Service difficulty report · Web · Boeing 7377H4

Difficulty date
May 2, 2023
Submitted
May 31, 2023
Operation
Air carrier
Aircraft
N285WN
Make and model
Boeing 7377H4
Aircraft serial
32536
Aircraft time
51,630 hours, 31,054 cycles
Part
Web
Part number
UNKNOWN
Condition
Corroded
Location
Zn 100 Fus Lower
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 AFT R/H SHEAR WEB BS 1016-1028 RBL 2-10 AND BS 1016-1020 RBL 30-37 WL 208.<[01] SRM 53-70-51-1A-1 IS APPLICABLE ALLOWABLE DAMAGE; UPDATED TABLE;[02] REMOVED CORROSION ON AFT R/H SHEARWEB STA 1016-1028; RB2-10 AND STA 1016-1020; RBL 37; WL 208 PER SRM 51-10-02-0G-0. MAX MATERIAL REMOVED WAS .016' 1' BY 2' FROM .040'. OUT OF LIMITS PER SRM 3-70-51-1A-1;[03] VERIFIED CORRECTIVE ACTION 1 AND 2;[04] LOCATED AND DRILLED NEW AFT R/H SHEARWEB BS 1016 TO BS 1030 RBL 0 TO RBL 36 WL 208 PER SRM 51-40-05-0G-0 AND DWG 147A5730. OK TO INSTALL;[05] VERIFIED CORRECTIVE ACTION 4; OK TO INSTALL.;[06] INSTALLED NEW AFT R/H SHEARWEB BS 1016 TO BS 1030 RBL 0 TO RBL 36 WL 208 PER SRM 51-40-02-0G-0 AND DWG 147A5730.;[07] VERIFIED CORRECTION ACTION ITEM 6.;[08] ADDED TABLE MEASUREMENT;[09] VERIFIED ALL CORRECTION ACTIONS AND MEASUREMENT TABLE; CARD COMPLETE.

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