Service difficulty report · Vapor Barrier · Boeing 7377H4

Difficulty date
April 25, 2022
Submitted
May 31, 2022
Operation
Air carrier
Aircraft
N479WN
Make and model
Boeing 7377H4
Aircraft serial
33990
Aircraft time
59,976 hours, 35,850 cycles
Part
Vapor Barrier
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

COMPOSITE- R/H VAPOR BARRIER CRACKED. PERFORMED VISUAL INSPECTION AND TAP TEST FOUND CRACK SIZE 10' AT R/H AND CONTAMINATION AT VAPOR BARRIER PER B737 NTM PART 1 51-05-01; STOP DRILL ON CRACK ENDS 0.25'' PER B737 SRM 57-10-10-2R-2 PARAGRAPH(6.B) AND B737SRM51-10-02-0G-0 PARAGRAPH(12.A);PERFORMED DRY OUT ON R/H VAPOR BARRIER DAMAGE AREAS; FOUND NO WATER AS PER B737 SRM 51-70-04-2R-0 PARAGRAPH (4D);REPAIRED CRACK DAMAGE WITH A PERMANENT REPAIR ON R/H VAPOR BARRIER AS PER B737 SRM 51-70-04-2R-10; MATERIALS USED PO#1760049 AND PO#1690463; PRIMED AND TOP COAT R/H VAPOR BARRIER AS PER B737 AMM 51-21-99-300-802 MATERIALS USED PO# 1764903 AND PO#1758674;

More about the Boeing 737-7H4