Service difficulty report · Support Plate · Boeing 7378H4

Difficulty date
November 2, 2023
Submitted
December 5, 2023
Operation
Air carrier
Aircraft
N8554X
Make and model
Boeing 7378H4
Aircraft serial
36993
Aircraft time
19,892 hours, 9,901 cycles
Part
Support Plate
Part number
UNKNOWN
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 BS727E+19' TO BS767 RBL22 WL156<[01] VERIFIED STEPS 1;2 COMPLETE AND MEASUREMENT TABLE.;[02] VERIFIED STEPS 1-6;[03] MADE CORRECTIONS AND CHANGED STEP STATUS TO PARTIAL ON STEPS 4 AND 6;[04] CERTIFIED;[05] CORROSION DAMAGE ON ACB R/H FLOOR TO SIDEWALL SUPPORT BS727E+19 TO BS767; RBL22; WL156 WAS FOUND TO BE OUT OF LIMITS PER SRM 53-00-53-1A-2. CUT AND REMOVED DAMAGED SECTION OF FLOOR TO SIDEWALL SUPPORT BS727+12 TO BS767; RBL22; WL156 PER SRM 53-00-53-2R-5. LOCATED; DRILLED AND INSTALLED REPLACEMENT FLOOR TO ACB R/H FLOOR TO SIDEWALL SUPPORT AND ALL REPAIR PARTS COMPLETE PER SRM 53-00-53-2R-5.;[06] VERIFIED COMPLETION OF CORRECTIVE ACTIONS 5 AND MEASUREMENT TABLE.

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