Service difficulty report · Threshold · Boeing 7377H4

Difficulty date
April 15, 2020
Submitted
May 5, 2020
Operation
Air carrier
Aircraft
N460WN
Make and model
Boeing 7377H4
Aircraft serial
32464
Aircraft time
56,047 hours, 33,294 cycles
Part
Threshold
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 FCB BS440 - BS492 RBL28 WL157. / EVALUATED DAMAGE FOUND ON FCB SUBTHRESHOLD WEB MORE THAN 50% MATERIAL LOST; ORIGINAL MATERIAL THICKNESS 0.045' DAMAGE REMOVED IN AREA OF L=39' W=2.1' FOUND TO BE OUT OF LIMIT IAW SRM 53-30-15-1A-1 LOCATED AND DRILLED NEW SUBTHRESHOLD WEB ITEM# 7530597 IAW SRM 51-40-05-0G-0 2ND INSTALLED IAW SRM 51-40-02-0G-0 AND DWG# 143A8120 REV-B

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