Service difficulty report · Support Plate · Boeing 7378H4

Difficulty date
April 17, 2023
Submitted
May 16, 2023
Operation
Air carrier
Aircraft
N8534Z
Make and model
Boeing 7378H4
Aircraft serial
63578
Aircraft time
19,732 hours, 9,539 cycles
Part
Support Plate
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 FWD CARGO BAY R/H FLOOR TO SIDEWALL SUPPORT PLATE MULTIPLE AREAS AROUND NUT PLATE HOLES BS500A TO BSBS500I RBL24.5 WL156<OUT OF LIMITS PER SRM 53-00-53-1A-2 USING ATS TOOL ID ATS 2473 DUE 08/2023;[02] VERIFIED CORRECTIVE ACTION 1- OUT OF LIMITS PER SRM 53-00-53-1A-2;[03] REMOVED FCB R/H FLOOR TO SIDEWALL SUPPORT BS500A TO BS500I; RBL24.5; WL156 PER SRM 53-00-53-2R-5 STEP 4. B.;[04] FABRICATED FCB R/H FLOOR TO SIDEWALL SUPPORT BS500A TO BS500I; RBL24.5; WL156; ALL REPAIR PARTS; SPLICE (BS500B + 12; RBL24.5; WL156) AND QTY (2) FILLERS. ALL FROM BAC1496-444#7075T62 EXT. CLAD LOT#1524635-1. PER SRM 53-00-53-2R-5 STEP 4. C. THRU H.; DWG 143A7500 AND EA M-22-153-01550.;[05] APPLIED CHEMICAL CONVERSION COATING TO FCB R/H FLOOR TO SIDEWALL SUPPORT AND ALL REPAIR PARTS BS500A TO BS500I; RBL24.5; WL156 PER SRM 53-00-53-2R-5 STEP 4. I. AND EA M-22-153-01550PPLIED PRIMER TO FCB R/H FLOOR TO SIDEWALL SUPPORT AND ALL REPAIR PARTS BS500A TO BS500I; RBL24.5; WL156 PER SRM 53-00-53-2R-5 STEP 4. J. AND EA M-22-153-01550.INSTALLED NUTPLATES TO FCB R/H FLOOR TO SIDEWALL SUPPORT AND ALL REPAIR PARTS BS500A TO BS500I; RBL24.5; WL156 PER SRM 53-00-53-2R-5 STEP 4. K. AND EA M-22-153-01550. INSTALLED FCB R/H FLOOR TO SIDEWALL SUPPORT AND ALL REPAIR PARTS BS500A TO BS500I; RBL24.5; WL156 PER SRM 53-00-53-2R-5 STEP 4. L THRU N.; DWG 143A7500 AND EA M-22-153-01550.;[14] 'THE DAMAGE WAS REPAIRED PER SRM 53-00-53-2R-5 (REPAIR 5) AND EA M-22-153-01550'.CARD COMPLETE.

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