Service difficulty report · Crease Beam · Boeing 7377H4

Difficulty date
April 27, 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
Crease Beam
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 CREASEBEAM INNER CHORD STA 685-727; RBL 65; WL 208.<[01] SRM 53-40-13-1A-1 IS APPLICABLE ALLOWABLE DAMAGE; UPDATED TABLE.;[02] UPDATED P/N IN MEASUREMENTS TABLE;[03] REMOVED 21 EA FASTENERS FOR ACCESS ON CREASEBEAM INNER CHORD STA 685-727; RBL 65; WL 208 PER SRM 51-40-02-0G-0.;[04] REMOVED CORROSION ON CREASEBEAM INNER CHORD BETWEEN STA 685-727; RBL 65; WL 208 PER SRM 51-10-02-0G-0 ON STEPS 1-5.;[05] VERIFIED STEPS 1-5.;[06] COMPLETED STEPS 6-9.;[07] MAX MATERIAL REMOVAL REMOVED WAS .005' FROM .073'. OUT OF LIMITS DUE TO BLENDS GOING OVER 3EA FASTENERS OVER SEVERAL AREAS PER SRM 53-40-13-1A-1.;[08] COMPLETED STEPS 1-5<BR><BR>VERIFIED CORRECTIVE ACTION 7.;[09] VERIFIED CORRECTIVE ACTION 7.;[10] INSTALLED 21 EA FASTENERS FOR ACCESS ON CREASEBEAM INNER CHORD STA 685-727; RBL 65; WL 208 PER SRM 51-40-02-0G-0; DWG# 144A5900; ID#5.;[11] VERIFIED CORRECTIVE ACTION 10;[12] VERIFIED MEASUREMENT TABLE;[13] EDIT TO CORRECTIVE ACTION ITEM 10: REF BOEING DWG 144A5900; SHEET 11;[14] CARD COMPLETE;[15] VERIFIED CORRECTIVE ACTION ITEMS AND MEASUREMENT FIELDS; CARD COMPLETE.

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