Service difficulty report · Web · Boeing 7377H4

Difficulty date
January 27, 2023
Submitted
March 6, 2023
Operation
Air carrier
Aircraft
N955WN
Make and model
Boeing 7377H4
Aircraft serial
36671
Aircraft time
38,739 hours, 23,607 cycles
Part
Web
Condition
Corroded
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

CORROSION ON SHEAR WEB B.S. 1016+14 LBL 5<[01] CORROSION ON SHEAR WEB BS 1016+14 AT LBL 5 FOUND TO BE OUT OF LIMITS DUE TO NO ALLOWABLE LIMITS GIVEN IN THE SRM.;[02] REMOVED SHEAR WEB IAW SRM CH 51-40-02.;[03] RECEIVED FROM TOOL ROOM NEW SHEAR WEB P/N 147A5620U15 LOT. 1516812-1. LOCATED AND DRILLED NEW SHEAR WEB PER SRM 51-40-02-0G-O AND DWG 147A5600.;[04] VERIFIED CORRECTIVE ACTIONS STEP 3.;[05] OK TO INSTALL;[06] OK TO INSTALL GIVEN FOR CORRECTIVE ACTIONS STEP 5.;[07] INSTALLED 100% OF TEMPORARY AND PERMANENT FASTENERS ON NEW L/H SHEAR WEB WITH SEALANT BMS-870 C20 TIME; DATE 02-FEB-2023 MIX TIME 7:34 UTC PER SOPM 20-50-19.;[08] INSPECTED ACTION 7;[09] INSTALLED WEB IAW SRM CH 51-40-02 AND DRAWING # 147A5730 ID #20.;[10] VERIFIED CORRECTIVE ACTION #9;[11] FAULT COMPLETE;[12] FAULT COMPLETE

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