Service difficulty report · Floor Support · Boeing 7377H4

Difficulty date
May 12, 2023
Submitted
June 20, 2023
Operation
Air carrier
Aircraft
N429WN
Make and model
Boeing 7377H4
Aircraft serial
33658
Aircraft time
66,602 hours, 39,316 cycles
Part
Floor Support
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

FORWARD CARGO COMPARTMENT - MULTIPLE AREA OF CORROSION ON MIDDLE FLOOR SUPPORT BS 500C+18.25 RBL 14; RBL 20. (MARKED)<[01] REMOVED CORROSION ON MIDDLE FLOOR SUPPORT BS 500C+18.25 RBL 14; RBL 20. PER REF SRM 53-30-08-1A-1 L=1;W=1<BR><BR>BLEND OUT EVALUATION ORIGINAL MATERIAL IS .071'' REMAINING THICKNESS IS .040'' .THEREFORE FOUND TO BE OUT OF LIMITS PER REF SRM 53-30-08-1A-1;[02] RECEIVED NEW ON FORWARD CARGO COMPARTMENT MIDDLE FLOOR SUPPORT BS 500C+18.25 RBL 23 TO LBL 23 P/N 143A9485-35 PO#920984. LOCATED AND DRILLED IAW SRM51-40-05 AND DWG143A9481;[03] SRM 53-30-08-0I-1 IDENTIFICATION AND SRM 53-30-08-1A-1 ALLOWABLE DAMAGE ARE APPLICABLE;[04] VERIFIED CORRECTIVE ACTION 1; 2 AND 3 AS WELL AS VERIFIED THE MEASUREMENT TABLE.

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