Service difficulty report · Plate · Boeing 7377H4

Difficulty date
April 10, 2023
Submitted
May 17, 2023
Operation
Air carrier
Aircraft
N958WN
Make and model
Boeing 7377H4
Aircraft serial
36673
Aircraft time
38,993 hours, 23,664 cycles
Part
Plate
Condition
Corroded
Location
Zn 200 Fus Top
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

FOUND 3EA AREAS OF CORROSION ALONG MOPSILL THRESHOLD ATTACH PLATE FSD AT BS 310-312.5 WL 208 RBL 56.5; BS 316-317.5 WL 208 RBL 58 AND BS 319.5-320.5 WL 208 RBL 58.75<[01] VERIFIED APPLICABILITY FOR SRM 53-10-15-1A-2.<BR>REMOVED CORROSION FROM FSD MOPSILL THRESHOLD ATTACH PLATE L=10.0' X W=1.0' X D=.010'. ORIGINAL MATERIAL THICKNESS 0.090'; MECHANICALLY MEASURED WITH ID: ATS2827; S/N: UNKNOWN; D.D.: 01/31/24. FOUND TO BE OUT OF LIMITS PER SRM 53-10-15-1A-2; PAR. 4.C.(2).(A).;[02] LOCATED AND DRILLED NEW FSD MOPSILL ATTACH ANGLE IAW SRM 51-40-05-0G-0.;[03] OK TO INSTALL MOPSILL ATTACH ANGLE/PLATE.;[04] UPDATE TO PARTS LIST;[05] UPDATED MEASUREMENT TABLE;[06] CORRECTED MEASUREMENT TABLE UPDATE.;[07] CERTIFY;[08] VERIFED FSD MOPSILL THRESHOLD ATTACH PLATE OUT OF LIMITS;[09] VERIFIED CORRECTIVE ACTIONS #2 AND #3<BR>OK TO INSTALL MOPSILL ATTACH ANGLE/PLATE GIVEN<BR>MEASUREMENT TABLE VERIFIED FOUND ITEM 20 TO BE MARKED INCORRECTLY;[10] CORRECTIVE #20 MEASUREMENT TABLE UPDATE;[11] CERTIFY;[12] VERIFIED CORRECTIVE ACTION #10<BR>MEASUREMENT TABLE VERIFIED;[13] INSTALLED NEW MOPSILL THRESHOLD ATTACH ANGLE PLATE IN FSD WL 208 RBL 58.75 IAW SRM 51-40-02-0G-0 AND DWG #141A8310 REV:-;[14] CERTIFY;[15] VERIFIED CORRECTIVE ACTION #13;[16] TASK COMPLETE

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