Service difficulty report · Scuff Plate · Boeing 7377H4

Difficulty date
September 28, 2023
Submitted
October 19, 2023
Operation
Air carrier
Aircraft
N409WN
Make and model
Boeing 7377H4
Aircraft serial
27896
Aircraft time
72,749 hours, 43,518 cycles
Part
Scuff Plate
Part number
UNKNOWN
Condition
Cracked
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

AFT CARGO BAY AFT CORNER SCUFF PLATE CRACKED<[01] WELDED CORNER SCUFF PLATE USING ER4043 FILLER ROD LOT NUMBER 1131216 PER SRM 53-60-15-2R-1 PARAGRAPH 4.B. (4) AND BAC 5975<BR>EQUIPMENT USED; WELDING MACHINE E10583 CALIBRATION DUE DATE 01/2024<BR><BR>SANDED THE REWORKED SURFACES AND EDGES OF CORNER SCUFF PLATE AS NECESSARY TO GET SURFACE ROUGHNESS OF 125RA OR SMOOTHER PER SRM 53-60-15-2R-1 REPAIR 1 PARAGRAPH 4.B. (5) AND 51-20-13<BR><BR>APPLIED A CHEMICAL CONVERSION COATING TO THE BARE ALUMINUM SURFACES PER SOPM 20-43-03;TYPE 2 CLASS A OR C AND SRM 53-60-15-2R-1 REPAIR 1 PARAGRAPH 4.B. (6)<BR><BR>APPLIED TWO LAYERS OF BMS 10-11; TYPE 1 PRIMER TO THE INNER SURFACES OF THE CORNER SCUFF PLATE PER SRM 53-60-15-2R-1 REPAIR 1 PARAGRAPH 4.B. (7) AND SOPM 20-41-02;[02] VERIFIED CORRECTIVE ACTION 1<BR>VERIFIED MEASUREMENTS.<BR>JOB COMPLETE

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