Service difficulty report · Shear Web · Boeing 737*

Difficulty date
March 17, 2022
Submitted
April 20, 2022
Operation
Air carrier
Aircraft
N472WN
Make and model
Boeing 737*
Aircraft serial
33831
Aircraft time
58,559 hours, 34,804 cycles
Part
Shear Web
Condition
Corroded
Location
Aft Fuselage
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 AT B.S. 1016+5 - B.S. 1016+12; L.B.L. 5 - L.B.L. 19; W.L. 208.1. / [01] THIS STRUCTURAL ITEM DOES NOT HAVE ENTRIES IN SRM FOR ALLOWABLE DAMAGE LIMITS; WILL BE REPAIRED BY REPLACEMENT. PER SRM 51-10-02-0G-0 PARAGRAPH 9;[02] VERIFIED CORRECTIVE ACTION #1;[03] LOACATED AND RILLED NEW SHEAR WEB P/N 147A5620-15 AT B.S.1016- BS 1032; BL 0 TO LBL 38 W.L. 208.1. IAW SRM51-40-05-0G-0 AND DWG 146A5600; ID: 0032; REV: B.<BR><BR>OK TO INSTALL.;[04] VERIFIED CORRECTIVE ACTION 3. <BR><BR>OK TO INSTALL;[05] INSTALLED NEW SHEAR WEB P/N 147A5620-15 AT B.S.1016- BS 1032; BL 0 TO LBL 38 W.L. 208.1. IAW SRM 51-40-02-0G-0 AND DWG 146A5600;[06] UPDATED DWG. USED 147A5600;[07] CORRECTED MEASUREMENT 22;[08] CORRECTED MEASUREMENTS;[09] VERIFIED COMPLETE STEP 1.;[10] VERIFIED ALL STEPS COMPLETE.