Service difficulty report · Channel · Boeing 7377H4

Difficulty date
May 3, 2022
Submitted
June 9, 2022
Operation
Air carrier
Aircraft
N477WN
Make and model
Boeing 7377H4
Aircraft serial
33988
Aircraft time
60,414 hours, 35,826 cycles
Part
Channel
Condition
Cracked
Location
Fuselage
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 LH MOPSILL BS APROX. 306; WL 208 (MARKED) / [01] VERIFIED APPLICABILITY OF SRM 53-10-15-0I-1 FOR IDENTIFICATION AND SRM 53-10-15-1A-1 FOR ALLOWABLE DAMAGE.<BR><BR>ORIGINAL THICKNESS OF MOPSILL IS .090' PER SRM 53-10-15-0I-1. REMOVED CORROSION IN A 2'X3' AREA; MAX DEPTH .010'. FOUND TO BE OUT OF LIMITS PER SRM 53-10-15-1A-1.<BR><BR>MEASURED WITH DIAL DEPTH GAUGE CAL ID: ATS2472; CAL DUE: 12/2022.;[02] VERIFIED CORRECTIVE ACTION 1. OUT OF LIMITS;[03] REMOVED DAMAGED MOP SILL IAW SRM CH 51-40-02.;[04] RECEIVED NEW FED MOPSILL; LOCATED AND DRILLED IAW SRM 51-40-05-0G-0; SRM 51-40-08-0G-0;[05] VERIFIED CORRECTIVE ACTION 4.;[06] OK TO INSTALL FED MOP SILL;[07] VERIFIED CORRECTIVE ACTION 6; OK TO INSTALL GIVEN.;[08] BEGAN INSTALLING MOP SILL AT L1 ENTRY IAW SRM CH 51-40-02 AND DRAWING #141A8110 ALL PERMANENT AND TEMPORARY FASTEBERS INSTALLED BEFORE SEALENT CURE TIME C-20 MIXED AT 01:00 UTC.;[09] VERIFIED ALL PERMANENT OR TEMP FASTENERS ARE INSTALLED PRIOR TO SEALANT SQUEEZE OUT LIFE.;[10] RII INSPECTED AND FOUND SEVERAL RIVETS BUCKTAILS IMPROPER/TOO FLAT; MARKED.;[11] EDIT TO CORRECTIVE ACTION ITEM 10; RESCINDING RII STATEMENT. UPDATED WRONG CARD; THERE ARE NO IMPROPERLY INSTALLED RIVETS ON THIS MOPSILL.;[12] CERTIFIED;[13] COMPLETE;[14] RII INSPECTED GOOD INSTALLATION OF MOPSILL PER SRM 51-40-02 AND DWG 141A8110.;[15] VERIFIED ALL STEPS COMPLETE; JOB COMPLETE.

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