Service difficulty report · Web · Boeing 7377H4

Difficulty date
August 18, 2022
Submitted
September 27, 2022
Operation
Air carrier
Aircraft
N489WN
Make and model
Boeing 7377H4
Aircraft serial
33855
Aircraft time
57,460 hours, 34,246 cycles
Part
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; FLOOR AFT SHEAR WEB UPPER STRAP; BS 1016 TO BS 1016 + 6'; LBL 3 WL 208 / [01] REMOVED CORROSION ON STRAP IN A 2'X2.5'X.011 AREA IAW SRM 51-10-02-0G-0. ORIGINAL THICKNESS .080' SRM DOES NOT HAVE LIMTS FOR CORROSION ON STRAPS AT BS 1016. OUT OF LIMITS AND WILL BE REPLACED IAW SRM 51-10-02-0G-0 STEP 9; REPLACEMENT OF PART.;[02] UPDATED MEASUREMENT TABLE;[03] MEASUREMENT TAKEN BY ATS 2677; S/N UNKNOWN; DUE 11/2022;[04] REMOVED STRAP IAW SRM 51-40-02-0G-0;[05] UPDATED CORROSION LEVEL;[06] CERTIFY;[07] VERIFIED CORRECTIVE ACTION 1 AND 2 AS WELL AS THE MESUREMENT TABLE.;[08] PARTIALLY LOCATED AND DRILLED NEW STRAP P/N B1205-147A5620U3 IAW BOING DWG# 147A5620 BS 1016 TO 1016 + 6 LBL 3;[09] LOCATED AND DRILLED NEW STRAP P/N B1205-147A5620U3 IAW BOING DWG# 147A5620 BS 1016 TO 1016 + 6 LBL 3 AND B737-700 SRM 51-40-02-0G-0 FIGURE 1. OK TO INSTALL PART;[10] VERIFIED CORRECTIVE ACTION ITEM 8-9 OK TO INSTALL.;[11] APPLIED PS 870 C20 SEALANT AT 04 SEP-2022 16:22 UTC I.A.W SOPM 20-50-19 AND SRM 51-40-02-0G-0 AND DWG. 147A5600.;[12] VERIFIED CORRECTIVE ACTION ITEM 11; SEALANT APPLIED AT 16:22 UTC 04-SEP-2022.;[13] INSTALLED NEW STRAP ON FLOOR AFT SHEAR WEB BS 1016 <BR> TO BS 1016+6' LBL3 WL 208 IAW SRM 51-40-02 AND DWG: 140A9870 ID:0005 REV:A.;[14] VERIFIED CORRECTIVE ACTION #13;[15] CARD COMPLETE

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