Service difficulty report · Sidewall Support · Boeing 7377H4

Difficulty date
March 17, 2023
Submitted
April 25, 2023
Operation
Air carrier
Aircraft
N957WN
Make and model
Boeing 7377H4
Aircraft serial
41528
Aircraft time
38,518 hours, 23,626 cycles
Part
Sidewall 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

AFT CARGO COMPARTMENT - MULTIPLE AREA OF CORROSION ON SIDEWALL SUPPORT AT BS 727 TO BS 767 RBL 21.75 WL 155. (MARKED)<[01] VERIFIED APPLICABILITY FOR IDENTIFICATION IAW SRM 53-60-53-0I-2<BR>AND ALLOWABLE DAMAGE IAW SRM 53-00-53-1A-2;[02] REMOVED CORROSION ON AFT CARGO BAY FLOOR TO SIDEWALL SUPPORT AT RBL 21.75 BS 727A+2' WL 155<BR>DIMENSIONS L=.900' W= .700' DEPTH:0.020'<BR>ORIGINAL MATERIAL THICKNESS 0.040' IAW BAC 1496-377 REMAINING THICKNESS: 0.020'<BR>AND FOUND TO BE OUT OF LIMITS; IAW SRM 53-00-53-1A-2<BR>TOOL USED: ID ATS 1698 S/N: 1505370 DUE: 05/2023;[03] VERIFIED CORRECTIVE ACTION STEPS 1 AND 2.;[04] RECEIVED ZEE CHANNEL P/N 146A7502-51 LOT: 1519356-2.<BR>LOCATED AND DRILLED AT AFT CARGO COMPARTMENT FLOOR TO SIDEWALL SUPPORT BETWEEN BS 727 - BS 767RBL 21.75 WL. 155 IAW SRM 51-40-05 DWG# 146A7500.;[05] THE INSTALLATION WILL BE ACCOMPLISHED WITH CUSTOMER CARD # TTG8Q0049HEA;[06] UPDATED PARTS USAGE;[07] VERIFIED CORRECTIVE ACTION ITEMS AND MEASUREMENT FIELDS; CARD COMPLETE.

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