Service difficulty report · Panel · Boeing 7377Q8

Difficulty date
June 6, 2022
Submitted
June 30, 2022
Operation
Air carrier
Aircraft
N7850B
Make and model
Boeing 7377Q8
Aircraft serial
28238
Aircraft time
59,194 hours, 39,098 cycles
Part
Panel
Condition
Debonded
Location
L/H 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 521TB DISBONDED ON CORNER / [01] IDENTIFIED LEADING EDGE PANEL 521TB MATERIAL IAW SRM 57-41-01-OI-4; FIGURE 3; ITEM 1; TABLE 3. FOUND DAMAGED PANEL NOT TO BE WITHIN ALLOWABLE LIMITS IAW SRM 57-41-01-1A-1 TABLE 101. PARA 4.A.5. AND WILL REPAIRED IAW SRM 57-41-01-2R-1 PARA 4.E AND SRM 51-70-05-2R-6. REMOVED 2EA BACKUP PLATE TO FACILITATE REPAIR IAW SRM 51-40-02-OG-0 PARA 4.E.<BR>STARTED REMOVING ALUMINUM FOIL TO FACILITATE REPAIR IAW SRM 51-70-14-2R-3 PARA 4.A.(2).E.;[02] VALIDATED APPLICABILITY OF SRM 51-70-05-2R-6.;[03] COMPLETED REMOVING ENTIRE ALUMINUM FOIL TO FACILITATE REPAIR IAW SRM 51-70-14-2R-3 PARA 4.A.(2).E.;[04] REMOVED DAMAGED PLIES AND CLEANED REPAIR AREA IAW SRM 51-70-05-2R-6 PARA 4.A-D.;[05] VERIFIED CORRECTIVE ACTION ENTRY 4.;[06] VERIFIED CORRECTIVE ACTIONS 1-3;[07] FABRICATED AND INSTALLED REPAIR PLIES USING REPAIR FABRIC BMS 8-79 ST 120 LOT#1488453-1; BMS 8-79 ST 1581 LOT#1486928-1 AND ADHESIVE FILM BMS 5-129 GR 05 LOT#1491228-1. ALL IAW SRM 51-70-05-2R-6 PARA 4. E.;[11] FABRICATED ALUMINUM FOIL USING BMS 8-289 LOT#1484605-1 INSTALLED USING BMS 5-128 LOT#JH1LAA7523 VACUUM BAGGED; LEAK CHECK GOOD USING VACUUM GAUGE ID: ATS2107 DUE: 09/2022 IAW SRM 51-70-14-2R-3 PARA 4.A.3-7;11(A-J).;

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