Service difficulty report · Vapor Barrier · Boeing 7377H4

Difficulty date
August 7, 2026
Submitted
August 19, 2026
Operation
Air carrier
Aircraft
N246LV
Make and model
Boeing 7377H4
Aircraft serial
32507
Aircraft time
65,589 hours, 39,742 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

CRACK FOUND IN BS 639 L/H STUB BEAM STRAPS AFT FASTENER HOLE DURING NDI INSPECTION, ENGINEERING REQUIRED CRACK FOUND IN BS 639 L/H STUB BEAM STRAPS AFT FASTENER HOLE DURING NDI INSPECTION ENGINEERING REQUIRED L/H VAPOR BARRIER C/W STA.578-STA.616 VERIFIED STEP 2 C/W. OK TO INSTALL GIVEN FOR STA.639 STUB BEAM AND L/H STA.639 STUB BEAM STRAP. REJECT: STA 639 STUB BEAM O/B (ON OUTSIDE OF SKIN) 2EA FASTENERS HAVE INSUFFICENT THREAD PROTRUSION. VERIFIED STEPS 145 & 6 COMPLETE. VERIFIED ALL RII REQUIREMENTS HAVE BEEN MET. VERIFIED ALL RII REQUIREMENTS HAVE BEEN MET.

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