Service difficulty report · Skin · Boeing 7377H4

Difficulty date
January 31, 2023
Submitted
March 2, 2023
Operation
Air carrier
Aircraft
N404WN
Make and model
Boeing 7377H4
Aircraft serial
27892
Aircraft time
72,784 hours, 43,149 cycles
Part
Skin
Condition
Cracked
Location
Zn 600 Right Win
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

#7 LEADING EDGE SLAT LOWER SKIN AT ACTUATOR ATTACH POINTS HAVE CRACKED SKIN BELOW RIVET.<[01] ACCOMPLISHED HFEC SURFACE SCAN IAW 737 NDTM PART 6 CHAPTER 51-00-00 PROCEDURE 23.<BR>2EA CRACKS NOTED AROUND RIVET HOLE; DIMENSIONS OF CRACKS 0.2' X 0.1' AND 0.1' X 0.1' MARKED.<BR><BR>ACCOMPLISHED HFEC OPEN HOLE INSPECTION IAW 737 NDTM PART 6 CHAPTER 51-00-00 PROCEDURE 16. NO CRACKS NOTED.<BR><BR>ACCOMPLIS[10] FABRICATED REPAIR DOUBLER -1 FROM 0.071'; 7075-T6-C; LOT#1478276-1; REPAIR FILLER-2; FROM 0.063'. 7075-T6-C; LOT#1498631-1; IAW SRM 57-42-01-2R-8; OK TO APPLY CHEMICAL CONVERSION AND PRIMER;[18] INSTALLED REPAIR PARTS AT #7 LEADING EDGE SLAT LOWER SKIN IAW SRM 57-42-01-2R-8;[25] REPAIRED THE #7 SLAT LOWER LE SKIN AT THE ACTUATOR ATTACH FITTING IAW SRM 57-42-01-2R-8 AND SOPM 20-50-01.;.

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