Service difficulty report · Attach Angle · Boeing 7378H4

Difficulty date
June 15, 2023
Submitted
July 19, 2023
Operation
Air carrier
Aircraft
N8543Z
Make and model
Boeing 7378H4
Aircraft serial
63587
Aircraft time
19,500 hours, 9,726 cycles
Part
Attach Angle
Part number
UNKNOWN
Condition
Cracked
Location
Zn 100 Fus Lower
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

R/H BS663 UPPER ATTACH ANGLE IS CRACKED ON VAPOR BARRIER RBL8 WL167.68<[01] INSTALLED EWIS PROTECTION ON REPAIR AREA BS 663 RBL 6 TO 35 WL 155 TO 167 IAW AMM 20-60-07.;[02] R/H BS663 UPPER ATTACH ANGLE CRACKED ON VAPOR BARRIER RBL8 WL167.68 WAS FOUND CRACKED ON RBL 37 AND ANGLE MUST BE REPLACED IAW SRM 51-10-02-0G-0 PAR.9.;[06] RECEIVED; LOCATED; DRILLED; APPLIED CHEMICAL CONVERSION COATING; PRIMER AND TEFLON COATING ON NEW R/H BS663 UPPER ATTACH ANGLE OF VAPOR BARRIER RBL6 TO 65 WL167.68 IAW SRM 51-40-05-0G-0 AND DWG 111A1322-10. RO.# 925455-SWA.;[07] CAP SEAL OF FUEL TANK REPAIR FASTENERS R/H BS663 UPPER ATTACH ANGLE ON VAPOR BARRIER RBL6-65 WL167.68 IS DOCUMENTED ON NRC TTG8Q00LNQZR STEP 5.;[12] INSTALLED FASTENERS OF HORIZONTAL FLANGE OF R/H BS663 UPPER ATTACH ANGLE ON VAPOR BARRIER RBL6-65 WL167.68 IAW SRM 51-40-02-0G-0 AND DWG 111A1322-10.;[13] RII VERIFIED CORRECTIVE ACTION ITEM 12.;[14] INSTALLED FASTENERS OF VERTICAL FLANGE OF R/H BS663 UPPER ATTACH ANGLE ON VAPOR BARRIER RBL6-65 WL167.68 IAW SRM 51-40-02-0G-0 AND DWG 111A1000 AND 111A7000.;[15] VERIFIED STEP 1 AND 2;[16] CORRECTION OF CORRECTIVE ACTION #12 INSTALLATION IAW DWG 11A1000 INSTEAD 111A1322-10.;[17] RII VERIFIED CORRECTIVE ACTION ITEM 16 DRAWING CORRECTION.;[18] APPLIED SEALING AROUND; CIC AND REMOVAL OF EWIS PROTECTION ON REPAIR AREA IAW SRM; 51-20-05; 51-20-01 AND SOPM 20-60-07.;[19] VERIFIED CORRECTIVE ACTION ITEM 18.<BR>VERIFIED MEASUREMENT TABLE COMPLETED.

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