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SDR SWAA2022022874589

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Service difficulty report · Barrier · Boeing 737*

FAA SDR system

Difficulty date
February 3, 2022
Submitted
February 28, 2022
Operation
Air carrier
Aircraft
N7842A
Make and model
Boeing 737*
Aircraft serial
30237
Aircraft time
59,706 hours, 37,397 cycles
System (JASC)
5714 · Wing, Center Box
Part
Barrier
Condition
Peeling
Location
Center Wing Box
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

AREA ABOVE WING CENTER SECTION BETWEEN BS 580 TO BS 560 RBL-60 TO RBL-65 FUEL VAPOR BARRIER COATING PEELING OFF / [01] OPENED FLOOR PANEL 232 SF AS PER B-737-700 SRM 51-40-02-0G-0;[02] AREA CLEANED AND FUEL BARRIER SEALANT APPLIED ON AREA ABOVE WING CENTER SECTION BETWEEN BS 560-BS 580 AS PER B-737-700 AMM 28-11-00-300-804.;[03] VERIFIED STEP 1 AND 2.;[04] PERFORMED NDT THICKNESS CHECK ON APPLIED VAPOR BARRIER SEALANT IAW AMM 28-11-00-300-804. THICKNESS FOUND WITHIN ACCEPTABLE RANGE (NOT LESS THAN 0.007' OR MORE THAN 0.022') THICKNESS FOUND - 0.012'.;[05] APPLIED VAPOR SEAL AT WING CENTER SECTION BETWEEN BS 580 RLB 60 TO RBL 65 ON AREA ABOVE WING CENTER SECTION BETWEEN BS 560-BS 580 AS PER B-737-700 AMM 28-11-00-300-804.;[06] VERIFIED STEP 5.<BR>OK TO CLOSE FLOOR PANEL 232SF;[07] INSTALLED FLOOR PANEL 232SF IN REFERENCE B737 SRM 51-40-02-0G-0;[08] VERIFIED.