Service difficulty report · Plate · Boeing 7378H4

Difficulty date
January 9, 2023
Submitted
February 2, 2023
Operation
Air carrier
Aircraft
N8519R
Make and model
Boeing 7378H4
Aircraft serial
36910
Aircraft time
20,262 hours, 9,764 cycles
Part
Plate
Part number
NOTENTERED
Part serial
NOTENTERED
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 L/H FLOOR TO SIDEWALL SUPPORT PLATE MULTIPLE AREAS AROUND NUT PLATE HOLES BS500E TO BS500I LBL24.5 WL156<EVALUATED CORROSION AT ALL LOCATIONS; FOUND DEEPEST LOCATION TO BE AT BS 500G+10 LBL 24.5 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 2473 DUE 2023CUT AND REMOVED DAMAGED SECTION OF FCB L/H FLOOR TO SIDEWALL SUPPORT PLATE BS500D+12 TO BS500I; LBL24.5; WL156 PER SRM 53-00-53-2R-5 STEP 4. B. AND EA M-22-153-01550.;[05] FABRICATED FCB L/H FLOOR TO SIDEWALL SUPPORT; SPLICE PLATE AND (2) QTY TAPERED SHIMS ALL FROM BAC1496-444#7075T62 EXT. CLAD LOT#509343-1 BS500D+12 TO BS500I; LBL24.5; WL156 PER DWG 143A7500; SRM 53-00-53-2R-5 STEP 4. D. THRU I; AND EA M-22-153-01550. SPLICE LOCATED AT BS500S+12; LBL24.5; WL15 APPLIED PRIMER TO FCB L/H FLOOR TO SIDEWALL SUPPORT; SPLICE PLATE AND TAPERED SHIMS BS500D+12 TO BS500I; LBL24.5; WL156 PER SRM 53-00-53-2R-5 STEP 4. J. AND EA M-22-153-01550.; INSTALLED FABRICATED L/H FLOOR TO SIDEWALL SUPPORT AND ALL REPAIR PARTS BS500D+12 TO BS500I; LBL24.5; WL156 PER DWG 143A7500; SRM 53-00-53-2R-5 STEP 4. J. THRU M. AND EA M-22-153-01550.;[12] APPLIED CIC TO FABRICATED L/H FLOOR TO SIDEWALL SUPPORT AND ALL REPAIR PARTS BS500D+12 TO BS500I; LBL24.5; WL156 PER SRM 53-00-53-2R-5 STEP 4. J. THRU M. AND EA M-22-153-01550.;[13] 'THE DAMAGE WAS REPAIRED PER SRM 53-00-53-2R-5 (REPAIR 5) AND EA M-22-153-01550'.;

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