS400-BS420D RBL23 WL156; FROM EXTRUSION BAC1496-444#7075T62 LOT#1440365-1; IAW SRM 51-40-05-0G-0 AND DWG 143A7500;

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