Service difficulty report · Web · Boeing 7377H4

Difficulty date
February 7, 2023
Submitted
March 13, 2023
Operation
Air carrier
Aircraft
N277WN
Make and model
Boeing 7377H4
Aircraft serial
32531
Aircraft time
51,901 hours, 31,206 cycles
Part
Web
Condition
Cracked
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

LT VAPOR BARRIER LOWER WEB STA. 663 IS CRACK AT MID. O/B SECTION<[01] PERPARED DAMAGE AREA FOR REPAIR; AND PERFORMED DRY OUT; FOUND NO WATER; AS PER B737 SRM.51-70-04-2R-10.;[02] CORRECTION #1 PREPARED DAMAGE AREA FOR REPAIR; AND PERFO RMED DRY OUT; FOUND NO WATER; AS PER B737 SRM 51-70-04-2R-10.;[03] VERIFIED STEPS 1 AND 2. OK TO APPLY REPAIR TO AREA.;[04] REPAIRED LT VAPOR BARRIER LOWER WEB STA.663; AS PER B737 SRM .51-70-04-2R-10 MATERIAL USED PO.1473815 AND PO.1800112;[05] PERFORMED TAP TEST; ON REPAIR AREA; NO FOUND; NO DELAMINATION; AS PER B737 NDT 51-05-01. SECCION 5;[06] VERIFIED STEPS 4 AND 5;[07] APPLIED PRIMER AND TEFLON PAINT ON RT VAPOR BARRIER LOWER WEB STA.663 REF B 737 AMM 51-21-72-370-804 AND 51-21-81-370-801;[08] CORRECTION STEP 7 APPLIED PRIMER AND TEFLON PAINT ON L/H VAPOR BARRIER LOWER WEB STA.663 REF B 737 AMM 51-21-72-370-804 AND 51-21-81-370-801;[09] VERIFIED STEP 8

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