Service difficulty report · Attach Angle · Boeing 7377H4

Difficulty date
April 17, 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
Attach Angle
Condition
Cracked
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

F.E.D MOPSILL FOUND TO BE CRACKED AT FWD ATTACH FASTENER COMMON TO BS 303.9 FRAME<[01] REMOVED GIRT BAR BRACKET FLOOR ATTACHMENTS AT BS 312 AND BS 344 FOR ACCESS TO MOPSILL PER SRM 51-40-02-0G-0<BR><BR>BEGAN REMOVING FASTENERS IN MOPSILL PER SRM 51-40-02-0G-0;[02] VERIFIED SRM 53-10-15-1A-1 IS APPLICABLE FOR ALLOWABLE DAMAGE TO FED DOOR SURROUND STRUCTURE.<BR><BR>FED MOPSILL FOUND TO BE OUT OF LIMITS PER SRM 53-10-51-1A-1 PARA. 4C(1) FIG. 108 DETAIL C;[03] UPDATED MEASUREMENT TABLE.;[04] VERIFIED CORRECTIVE ACTION #2;[05] VERIFIED FED MOP SILL FOUND TO BE OUT OF LIMITS<BR>MEASUREMENT TABLE VERIFIED;[06] REMOVED MOPSILL FED LBL BS 270 TO BS 360 IAW SRM 51-40-02-0G-0 AND INSTALL FOD PROTECTION BS 277-360 LBL IAW AMM 20-60-07;[07] CERTIFY;[08] RECEIVED FROM TOOL ROOM NEW FED CHORD (MOPSILL) P/N 654A0004-1073; LOT# 1520563-1.<BR>LOCATED AN DRILLED NEW FED CHORD (MOPSILL) PER SRM 51-40-05-0G-0 AND BOEING DWG# 141A8110.;[09] CERTIFIED CORRECTIVE ACTION 8;[10] VERIFIED CORRECTIVE ACTION #8;[11] OK TO INSTALL NEW FED CHORD (MOPSILL).;[12] VERIFIED CORRECTIVE ACTION #11; OK TO INSTALL;[13] INSTALLED ON MOPSILL 100% OF TEMPORARY AND PERMANENT FASTENERS WITH SEALANT C-20 AT 21-APR-23 05:30 UTC PER SRM 51-4-02-0G-0 AND BOEING DWG 141A8110.;[14] INSTALLED MOPSILL BS270 - BS360; WL208 PER SRM 51-4-02-0G-0 AND BOEING DWG 141A8110.;[15] VERIFIED CORRECTIVE ACTION #13; #14.

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