Service difficulty report · Support · Boeing 7377H4

Difficulty date
September 1, 2022
Submitted
October 10, 2022
Operation
Air carrier
Aircraft
N952WN
Make and model
Boeing 7377H4
Aircraft serial
36667
Aircraft time
39,061 hours, 23,816 cycles
Part
Support
Condition
Corroded
Location
Fuselage
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 BS500+10 - BS500B LBL23. / [01] REMOVED CORROSION ON FLOOR TO SIDEWALL SUPPORT AT CARGO BAY BS 500+10 AND BS 500B LBL32 AT DISCREPANCY AREA BS.500+10 L=1.500' W=0.700' D=0.011 ORIGINAL THICKNESS 0.040 REMAINING MAT 0.029 MAT LOSS 0.011 FOUND TO BE OUT OF LIMITS IAW SRM 53-00-53-1A-2 USED TOOL ID ATS 1672 DUE 03/2023 VERIFIED SRM APPLICABILITY AND OUT OF LIMITS PER SRM 53-00-53-1A-2 STEP 4.A2;[02] REMOVED CORROSION ON FLOOR TO SIDEWALL SUPPORT AT CARGO BAY BS 500+10 AND BS 500B LBL23 AT DISCREPANCY AREA BS.500+10 L=1.500' W=0.700' D=0.011 ORIGINAL THICKNESS 0.040 REMAINING MAT 0.029 MAT LOSS 0.011 FOUND TO BE OUT OF LIMITS IAW SRM 53-00-53-1A-2 USED TOOL ID ATS 1672 DUE 03/2023 VERIFIED SRM APPLICABILITY AND OUT OF LIMITS PER SRM 53-00-53-1A-2 STEP 4.A2;[03] CORRECTED STATEMENT 1;[04] VERIFIED CORRECTIVE ACTION 2;[05] FABRICATED FWD CARGO BAY FLOOR TO SIDEWALL SUPPORT BS.400-500D FROM BAC1496-444#7075T62 LOT#1490548-1 AND SIDEPLATE REPAIR AT FLOOR PANEL SPLICE IAW SRM 53-00-53-2R-6 AND DWG 143A7501 OK TO APPLY A CHEMICAL CONVERSION COATING AND PRIMER;

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