Service difficulty report · Web · Boeing 7377H4

Difficulty date
April 25, 2020
Submitted
May 18, 2020
Operation
Air carrier
Aircraft
N472WN
Make and model
Boeing 7377H4
Aircraft serial
33831
Aircraft time
55,520 hours, 32,985 cycles
Part
Web
Condition
Corroded
Location
Fuselage
Stage of operation
IN
How discovered
V
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 SUBTHRESHOLD WEB AT ACB BS796 - BS847 RBL23 WL161. / REMOVED CORROSION FROM ACB SUBTHRESHOLD WEB BS796-847 RBL-23 MORE THAN 50% MATERIAL LOST ORIGINAL MATERIAL THICKNESS 0.045' FOUND TO BE OUT OF LIMIT IAW SRM 53-60-15-1A-1 LOCATED AND DRILLED NEW WEB ITEM #7531818 IAW SRM 51-40-05-0G-0 AND DRW# 146A8120 AND INSTALLED IAW SRM 51-40-02-0G-0 AND DWG# 146A8120

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