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
R/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

R/W L/E PANEL 621DB CORNERS ARE DISBONDED / [01] REMOVED 2EA. BACKUP PLATES ACCORDING TO SRM 51-40-02; PARA. 4.E.<BR><BR>REMOVED UPPER SURFACE BONDED ALUMINUM FOIL TO FACILITATE EVALUATION ACCORDING TO SRM 51-70-14-2R-3; PARA. 4.A.(2).(B).;[02] REMOVED LOWER SURFACE FINISHES TO FACILITATE EVALUATION ACCORDING TO AMM 51-21-99-300-802; PARA. 3.C.(3).(A) THRU (D).;[03] IDENTIFIED PANEL 621DB MATERIAL ACCORDING TO SRM 57-41-01-0I-4; FIG. 5; TABLE 5; ITEM 2; AND FIG. 19; TABLE 16.<BR><BR>FOUND DAMAGE TO BE OUT OF ALLOWABLE LIMITS IAW SRM 57-41-01-1A-1; PARA'S 2.B AND 4.A.(5) & (6); AND FIG. 106.<BR><BR>AREAS TO BE REPAIRED ACCORDING TO SRM 51-70-05-2R-6; AS REQUIRED BY SRM 57-41-01-2R-1; PARA'S 2; 4.B; AND TABLE 202.<BR><BR>REMOVED ERODED PLIES TO A REGULAR SHAPE IN TWO AREAS; TAP TESTED AREAS (NO DISBONDS NOTED); REMOVED CONTAMINANTS FROM REPAIR AREAS; ALL ACCORDING TO SRM 51-70-05-2R-6; PARA'S 4.A THRU 4.D.;[[11] FABRICATED FOIL REPAIR PLY FROM BMS8-289 LOT#1484605-1; INSTALLED FOIL USING BMS5-128 LOT#JH1LAA7523. VACUUM BAGGED; LEAK CHECKED GOOD USING VACUUM GAUGE ID:ATS2107 CAL DUE:09/2022. IAW SRM 51-70-14-2R-3 PAR.4 A(3-5A;11A-J);14] INSTALLED (2EA) BACK-UP PLATES IAW SRM 51-40-02-0G-0 PAR.4 B-C & BOEING DWG 116A9110-3<BR><BR>APPLIED; CURED; AND TESTED CONDUCTIVE COATING LOT#S22B211; RESISTIVITY CHECKED GOOD USING MULTIMETER ID:ATS1658 CAL DUE:03/2023 IAW AMM 51-21-71-370-801 PAR.3 D(1-4;7A);

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