Service difficulty report · Attach Angle · Boeing 7378H4

Difficulty date
March 4, 2022
Submitted
March 23, 2022
Operation
Air carrier
Aircraft
N8683D
Make and model
Boeing 7378H4
Aircraft serial
36738
Aircraft time
20,316 hours, 9,429 cycles
Part
Attach Angle
Condition
Cracked
Location
Vapor Barrier
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 VAPOR BARRIER UPPER ATTACH ANGLE IS CRACKED AT L.B.L. 9. / FOUND CRACK AT BS 663 LBL9 WL 167 UPPER ATTACHMENT ANGLE <BR> TO BE OUT OF LIMITS PER SRM 57-10-10 VERIFIED APPLICABILITY OF SRM 57-10-10-2R-5 TO BE CORRECT REPAIR REFERENCE;[03] UPON FURTHER INSPECTION FOUND UPPER ATTACH ANGLE CRACKED ALSO AT LBL35 WL 167 DUE TO 2 CRACKS UPPER ATTACH ANGLE WILL BE REMOVED AND REPLACED FROM LBL 6 TO LBL 64;[04] REMOVED BS 663 VAPOR BARRIER UPPER ATTACH ANGLE LBL 6-LBL 64; WL 167 PER SRM 51-40-02.;[05] RECEIVED;LOCATED;DRILLED AND APPLIED CHEMICAL CONVERSION COATING OF NEW VAPOR BARRIER UPPER ATTACH ANGLE LBL 6-LBL 64; WL 167; BS 663; R.O 859747-SWA MATERIAL USED 2024T42 CLAD 0.063' LOT#1419330-1; FABRICATION AND HEAT TREATMENT VERIFIED IAW DWG 111A1322-9;BAC 5602;SRM 51-40-05-0G-0 AND DWG 111A1000; OK TO PRIMER.;[06] INSPECTED ACTION 5;[07] APPLIED PRIMER AND RESISTANT TEFLON COATING ON 663 VAPOR BARRIER UPPER ATTACH ANGLE PER DWG 111A1322-9;[08] INSPECTED ACTION 7;[09] OK TO INSTALL ATTACH ANGLE;[10] AFTER FURTHER INVESTIGATION; NEW ANGLE TO BE INSTALLED IN ACCORDING WITH SRM 51-10-02; NOT NEEDED REPAIR OF SRM 57-10-10-2R-5. OK TO INSTALL NEW ATTACH ANGLE INSTALLED NEW VAPOR BARRIER UPPER ATTACH ANGLE LBL 6-LBL 64; WL 167; BS 663 IAW DWG 111A1000; 111A1322-9;SRM 51-40-02-0G-0. INSTALLED AND CAP SEALED REMAINING FASTENERS AT BS663 LBL70 TO LBL72 IAW DWG #111A1000 AND SRM 51-40-02

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