Service difficulty report · Panel · Boeing 7377H4

Difficulty date
February 17, 2023
Submitted
March 13, 2023
Operation
Air carrier
Aircraft
N289CT
Make and model
Boeing 7377H4
Aircraft serial
36633
Aircraft time
50,940 hours, 30,659 cycles
Part
Panel
Condition
Cracked
Location
Zn 500 Left 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

LT WING L/E PANEL 521ZB O/B FWD CORNER IS CRACKED<[01] IDENTIFIED PANEL 521ZB MATERIAL IAW SRM 57-41-01-0I-4; FIGURE 2; SHEET1; TABLE 2; ITEM [1]. <BR><BR>CLEANED PANEL AND REMOVED FINISH ON TOOL SIDE TO EVALUATE DAMAGE IAW AMM 51-21-11-150-815 PARA. 17. C. AND D<BR><BR>VISUAL INSPECTION FOUND DAMAGE AT O/B FWD CORNER AND ADDITIONAL DAMAGE AT I/B FWD CORNER TO BE OUT OF ALLOWABLE LIMITS IAW SRM 57-41-01-1A-1 PARA 4. A. (5) (A). <BR><BR>REMOVED (2 EA.) BACK-UP PLATES TO FACILITATE REPAIR IAW SRM 51-40-02-0G-0 PARA 4.E. FIG 8. <BR><BR>REMOVED BONDED ALUMINUM FOIL TO FACILITATE REPAIR IAW SRM 51-70-14-2R-3 PARA 4.A.(1).-(2). AS GIVEN IN SRM 57-41-01-2R-1 PARA 2.E.(2). <BR><BR>DAMAGE WILL BE REPAIRED PER SRM 51-70-05-2R-6 AS DIRECTED PER SRM 57-41-01-2R-1 PARA 4.E.;[09] FABRICATED REPAIR FOIL USING BMS8-289 LOT# 1507307-1; AND INSTALLED USING BMS5-128 (EA-956) ADHESIVE LOT# JH2FAL7046; VACUUM BAGGED REPAIR; WITH COMPLETED SUCCESSFUL BLEED DOWN TEST USING GAUGE ID: ATS2798 CAL/DUE: 10/2023; AND CURED UNDER HEATLAMP MONITORED USING THERMOMETER ID: ATS2209 CAL/DUE: 10/2023; REMOVED VACUUM BAG SYSTEM; TRIMMED AND CLEANED REPAIR EDGES IAW SRM 51-70-14-2R-3 PAR. 4.A.(3)-(5); & (11)(A)-(L).[

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