Service difficulty report · Support · Boeing 7378H4

Difficulty date
February 16, 2023
Submitted
March 20, 2023
Operation
Air carrier
Aircraft
N8528Q
Make and model
Boeing 7378H4
Aircraft serial
36927
Aircraft time
19,732 hours, 9,567 cycles
Part
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 ON FORWARD CARGO BAY R/H FLOOR TO SIDEWALL SUPPORT BS 500A+12 TO 500H+2 RBL 23 WL 156<[01] EVALUATED CORROSION AT ALL LOCATIONS OF FLOOR TO SIDEWALL SUPPORT; FOUND DEEPEST LOCATION TO BE AT BS 500E+10 RBL 23 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 08/2023;[02] VERIFIED CORRECTIVE ACTION 1 AND MEASUREMENT TABLE.;[03] REMOVED DAMAGED FCB R/H FLOOR TO SIDEWALL SUPPORT BS500A TO BS500I; RBL23; WL156 PER SRM 53-00-53-2R-5 STEP 4. B. & C. AND EA M-22-153-01550.;[04] FABRICATED FCB R/H FLOOR TO SIDEWALL SUPPORT; ALL REPAIR PARTS; SPLICE AND QTY (2) TAPERED FILLERS. ALL FROM BAC1496-444#7075T62 EXT. CLAD LOT#1515896-1. SPLICE LOCATED AT BS500B+12; RBL23; WL156. PER SRM 53-00-53-2R-5 STEP 4. D. THRU G. AND EA M-22-153-01550.;[05] DEBURRED AND APPLIED CHEMICAL CONVERSION COATING TO FABRICATED FCB R/H FLOOR TO SIDEWALL SUPPORT AND ALL REPAIR PARTS BS500A TO BS500I; RBL23; WL156 PER SRM 53-00-53-2R-5 APPLIED PRIMER TO FCB R/H FLOOR TO SIDEWALL SUPPORT AND ALL REPAIR PARTS BS500A TO BS500I; RBL232; WL156 PER SRM 53-00-53-2R-5 STEP 4. J. AND EA M-22-153-01550.COMPLETED INSTALLATION OF FCB R/H FLOOR TO SIDEWALL SUPPORT AND ALL REPAIR PARTS BS500A TO BS500I; RBL23; WL156 PER SRM 53-00-53-2R-5 STEP 4. K. THRU N.; AND 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'

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