Service difficulty report · Panel · Boeing 7377H4

Difficulty date
June 16, 2023
Submitted
July 17, 2023
Operation
Air carrier
Aircraft
N417WN
Make and model
Boeing 7377H4
Aircraft serial
29822
Aircraft time
71,145 hours, 42,399 cycles
Part
Panel
Part number
UNKNOWN
Condition
Pulled
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 L/E PANEL 521MB HAS PULLED FASTENER HOLES (MARKED)<[01] IDENTIFIED PANEL 521MB IAW SRM 57-41-01-0I-4 FIGURE 4 ITEM [1]; DAMAGE TO THE PANEL IS BEYOND THE ALLOWABLE LIMITS IAW SRM 57-41-01-1A-1 PARAGRAPH 4.A.(4).(C) AND WILL BE REPAIRED IAW SRM 51-70-04-2R-9 PER SRM 57-41-01-2R-1 PARAGRAPH 2.F. REMOVED THE PANEL'S TWO BACK-UP PLATES IAW SRM 51-40-02-0G-0 PARAGRAPH 4.E. REMOVED THE INNER FOIL PLY IAW SRM 51-70-14-2R-3 PARAGRAPH 4.A.(1-2). PREPPED THREE DISCREPANT HOLES ON THE PANEL FOR THE REPAIR IAW SRM 51-70-04-2R-9 PARAGRAPH 4.A-C.[06] FABRICATED AND INSTALLED ALUMINUM FOIL REPAIR USING FOIL BMS 8-289 LOT# 1511320-1 AND RESIN BMS 5-128; EA-956; LOT# 1528280-3. VACUUM BAGGED REPAIR; CHECKED VACUUM BAG FOR LEAKS; VACUUM BAG CHECKED GOOD USING VACUUM GAUGE ID: ATS2441; CAL DUE DATE: 08/2023 AND SET REPAIR TO CURE USING HOT BONDER MACHINE ID: NCX000526; CAL DUE DATE: 11/2023.<BR>WORK ACCOMPLISHED IAW SRM 51-70-14-2R-3 PAR 4.A (3)-(5); (11) (A)-(K).;[07] CURED ALUMINUM FOIL REPAIR; REMOVED VACUUM BAGGING MATERIALS AND TRIMMED EXCESS FOIL FROM EDGES OF PANEL IAW SRM 51-70-14-2R-3 PAR 4.A (11) (K)-(L).;[08] VERIFIED CORRECTIVE ACTION ITEM 6 AND 7.;[09] REQUESTING POST CURE NDI OF REPAIR IAW SRM 51-70-04-2R-9 PAR. 4.O.;[10] POST CURE NDI OF REPAIR WAS ACCOMPLISHED ON CORRECTIVE ACTION 5 OF THIS FAULT.;

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