Service difficulty report · Attach Angle · Boeing 7377H4

Difficulty date
June 3, 2021
Submitted
July 15, 2021
Operation
Air carrier
Aircraft
N489WN
Make and model
Boeing 7377H4
Aircraft serial
33855
Aircraft time
54,253 hours, 32,244 cycles
Part
Attach Angle
Condition
Cracked
Location
Center 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

B.S. 663 LOWER COMPOSITE BULKHEAD UPPER ATTACH ANGLE IS CRACKED AT L.B.L. 7; W.L. 164. ; / [01] CONFORMED -1 REPLACEMENT ANGLE AND -2 SPLICE ANGLE PER SRM 57-10-10-2R REPAIR 5; -1 REPLACEMENT ANGLE FABRICATED IN ACCORDANCE WITH SRM 57-10-10-2R REPAIR 5 REFER TO ATS BUILD RECORD ATSHFAB-101-353 JOB # 533544; -2 SPLICE ANGLE FABRICATED IN ACCORDANCE WITH SRM57-10-10-2R REPAIR 5 REFER TO ATS BUILD RECORD ATSHFAB-101-355 JOB # 539866; [02] CONFORMED -1 REPLACEMENT ANGLE AND -2 SPLICE ANGLE PER SRM 57-10-10-2R-5<BR><BR> -1 REPLACEMENT ANGLE FABRICATED IN ACCORDANCE WITH SRM 57-10-10-2R-5 REFER TO ATS BUILD RECORD<BR>ATSHFAB-101-353 JOB # 533544<BR><BR> -2 SPLICE ANGLE FABRICATED IN ACCORDANCE WITH SRM 57-10-10-2R-5 REFER TO ATS BUILD RECORD<BR>ATSHFAB-101-355 JOB # 539866; [03] INSTALLED EWIS PROTECTION ON REPAIR AREA PER AMM 20-60-07. REMOVED FASTENERS IN DAMAGE AREA PER SRM 51-40-02-0G-0.;[09] PERFORMED DVI AT REPAIR AREA BS 663 L.B.L 7 W.L 164 PER SRM 57-10-10-2R-5; [10] CERTIFIED STEP 9; [11] VERIFIED DVI OF THE REPAIR AREA AND UNDERLYING STRUCTURE BS 663 LBL 7 WL 164 PER SRM 57-10-10-2R-5. NO DAMAGE FOUND.; [12] LOCATED AND DRILLED REPAIR PARTS PER SRM 51-40-05-0G-0. APPLIED CHEMICAL CONVERSION COATING AND PRIMER ON REPAIR PARTS AND REPAIR AREA PER AMM 51-21-41-701 AND AMM 51-27-72-370-804. OK TO INSTALL; [13] CERTIFIED STEP 12; [15] INSTALLED REPAIR PARTS PER SRM 57-10-10-2R-5 AND SRM 51-40-02-0G-0; [16] CERTIFIED STEP 15; [17] VERIFIED REPAIR PART INSTALLATION PER SRM.

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