Service difficulty report · Sidewall Support · Boeing 7378H4

Difficulty date
September 12, 2022
Submitted
October 5, 2022
Operation
Air carrier
Aircraft
N8651A
Make and model
Boeing 7378H4
Aircraft serial
36920
Aircraft time
27,317 hours, 12,717 cycles
Part
Sidewall Support
Part number
146A750256
Condition
Corroded
Location
Aft 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

AFT CARGO BAY R/H FLOOR TO SIDEWALL SUPPORT PLATE HAS CORROSION AT BS867+15; RBL21; WL168 / [01] EVALUATED CORROSION ON FLOOR TO SIDEWALL SUPPORT BS 867+15 RBL 21 WL 168; FOUND 0.015 REMOVED FROM ORIG 0.040 IN 1'X1' AREA; FOUND TO BE OUT OF LIMITS PER SRM 53-00-53-1A-2 USING DIAL DEPTH GAUGE ATS 2678 DUE 04/2023;[02] VERIFIED CORRECTIVE ACTIONS STEP 1 AND MEASUREMENTS TABLE.;[03] REMOVED DAMAGED FLOOR TO SIDEWALL SUPPORT PLATE SECTION AT BS 867 TO BS 887 RBL 21 WL 168 IAW SRM 51-40-02-0G-0;[04] LOCATED AND DRILLED NEW ACB R/H FLOOR TO SIDEWALL SUPPORT PLATE BS867 T0 BS887+4; RBL21; WL168 PER DWG 146A7500 AND SRM 51-40-02-0G-0. OK TO INSTALL.;[05] VERIFIED CORRECTIVE ACTION #4;[06] INSTALLED NEW ACB R/H FLOOR TO SIDEWALL SUPPORT PLATE BS867 T0 BS887+4; RBL21; WL168 PER DWG 146A7500 AND SRM 51-40-02-0G-0.;[07] VERIFIED CORRECTIVE ACTION #6

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