Service difficulty report · Web · Boeing 7377H4

Difficulty date
June 23, 2021
Submitted
August 4, 2021
Operation
Air carrier
Aircraft
N940WN
Make and model
Boeing 7377H4
Aircraft serial
36900
Aircraft time
39,596 hours, 24,067 cycles
Part
Web
Condition
Corroded
Location
Bs 440-494
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

FORWARD CARGO BAY BS440-494 RBL 25 WL157 SUBWEB THRESHOLD IS CORRODED. / [01] EVALUATED CORROSION FROM BS 440-494 FOUND DEEPEST LOCATION AT BS 460 FOUND 0.015 REMOVED FROM ORIG 0.045 FOUND TO BE OUT OF LIMITS PER SRM 53-30-15-1A-1 USING DEPTH GAUGE P/N ATS400 S/N UNKNOWN; [02] VERIFIED CORROSION TO BE OUT OF LIMITS IAW SRM 53-30-15-1A-1; [03] REMOVED FCB SUB THRESHOLD WEB BS440 - BS494; RBL25; WL157 PER SRM 51-40-02-0G-0; [04] LOCATED AND DRILLED FCB SUBWEB THRESHOLD BS440 - BS494; RBL25; WL157 PER SRM 51-40-050G-0 AND DWG 143A8330; [05] VERIFIED LOCATED AND DRILLED FCB SUBWEB THRESHOLD BS440 - BS494; RBL25; WL157 PER SRM 51-40-050G-0 AND DWG 143A8330; [06] OK TO INSTALL.; [07] INSPECTED; OK TO INSTALL; [08] INSTALLED FCB SUBWEB THRESHOLD BS440 - BS494; RBL25-29; WL157 PER SRM 51-40-02-0G-0 AND DWG 143A8330; [09] VERIFIED FCB SUBWEB THRESHOLD INSTALLED BS440 - BS494; RBL25-29; WL157 PER SRM 51-40-02-0G-0 AND DWG 143A8330; [10] COMPLETE

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