Service difficulty report · Skin · Boeing 7377H4

Difficulty date
February 2, 2023
Submitted
March 6, 2023
Operation
Air carrier
Aircraft
N955WN
Make and model
Boeing 7377H4
Aircraft serial
36671
Aircraft time
38,739 hours, 23,607 cycles
Part
Skin
Condition
Delaminated
Location
Zn 500 Left Wing
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

L/W O/B AFT FLAP LOWER SURFACE SKIN DELAMINATED 25' FROM O/B END<[01] IDENTIFIED L/W O/B AFT FLAP IAW SRM 57-53-01-0I-4 FIGURE 2 TABLE 2 ITEM 5 <BR><BR>DAMAGE EXCEEDS ALLOWABLE DAMAGE LIMITS IAW SRM 57-53-01-1A-5 PAR.4 A(3)<BR><BR>DAMAGE TO BE REPAIRED IAW SRM 57-53-01-2R-14.<BR><BR>REMOVED DAMAGE TO THE LOWER SURFACE SKIN MEASURING 2'X0.5'; WITH NO DAMAGE NOTED TO THE HONEYCOMB CORE OR TRAILING EDGE FILLER IAW SRM 57-53-01-2R-14 PAR.4 B & SRM 51-70-10-2R-0 PAR.6-7;[02] VALIDATED APPLICABILITY OF DAMAGE TO BE REPAIRED IAW SRM 57-53-01-2R-14 AND SRM 51-70-10-2R-4.;[03] VERIFIED CORRECTIVE ACTION ITEM 1-2.;[04] FABRICATED LOWER SKIN T/E FILLER AND REPAIR DOUBLER USING 7075-T6 0.020: LOT#1470922-1 IAW SRM 57-53-01-2R-14 PAR.4 C-D & SRM 51-70-10-0G-0 PAR.8 A<BR><BR>COMPLETED SURFACE PREP OF TRAILING EDGE FILLER LOWER SURFACE USING BOEGEL PROCEDURE (AC-130-2 LOT #2122E); AND APPLIED & CURED BONDING PRIMER (BMS 5-89 TYII LOT #1513769-1) IAW SRM 51-70-10-0G-0 PARA 14 & 15.;[05] INSTALLED LOWER SKIN FILLER & REPAIR DOUBLER USING ADHESIVE EA9696 LOT#1515859-1; AND BMS5-121 POSITIONING FABRIC;8[09] L/W O/B AFT FLAP LOWER SURFACE DELAMINATION WAS REPAIRED IAW SRM 57-53-01-2R-14 & SRM 51-70-10-2R-4;[10] FINAL INSPECTION. JOB COMLETE.<BR><BR>VERIFIED MEASUREMENTS TABLE.

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