Service difficulty report · Panel · Boeing 7377H4

Difficulty date
June 16, 2023
Submitted
July 17, 2023
Operation
Air carrier
Aircraft
N417WN
Make and model
Boeing 7377H4
Aircraft serial
29822
Aircraft time
71,145 hours, 42,399 cycles
Part
Panel
Condition
Pulled
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

L/W L/E PANEL 521CB HAS PULLED FASTENER HOLES (MARKED)<[01] IDENTIFIED PANEL MATERIAL IAW SRM 57-41-01-0I-4 FIG 5 TABLE 5 ITEM 3.<BR>FOUND DAMAGE TO 3EA FASTENER HOLES TO BE OUT OF ALLOWABLE LIMITS IAW SRM 57-41-01-1A-1 PARA 4.A(5).<BR>DAMAGE WILL BE REPAIRED IAW SRM 51-70-04-2R-9 PER SRM 57-41-01-2R-1 TABLE 202.<BR><BR>REMOVED 2EA BACKUP PLATES TO FACILITATE REPAIR IAW SRM 51-40-02-0G-0 PARA 4.E.<BR>REMOVED ENTIRE ALUMINUM FOIL BACKING TO FACILITATE REPAIR IAW SRM 51-70-14-2R-3 PARA 4.A(2)(B;C;E).<BR>REMOVED DAMAGE TO FASTENER LOCATIONS AND CLEANED REPAIR AREA IAW SRM 51-70-04-2R-9 PARA 4.A-C.;06] INSPECTED AND VERIFIED CORRECTIVE ACTIONS 4 AND 5.<BR><BR>POST REPAIR UT INSPECTED PER 737NDT PART 4 51-00-02. NO DEFECTS FOUND. TOOL E650 ATS2342 DUE 07/2023.;[07] FABRICATED ALUMINUM FOIL PLY USING BMS 8-289 LOT# 1511322-1; INSTALLED WITH BMS 5-128 LOT#JH3CA16476; VACUUM BAGGED; LEAK CHECK GOOD WITH VACUUM GAUGE ID:ATS2798 CAL DUE 06/2024; CURED WITH THERMOMETER ID:ATS2208 CAL DUE 10/2023; UNBAGGED AND TRIMMED EXCESS MATERIAL IAW SRM 51-70-14-2R-3 PARA 4.A(3-5; 11)(A-L).

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