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 521DB HAS DISBONDED CORNERS / [01] IDENTIFIED PANEL IAW SRM 57-41-01-0I-4 FIGURE 5 ITEM [2]. DAMAGE IS BEYOND ALLOWABLE LIMITS IAW SRM 57-41-1A-1 PARAGRAPH 4.A.(5).(A) AND WILL BE REPAIRED IAW SRM 51-70-05-2R-6 PER SRM 57-41-01-2R-1 PARAGRAPH 2.F. REMOVED 1 EA BACKUP PLATE IAW SRM 51-40-02-0G-0 PARAGRAPH 4.E. REMOVED INNER FOIL PLY IAW SRM 51-70-14-2R-3 PARAGRAPH 4.A(1-2). REMOVED INNER SURFACE EDGEBAND PLY DAMAGE FROM THE THREE INBOARD MOST LEADING EDGE CORNERS; THE LARGEST AREA OF DAMAGE REMOVED WAS 0.75'X0.25'; TAPERS AND ALL AREAS AND CLEANED ALL AREAS; WORK PERFORMED IAW SRM 51-70-05-2R-6 PARAGRAPH 4.A-D.;[04] FABRICATED REPAIR PLIES FROM BMS5-129 GRADE 05 LOT NUMBER 1488462-1; BMS8-79 STYLE 1581 LOT NUMBER 1486928-1 AND BMS8-79 STYLE 120 LOT NUMBER 1488453-1; INSTALLED PLIES; VERIFIED 5X5 AND SET PLIES TO CURE USING HOTBONDER ID: ATS883 DUE: 10/2022; WORK PERFORMED IAW SRM 51-70-05-2R-6 PARAGRAPH 4.E-G.[08] FABRICATED REPAIR FOIL FORM BMS8-289 LOT NUMBER 1484605-1; INSTALLED FOIL WITH BMS5-128 LOT NUMBER JH1LAA7523; VACUUM BAGGED REPAIR; VERIFIED SATISFACTORY 5X5 USING VACUUM GAUGE ID: ATS2438 DUE: 03/2023; CURED REPAIR UNDER HEAT LAMP USING THERMOMETER ID: ATS2209 DUE: 10/2022; TO VERIFY TEMPERATURE; UNBAGGED FOIL; TRIMMED EDGES; AND REFINISHED PANEL'S TOOLSIDE IAW SRM 51-70-14-2R-3 PARAGRAPH 4.A.(3-4).(5).(A) AND (11). INSTALLED REMOVED BACK-UP PLATES IAW SRM 51-40-02-0G-0 PARAGRAPH 4.A-C AND 10; ALSO IAW DRAWING 116A9110 SHEET 14.;

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