Service difficulty report · Channel · Boeing 7377H4

Difficulty date
March 31, 2022
Submitted
May 2, 2022
Operation
Air carrier
Aircraft
N475WN
Make and model
Boeing 7377H4
Aircraft serial
32474
Aircraft time
59,744 hours, 35,276 cycles
Part
Channel
Condition
Corroded
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 MOP SILL AT AFT WET AREA BS992 - BS967 LBL50 WL208. / [01] FOUND SRM 53-7--15-1A-1 APPLICABLE FOR ALLOWABLE DAMAGE LIMITS OF MOP SILL.;[02] REMOVED MULTIPLE AREAS OF CORROSION ON MOP SILL BS967-992 LBL50 WL208; DEEPEST BLEND FOUND AT BS 986+6 MEASURES 2'X1'X0.012'; ORIGINAL THICKNESS 0.080'; FOUND TO BE OUT OF LIMITS PER SRM 53-70-15-1A-1.;[03] SRM CORRECTION; APPLICABLE SRM IS 53-70-15-1A-1;[04] VERIFIED CORRECTIVE ACTION 1-3;[05] REMOVED DAMAGED MOPSILL AT LH AFT L2 DOOR LOCATION IAW SRM CH 51-40-02.;[06] COMPLETED LOCATING AND DRILLING OF NEW AFT LH L2 DOOR MOP SILL PER SRM 51-40-05.;[07] UPDATED MEASUREMENTS TABLE;[08] VERIFIED CORECTIVE 6.;[09] OK TO INSTALL;[10] OKAY TO INSTALL MOP SILL AT L/H AFT ENTRY DOOR.;[11] SEALANT MIXED/APPLIED 11-APR-2022 14:00 UTC; INSTALLED 100% PERMENENT OR TEMP FASTENERS PRIOR TO BMS5-95 C20 SEALANT SQUEEZE-OUT TIME; REF. SOPM 20-50-19.;[12] VERIFIED CORRECTIVE ACTION ITEM 11 FOR SEALANT SQUEEZE-OUT.;[13] INSTALLED MOP SILL AT L/H AFT ENTRY DOOR PER SRM 51-40-02 AND DWGS 147A8501; 147A004 AND 147A0060.;[14] UPDATED PARTS;[15] CERTIFIED ACTION 13 JOB COMPLETE;[16] VERIFIED CORRECTIVE ACTION ENTRY 13.;[17] VERIFIED CARD COMPLETE.

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