Service difficulty report · Plate · Boeing 7377H4

Difficulty date
April 10, 2023
Submitted
May 19, 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
Cracked
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

FOUND 2 EA AREAS OF CORROSION ALONG MOP SEAL THRESHOLD I/B ATTACH PLATE FED AT BS 313.4-316 WL 208 LBL 59 AND BS 334-336.5 WL 208 LBL 62.5<[01] VERIFIED APPLICABILITY FOR SRM 53-10-15-1A-1;[02] REMOVED CORROSION ALONG MOP SEAL THRESHOLD I/B ATTACH PLATE FED AT <BR>BS 313.4-316 WL 208 LBL 59 LENGTH: 4.5' X WIDTH: 0.9' <BR>BS 334-336.5 WL 208 LBL 62.5 LENGTH: 3' X WIDTH: 0.9' PER SRM 53-10-15-1A-1 FIG. 103 DETAIL H;[03] REQUEST NDI FOR MATERIAL REMAINING THICKNESS; [06] REMOVED CORROSION ALONG MOP SEAL THRESHOLD I/B ATTACH PLATE FED AT<BR>BS 334-336.5 WL 208 LBL 62.5 LENGTH: 3' X WIDTH: 0.9' D:0.066' FROM ORIGINAL THICKNESS 0.080' FOUND TO BE OUT OF LIMITS PER SRM 53-10-15-1A-1 FIG. 103 DETAIL H<BR>3;[07] REMOVED MOP SEAL THRESHOLD I/B ATTACH PLATE FED AT BS 312-344 WL 208 LBL 60 PER SRM 51-40-02-0G-0;[08] VERIFIED CORRECTIVE ACTIONS STEP 6.;[09] RECEIVED FROM TOOL ROOM NEW FED MOP SEAL THRESHOLD I/B ATTACH PLATE P/N 141A8112U20; LOT# 1524424-1.<BR>LOCATED AND DRILLED PER SRM 51-40-05-0G-0 AND BOEING DWG# 141A8110. OK TO INSTALL.;[10] VERIFIED CORRECTIVE ACTION #9; OK TO INSTALL

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