Service difficulty report · Support Angle · Boeing 7377H4

Difficulty date
October 7, 2022
Submitted
November 15, 2022
Operation
Air carrier
Aircraft
N953WN
Make and model
Boeing 7377H4
Aircraft serial
36668
Aircraft time
38,362 hours, 23,373 cycles
Part
Support Angle
Condition
Cracked
Location
Bs 663 Bulkhead
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

MLG A/C BAY AFT SECTION STA663 VAPOR BARRIER ANGLE SUPPORT HAS CRACK DOT EV34 / [01] REMOVED FASTENERS AT RT UPPER WING CENTER SECTION REAR SPAR VAPOR BARRIER ATTACH ANGLE FROM RBL-5 TO RBL-60 STA 663 REF USED SRM 51-40-02-0G-0;[02] REMOVED RT SIDE UPPER VAPOR BARRIER ANGLE AT STA 663 BETWEEN RBL-5 TO RBL-60 REF USED SRM 51-40-02-0G-0;[04] FABRICATED REAR SPAR WING CENTER SECTION RT SIDE UPPER VAPOR BARRIER ANGLE MATERIAL USED 2024-0.063' REF USED DWG#111A1322;[05] CORRECTION STEP#4:FABRICATED REAR SPAR WING CENTER SECTION RT SIDE UPPER VAPOR BARRIER ANGLE MATERIAL USED 2024-0.063' PO#1748073 LOT#362761B9 REF USED DWG#111A1322;13] INSTALLED VAPOR BARRIER WEB RT SIDE ANGLE AND PARTIALLY INSTALLED FASTENERS FROM RBL-5 TO RBL-60 REF USED SEM 51-40-02-0G-0;[14] VERIFIED STEP 13 PARTIALLY FASTENERS INSTALLATION;[15] INSTALLED 100% FASTENERS AT RT VAPOR BARRIER WEB ANGLE REF USED SRM 51-40-02-0G-0AND DWG#111A1000;[16] REM0VED AND REPLACE MLG BAY AFT SECTION STA 663 BETWEEN RBL-5 TO RBL-60 UPPER ANGLE REF USED SRM 51-40-02-0G-0 AND DWG#111A1000;[17] VERIFIED STEPS 15 AND 16<BR><BR>PENDING LEAK CHECK;[18] LEAK CHECK WILL BE ACCOMPLISHED ON CARD # TTG8Q00FL81H;[19] STEP 17 IS RII; VERIFIED INSTALLATION;[20] VERIFIED STEP 18 LEAK CHECK WILL BE ACCOMPLISHED ON CARD # TTG8Q00FL81H

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