Service difficulty report · Support Plate · Boeing 7378H4

Difficulty date
March 22, 2022
Submitted
April 20, 2022
Operation
Air carrier
Aircraft
N8628A
Make and model
Boeing 7378H4
Aircraft serial
42384
Aircraft time
27,196 hours, 12,448 cycles
Part
Support Plate
Part number
146A750231
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 L/H FLOOR TO SIDEWALL SUPPORT PLATE HAS AREAS OF CORROSION BS727G+13 TO BS807 LBL21 WL 156 / [01] EVALUATED CORROSION AT ALL LOCATIONS; FOUND DEEPEST LOCATION TO BE AT BS 747+10 LBL 21 WL 156; FOUND 0.015 REMOVED FROM ORIG 0.040 IN NUMEROUS 1'X1' AREAS; FOUND TO BE OUT OF LIMITS PER SRM 53-00-53-1A-2 USING DIAL DEPTH GAUGE ATS 1225;[02] VERIFIED CORRECTIVE ACTION 1.;[03] FABRICATED REPAIR PARTS FOR ACB LH FLOOR TO SIDEWALL SUPPORT; BS727G+10 TO 807+10; IAW SRM 53-00-53-2R-5; DWG 146A7500. MATERIAL BAC1496-377#7075T62. LOT#1484618-1. IAW SRM53-60-53-01-2. APPLIED CHEMICAL CONVERSION COATING IAW; SRM 51-20-01-0G-0. AND OK TO PRIME REPAIR PARTS. SPLICES 727G+10; AND 807+10.;[04] VERIFIED CORRECTIVE ACTION 3.<BR><BR>OK TO PRIMER REPAIR PARTS.;[05] PRIMED AND ASSEMBLED REPAIR PARTS FOR ACB LH FLOOR TO SIDEWALL SUPPORT; BS272G TO 807+10 LBL21. IAW SRM 53-00-53-2R-5.;[06] OK TO INSTALL REPAIR PARTS @ BS727G+10 TO 807+10 LBL21 WL 156.;[07] VERIFIED CORRECTIVE ACTIONS 5 AND 6.;[08] INSTALLED REPAIR PARTS @ BS 727G+ TO 807+10 LBL21 WL156 IAW SRM 53-00-53-2R-5.;[09] LOCATION CORRECTION 727G+10;[10] VERIFIED CORRECTIVE ACTIONS 8 AND 9.

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