Service difficulty report · Panel · Boeing 7377H4

Difficulty date
July 20, 2022
Submitted
August 23, 2022
Operation
Air carrier
Aircraft
N490WN
Make and model
Boeing 7377H4
Aircraft serial
32476
Aircraft time
59,880 hours, 35,571 cycles
Part
Panel
Part number
621NB
Condition
Delaminated
Location
Rh 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

RT WING L/E PANEL 621NB HAS DELAMINATION AT BOTH L/E CORNERS / REMOVED DAMAGE FROM BOTH SIDES OF PANEL MEASURING 5.5'X2.4; 4.5'X4.5'; 4'X2'; AND 4.5X2'; RE-CLEANED; WITH NO CONTAMINATION NOTED IAW SRM 51-70-05-2R-6 PAR.4 A-D;[02] VALIDATED APPLICABILITY OF REPAIR TO BE COMPLETED IAW SRM 51-70-05-2R-6. FABRICATED REPAIR PLIES USING BMS5-129TY2 GR05 LOT#1497185-1; BMS8-79CL3ST1581 LOT#1490485-1; AND BMS8-79CL3ST120 LOT#1493863-1 IAW SRM 51-70-05-2R-6 PAR.4 E; INSTALLED REPAIR PLIES AND VACUUM BAGGED IAW SRM 51-70-05-2R-6 PARA 4.E&F.CURED REPAIR PLIES USING HOT BONDER ID:ATS532 DUE:06/2023; REMOVED VACUUM BAG MATERIALS; LIGHTLY SANDED FLUSH; AND CLEANED AREA OF REPAIR IAW SRM 51-70-05-2R-6 PAR.4 F-G;[08] VERIFIED CORRECTIVE ACTIONS 4-7FABRICATED ALUMINUM FOIL PLY USING BMS 8-289 LOT#1484605-1 INSTALLED AND CURED USING BMS 5-128 LOT#JH1LAR7523. VACUUM BAGGED; LEAK CHECK GOOD USING VACUUM GAUGE ID:E11543 DUE:09/2022 AND THERMOMETER ID:ATS2208 DUE:10/2022 IAW SRM 51-70-14-2R-3 PARA 4.A.3-7 & 11 (A-J).;[12] UNBAGGED ALUMINUM FOIL REPAIR; AND TRIMMED EXCESS MATERIAL IAW SRM 51-70-14-2R-3 PAR.4 A(11)(L)APPLIED FINAL FINISH IAW AMM 51-21-71-370-801 PAR.3 D(1-4;7A); AMM 51-21-99-300-802 PAR.3 C(1); AND SRM 51-70-05-2R-6 PAR.4 RT WING L/E PANEL 621NB WITH DELAMINATION AT BOTH L/E CORNERS HAS BEEN REPAIRED IAW SRM 51-70-05-2R-6

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