Service difficulty report · Support Plate · Boeing 7377H4

Difficulty date
December 7, 2023
Submitted
January 16, 2024
Operation
Air carrier
Aircraft
N455WN
Make and model
Boeing 7377H4
Aircraft serial
32462
Aircraft time
64,648 hours, 38,599 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 L/H FLOOR TO SIDEWALL SUPPORT PLATE MULTIPLE AREAS AROUND NUT PLATE HOLES BS727B TO BS767 LBL22 WL156<[01] EVALUATED CORROSION AT ALL LOCATIONS; FOUND DEEPEST LOCATION TO BE AT BS 747+12' REMOVED 0.015' IN AN AREA OF 1'X1' ORIGINAL THICKNESS 0.040' FOUND TO BE OUT OF LIMITS PER SRM 53-00-53-1A-2 USING ATS TOOL ID ATS2677 DUE 05/2024. PART WILL BE REPLACED AS PER SRM 51-10-02-0G-0. REMOVED AND REPLACED AFT CARGO BAY L/H FLOOR TO SIDE SUPPORT PLATE BS 727+4 TO BS 847 LBL 22 WL 156 IAW SRM 51-40-02-0G-0; DWG 146A7500 AND DWG 146A0061;[02] VERIFIED COMPLETE. <BR>VERIFIED MEASUREMENTS.

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