Service difficulty report · Panel · Boeing 7377H4

Difficulty date
February 3, 2023
Submitted
March 2, 2023
Operation
Air carrier
Aircraft
N404WN
Make and model
Boeing 7377H4
Aircraft serial
27892
Aircraft time
72,784 hours, 43,149 cycles
Part
Panel
Condition
Debonded
Location
Zn 100 Fus Lower
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

PANEL 521CB IS DISBONDED AT CORNER<[01] IDENTIFIED PANEL 521QB MATERIAL IAW SRM 57-41-01-0I-4; FIGURE 5; TABLE 5; ITEM [3]. <BR>CLEANED PANEL AND REMOVED FINISH AS NEEDED TO EVALUATE DAMAGE IAW AMM 51-21-11-150-815 PARA. 17. C. AND D. <BR><BR>VISUAL INSPECTION FOUND DAMAGE TO GLASS FIBER PLIES TO BE OUT OF ALLOWABLE LIMITS IAW SRM 57-41-01-1A-1 PARA 4.A.(5). <BR><BR>DAMAGE WILL BE REPAIRED IAW SRM 51-70-05-2R-6 AS GIVEN IAW SRM 57-41-01-2R-1 PARA 4. B. (2). AND TABLE 202. <BR><BR>REMOVED (2 EA.) BACKPLATES TO FACILITATE REPAIR IAW SRM 51-40-02-0G-0 PARA 4.E. <BR><BR><BR>REMOVED INNER SURFACE ALUMINUM FOIL TO FACILITATE REPAIR IAW SRM 51-70-14-2R-3 PARA 4. A. (1) - (2).[06] FABRICATED AND INSTALLED REPAIR PLIES USING BMS 8-79 ST 120 LOT# 1512713-2; BMS 8-79 ST1581 LOT# 1510611-1; AND BMS 5-129 GR05 LOT# 1515859-1; VACUUM BAGGED REPAIRS; LEAK CHECKED GOOD USING VACUUM GAUGE ID ATS2798 CAL DUE: 10/2023; SET REPAIR TO CURE USING HOT BOND MACHINE ID: ATS532 CAL DUE 06/2023 IAW SRM 51-70-05-2R-6 PAR. 4.D-G.[11] FABRICATED AND INSTALLED REPAIR PLY OF BONDED ALUMINUM FOIL BMS 8-289 LOT: 1507307-1 USING ADHESIVE BMS 5-128 LOT: JH2FAL7046<BR>ASSEMBLED VACUUM BAG AND PERFORMED 5X5 TEST USING VACUUM GAUGE ATS2798 DUE: 10/2023. PASSED LEAK TEST.<BR>CURED ADHESIVE USING THERMOMETER ATS2208 DUE: 10/2023<BR>REMOVED VACUUM BAG AND TRIMMED EDGES FROM EXCESSIVE MATERIAL. IAW SRM 51-70-14-2R-3 PARA 4.A.(3-5; 11)(A-L)

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