Service difficulty report · Vapor Barrier · Boeing 7378H4

Difficulty date
May 20, 2026
Submitted
June 24, 2026
Operation
Air carrier
Aircraft
N8543Z
Make and model
Boeing 7378H4
Aircraft serial
63587
Aircraft time
28,864 hours, 14,775 cycles
Part
Vapor Barrier
Condition
Cracked
Location
Zone 100
Stage of operation
IN
How discovered
V
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

LEFT A/C BAY, BS 663 LBL 35, VAPOR BARRIER ANGLE WAS CRACKED. CUT AND REMOVED DAMAGED SECTION OF BS 663 VAPOR BARRIER ATTACH ANGLE FROM APPROX LBL35 TO LBL65 IAW SRM 57-10-10-2R-5. LOCATED HOLES ON VAPOR BARRIER REPLACEMENT ANGLE IAW SRM 57-10-10-2R-5. LOCATED HOLES ON VAPOR BARRIER REPLACEMENT ANGLE IAW SRM 57-10-10-2R-5. MATCH DRILLED REPLACEMENT ANGLE & FABRICATED REPAIR DOUBLER IAW SRM 57-10-10-2R-5, MATCH DRILLED REPLACEMENT ANGLE & FABRICATED REPAIR DOUBLER IAW SRM 57-10-10-2R-5. INSTALLED LT VAPOR BARRIER REPLACEMENT ANGLE AND DOUBLER FUEL TANK FASTENERS AT BS 663 IAW SRM 57-10-10-2R-5. ONLY FASTENERS COMMON TO THE FUEL TANK WERE INSTALLED. .CAP SEALED INTERNAL FUEL TANK FASTENERS AT BS 663 REPLACEMENT ANGLE AND REPAIR DOUBLER IAW SRM 57-10-10-2R-5 AND SRM 51-80-01 AT 22:45PM. INSTALLED VAPOR BARRIER REPLACEMENT ANGLE & SPLICE DOUBLER LOWER LEG FASTENERS AT BS 663 IAW SRM 57-10-10-2R-5. CAP SEALED EXTERNAL SURFACE OF REPAIR FASTENERS & FAY SEALED REPAIR PARTS IAW SRM 57-10-10-2R-5.

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