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 521RB DISBONDED ON CORNER / [01] IDENTIFIED LEADING EDGE PANEL 521RB MATERIAL IAW SRM 57-41-01-OI-4; FIGURE 3; ITEM 2; TABLE 3. FOUND DAMAGED PANEL NOT TO BE WITHIN ALLOWABLE LIMITS IAW SRM 57-41-01-1A-1 TABLE 101. PARA 4.A.5. AND WILL REPAIRED IAW SRM 57-41-01-2R-1 PARA 4.E AND SRM 51-70-05-2R-6. REMOVED THE DAMAGE FROM THE INNER SURFACE; NO MOISTURE NOTED AND CLEANED PER SRM 51-70-05-2R-6 PARA 4.A-D.;[02] REMOVED 1EA BACKUP PLATE TO FACILITATE REPAIR IAW SRM 51-40-02-OG-0 PARA 4.E.<BR>REMOVED ENTIRE ALUMINUM FOIL TO FACILITATE REPAIR IAW SRM 51-70-14-2R-3 PARA 4.A.(2).E.;[03] VALIDATED APPLICABILITY OF SRM 51-70-05-2R-6.;[04] UPDATED MEASUREMENTS.;[05] INSPECTED AND VERIFIED CORRECTIVE ACTIONS 1 THRU 4. OKAY TO PROCEED PER SRM 51-70-05-2R-6.;[06] CUT OUT REPAIR PLIES USING BMS 5-129TY2GR05 250DEG. LOT: 1491228-1; BMS 8-79CL3ST120 LOT: 1488453-1; BMS 8-79CL3ST1581 LOT:1486928-1<BR>ALSO; INSTALLED REPAIRS PLIES IAW SRM 51-70-05-2R-6 PARA 4.E.;[10] FABRICATED ALUMINUM FOIL USING BMS 8-289 LOT#1484605-1 INSTALLED USING BMS 5-128 LOT#JH1LAA7523 VACUUM BAGGED; LEAK CHECK GOOD USING VACUUM GAUGE ID: ATS2107 DUE: 09/2022 IAW SRM 51-70-14-2R-3 PARA 4.A.3-7;11(A-J).[12] REMOVED 1 EA. BACK PLATE TO FACILITATE REPAIR AND REINSTALLED 1 EA. BACK PLATE AFTER REPAIR PER. SRM 51-40-02-0G-0 PAR.4E AND PAR.4B.

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