Service difficulty report · Panel · Boeing 7377Q8

Difficulty date
May 8, 2022
Submitted
June 8, 2022
Operation
Air carrier
Aircraft
N7875A
Make and model
Boeing 7377Q8
Aircraft serial
29354
Aircraft time
50,797 hours, 27,672 cycles
Part
Panel
Condition
Delaminated
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 621CB DELAM ON L/E OF PANEL / [01] REMOVED 2EA. BACKUP PLATES ACCORDING TO SRM 51-40-02; PARA. 4.E02] IDENTIFIED PANEL 621CB MATERIAL ACCORDING TO SRM 57-41-01-0I-4; FIG. 5; TABLE 5; ITEM 3; AND FIG. 20; TABLE 17.<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 DELAMINATED PLIES TO A REGULAR SHAPE AT THE I/B FWD CORNER (PLUS 11 ADDITIONAL FASTENER HOLES); TAP TESTED AREAS (NO DISBONDS NOTED); TAPER SANDED AREAS; REMOVED CONTAMINANTS FROM REPAIR AREA; ALL ACCORDING TO SRM 51-70-05-2R-6; PARA'S 4.A THRU 4.D.; AND SRM 51-70-14-2R-3. PARA. 4.A.(2).(B).;[05] CLEANED REPAIR AREAS; APPLIED REPAIR PLIES FABRICATED FROM BMS 8-139; ST 1581 FIBERGLASS (LOT# 1492620-1) AND BMS 5-154; TY2; GR5 ADHESIVE (LOT# 1483752-1); THEN VACUUM BAGGED REPAIR AREA FOR OVEN CURE; ACCOMPLISHED VACUUM BLEED DOWN TEST (PASS); ALL ACCORDING TO SRM 51-70-05-2R-6; PARA'S 4.E AND 4.F.;[10] FABRICATED ALUMINUM FOIL REPAIR PLY FROM BMS8-289 LOT#1484605-1; INSTALLED USING BMS8-301CL1 (EA9390) LOT#JH1GAA7833. FABRICATED EXPANDED ALUMINUM FOIL MESH REPAIR PLY USING BMS 8-336 LOT#1360513-1

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