Service difficulty report · Sidewall Support · Boeing 7377H4

Difficulty date
June 21, 2022
Submitted
July 27, 2022
Operation
Air carrier
Aircraft
N486WN
Make and model
Boeing 7377H4
Aircraft serial
33852
Aircraft time
59,624 hours, 35,506 cycles
Part
Sidewall Support
Part number
143A750180
Condition
Corroded
Location
Fwd Cargo Bay
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 FWD CARGO BAY FLOOR TO SIDEWALL SUPPORT AT LBL 24 BS 500A+14; BS 500A+18; BS 500B+2; BS 500B+6; BS 500B+14; BS 500B+18; BS 500C+2. / ;FOUN TO BE OUT OF LIMITS IAW 53-00-53-1A-2 USED TOOL ID ATS 1672 S/N 65092939 DUE 03/2023 FABRICATED LOCATED AND DRILLED FLOOR TO SIDEWALL SUPPORT AT FWD CARGO BAY BETWEEN BS400 TO BS500D LBL24 WL154; FROM EXTRUSION BAC1496-444#7075T62; LOT #14990548-1 IAW SRM 51-40-05-0G-0 AND DWG 146A7500; AND FABRICATED REPAIR SPLICE BETWEEN AT BS 480TO500 LBL224 IAW SRM 53-00-53-2R-5 REPAIR 5;. CORRECTION:FABRICATED LOCATED AND DRILLED FLOOR TO SIDEWALL SUPPORT AT FWD CARGO BAY BETWEEN BS400 TO BS500D LBL24 WL154; FROM EXTRUSION BAC1496-444#7075T62; LOT #14990548-1 IAW SRM 51-40-05-0G-0 AND DWG 146A7500; AND FABRICATED REPAIR SPLICE BETWEEN AT BS 480TO500 LBL24 IAW SRM 53-00-53-2R-5 REPAIR 5;FABRICATED LOCATED AND DRILLED FLOOR TO SIDEWALL SUPPORT AT FWD CARGO BAY BETWEEN BS400 TO BS500D LBL24 WL150; FROM EXTRUSION BAC1496-444#7075T62; LOT #14990548-1 IAW SRM 51-40-05-0G-0 AND DWG 146A7500; AND FABRICATED REPAIR SPLICE BETWEEN AT BS 480TO500 LBL24 IAW SRM 53-00-53-2R-5 REPAIR 5; INSTALLED PARTS ON SIDEWALL SUPPORT AT LBL24 BS396 TO BS500D;IAW SRM 51-40-02; 53-00-53 ;DRAWING FABRICATION #143A7501 REV B.

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