Service difficulty report · Attach Angle · Boeing 7377K9

Difficulty date
August 23, 2022
Submitted
September 20, 2022
Operation
Air carrier
Aircraft
N7878A
Make and model
Boeing 7377K9
Aircraft serial
34320
Aircraft time
52,141 hours, 25,914 cycles
Part
Attach Angle
Condition
Cracked
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

BS 663 LOWER COMPOSITE BULKHEAD UPPER ATTACH ANGLE IS CRACKED AT LBL 10; WL 164. / [01] PERFORMED CUT OUT DAMAGE SECTION UPPER ANGLE AT VAPOR BARRIER BS 663 LBL 15 IAW SRM 57-10-10-2R-5 REPAIR 5; REMOVED (15 EA.) FASTENERS AT UPPER ATTACH ANGLE BTW BS 663 LBL 10; WL 164 IAW SRM 51-40-02-0G-0.<BR> EFFECTIVITY OF SRM 57-10-10-2R-5 REPAIR 5 IS APPLICABLE TO A/C. N7878WN.;[06] HFEC REQUIRE INSPECTION OF THE EDGES OF THE TRIM-OUT TO VERIFY CRACK FREE CONDITION.;[07] ACCOMPLISHED HFEC INSPECTION IAW NDTM D6-37239 PART 6; 51-00-00 PROC 23; NO CRACKS FOUND. TOOL I.D. IS000450 500D;[08] REQUEST DVI OF THE REPAIR AREA IAW SRM 57-10-10-2R-5 REPAIR 5 STEP 4.D.] RECEIVED THE REPAIR PARTS AND LOCATED AND DRILL FROM (1EA.) ATSHFAB-101-353. LOT: 547726 2024T42# 0.063' AND (1EA.) SPLICE ANGLE ATSHFAB-101-355. LOT:548789. 2024T42#0.071' IAW SRM 51-40-05-0G-0; SRM 57-10-10-2R-5 REPAIR 5 TABLE 201 ITEM [1][2]. FIG.202 SHEET 4. OK TO INSTALL.;[11] VERIFIED CORRECTIVE ACTION 10.<BR>OK TO INSTALL;[12] INSTALLED REPAIR PARTS (2EA) ATTACH ANGLE AND SPLICE ANGLE BTW BS 663 LBL 10 WL 164. IAW SRM 51-40-02-0G-0 AND SRM 57-10-10-2R-5 REPAIR 5 TABLE 201 ITEM [1][2]. FIG.202 SHEET 4. OK TO CUP SEAL TO THE AFT FASTENERS. APPLIED CAP SEAL;OVER HEAD FASTENERS ON BACK SIDE AS GIVEN IN SRM 51-80-01

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