Service difficulty report · Sidewall Support · Boeing 7378H4

Difficulty date
March 27, 2023
Submitted
April 27, 2023
Operation
Air carrier
Aircraft
N8529Z
Make and model
Boeing 7378H4
Aircraft serial
36974
Aircraft time
19,992 hours, 9,666 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

CORROSION AFT CARGO BAY R/H FLOOR TO SIDEWALL SUPPORT PLATE HAS MULTIPLE AREAS AROUND NUT PLATE HOLES BS727G+10' TO BS767 RBL21.5 WL156<FOUND TO BE OUT OF LIMITS PER SRM 53-00-53-1A-2 USING ATS TOOL ID ATS 2473 DUE 08/2023;[02] VERIFIED CORRECTIVE ACTION 1 AND MEASUREMENT TABLE;[03] REMOVED AFT CARGO BAY R/H FLOOR TO SIDEWALL SUPPORT SECTION BS727F+12 - BS767 IAW SRM 53-00-53-2R-5.;[04] REMOVED AFT CARGO BAY R/H FLOOR TO SIDEWALL SUPPORT SECTION BS727F+12 - BS767 RBL21.5 WL156 IAW SRM 53-00-53-2R-5.;[05] FABRICATED REPAIR PARTS FOR ACB RH FLOOR TO SIDEWALL SUPPORT; BS727F+12 TO 767; RBL 21.5; MATERIAL BAC1496-377#7075T62 LOT#1521599-1 APPLIED CHEMICAL CONVERSION COATING; ALL IAW SRM53-00-53-2R-5; SRM 51-20-01-0G-0; SRM 51-40-05-0G-0; SRM 51-40-02-0G-0. EA M-22-153-01550. AND OK TO PRIME.;[06] VERIFIED CORRECTIVE ACTION 5; OK TO PRIME.;[07] PRIMED AND ASSEMBLED REPAIR PARTS FOR ACB RH FLOOR TO SIDEWALL SUPPORT; BS 727F+12 TO 767 RBL21.5; IAW SRM 53-00-53-2R-5; EA M-22-153-01550. AND OK TO INSTALL.;[08] VERIFIED STEP 7; OK TO INSTALL.;[09] INSTALLED ACB REPAIR PARTS FOR RH FLOOR TO SIDEWALL SUPPORT BS 727F+12 TO 767; RBL 21.5; SPLICE AT BS 727F+12; ALL IAW SRM 51-40-02-0G-0; SRM 53-00-53-2R-5; DWG 146A7500; EA M-22-153-01550.;[10] THE DAMAGE WAS REPAIRED PER SRM 53-00-53-2R-5 (REPAIR 5) AND EA M-22-153-01550'.;[11] VERIFIED STEP 9;[12] VERIFIED STEP 10

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