Service difficulty report · Barrier · Boeing 7377H4

Difficulty date
May 3, 2023
Submitted
May 25, 2023
Operation
Air carrier
Aircraft
N416WN
Make and model
Boeing 7377H4
Aircraft serial
32453
Aircraft time
70,967 hours, 42,001 cycles
Part
Barrier
Condition
Debonded
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

FWD WET ARE MOISTURE BARRIER DISBONDED FROM FLOOR PANEL 8 INCHES AFT OF FWD LAV.<[01] APPLIED LS4410 SEALANT TO DAMAGE AREA AS NEEDED PER AMM 53-21-00-300-801-NG.;[02] APPLIED LS4410 SEALANT TO DAMAGE AREA AS NEEDED PER AMM 53-21-00-300-801;[03] VERIFIED CORRECTIVE ACTION 1 SEALANT APPLICATION TO FORWARD WET AREA AS REQUIRED;[04] CLEANED AND INSTALLED 4IN SEAM TAPE AS REQUIRED PER AMM 53-21-00-300-801;[05] CLEANED FLOOR PANELS AS REQUIRED CLEANED AND INSTALLED 4IN SEAM TAPE AS REQUIRED IN THE FWD WET AREA PER AMM 53-21-00-300-801;[06] VERIFIED CORRECTIVE ACTION 5 SEAM TAPE;[07] PARTIALLY INSTALLED MOISTURE BARRIER FROM 380-356 PER AMM 53-21-00-300-801;[08] PARTIALLY INSTALLED MOISTURE BARRIER AS NEEDED FROM BS 380-356 RBL55-LBL55 WL 208 PER AMM: 53-21-00-300-801;[09] INSTALLED MOISTURE BARRIER AS NEEDED FROM BS 380-291.5 RBL55-LBL55 WL 208 PER AMM: 53-21-00-300-801;[10] VERIFIED CORRECTIVE ACTIONS 7-9.

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