Service difficulty report · Stiffener · Boeing 7377H4

Difficulty date
June 6, 2022
Submitted
June 16, 2022
Operation
Air carrier
Aircraft
N929WN
Make and model
Boeing 7377H4
Aircraft serial
36631
Aircraft time
45,998 hours, 27,808 cycles
Part
Stiffener
Part number
111A1308U16
Condition
Cracked
Location
Vapor Barrier
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

STA 663.5 VAPOR BARRIER LOWER SECTION FOUND STIFFENER CRACKED AT RBL 25'. / [01] STARTED TO REMOVED STIFFENER AT VAPOR BARRIER STA 663.5 RBL 25' AS PER SRM 51-40-02-0G-0.;[02] REMOVED STIFFENER AT VAPOR BARRIER STA 663.5 RBL 25' AS PER SRM 51-40-02-0G-0.;[03] LOCATED AND DRILLED NEW STIFFENER AS PER SRM 51-40-05-0G-0.;[04] VERIFIED 3<BR>OK TO INSTALL;[05] INSTALLED STIFFENER AT STA 663.5 RBL 25 AS PER B737-700 SRM 51-40-02-OG-0 AND DRWG # 111A1000.;[06] VERIFIED AND INSPECTED STEP#5 STIFFENER INSTALLED AT STA 663.5 RBL 25.;[07] OK TO INSTALL CAP SEAL ON FASTENERS.;[08] CAP SEALED FASTENERS AS PER B737-700 SOPM 20-50-19;[09] REMOVED STIFFENER AT VAPOR BARRIER STA 663.5 RBL 25' AS PER SRM 51-40-02-0G-0. LOCATED AND DRILLED NEW STIFFENER AS PER SRM 51-40-05-0G-0. INSTALLED STIFFENER AT STA 663.5 RBL 25 AS PER B737-700 SRM 51-40-02-OG-0 AND DRWG # 111A1000. CAP SEALED FASTENERS AS PER B737-700 SOPM 20-50-19.;[10] VERIFIED AND INSPECTED STEP#8 AND #9 FINAL: REMOVED STIFFENER AT VAPOR BARRIER STA 663.5 RBL 25' AS PER SRM 51-40-02-0G-0. LOCATED AND DRILLED NEW STIFFENER AS PER SRM 51-40-05-0G-0. INSTALLED STIFFENER AT STA 663.5 RBL 25 AS PER B737-700 SRM 51-40-02-OG-0 AND DRWG # 111A1000. CAP SEALED FASTENERS AS PER B737-700 SOPM 20-50-19.

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