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 621QB HAS DISBONDED CORNER / [01] REMOVED 1EA. BACKUP PLATE 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] IDENTIFIED PANEL 621QB MATERIAL ACCORDING TO SRM 57-41-01-0I-4; FIG. 3; TABLE 3; ITEM 2; AND FIG. 11; TABLE 10 .<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>STRIPPED LOWER SURFACE PAINTS/PRIMERS; REMOVED ERODED PLIES TO A REGULAR SHAPE IN TWO AREAS; TAP TESTED AREAS (NO DISBONDS NOTED); REMOVED CONTAMINANTS FROM REPAIR AREA; ALL ACCORDING TO SRM 51-70-05-2R-6; PARA'S 4.A THRU 4.D.;[05] FABRICATED REPAIR PLIES USING BMS5-129TY2 GR05 LOT#1488462-1; BMS8-79CL3ST1581 LOT#1491918-1; AND BMS8-79CL3ST120 LOT#1493862-1 IAW SRM 51-70-05-2R-6 PAR.4 E;[06] INSTALLED REPAIR PLIES; VACUUM BAGGED; LEAK CHECK GOOD AND SET TO CURE USING HOTBONDER ID:ATS883 CAL DUE 10/2022 IAW SRM 51-70-05-2R-6 PARA 4E-G.;[10] 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);

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