Service difficulty report · Channel · Boeing 7377Q8

Difficulty date
March 14, 2022
Submitted
April 18, 2022
Operation
Air carrier
Aircraft
N7877H
Make and model
Boeing 7377Q8
Aircraft serial
29359
Aircraft time
50,381 hours, 27,028 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 B.S. 947 - 986.5; R.B.L. 53; W.L. 209. / [01] REMOVED CORROSION FROM AFT SERVICE DOOR MOP SILL BS 947-986.5 MAXIMUM MATERIAL REMOVED AT BS 959 IN AREA OF 5' X 1' AT ORIGINAL MATERIAL THICKNESS 0.080' REMAINING MATERIAL THICKNESS 0.068' FOUND TO BE OUT OF LIMIT IAW SRM 53-70-15-1A-1 <BR>TOOLS USED CALIPER ID ATS2503; S/N A19335646;[02] VERIFIED REMOVED CORROSION FROM AFT SERVICE DOOR MOP SILL BS 947-986.5 MAXIMUM MATERIAL REMOVED AT BS 959 IN AREA OF 5' X 1' AT ORIGINAL MATERIAL THICKNESS 0.080' REMAINING MATERIAL THICKNESS 0.068' FOUND TO BE OUT OF LIMIT IAW SRM 53-70-15-1A-1.;[03] REMOVED AFT SERVICE DOOR MOP SILL IAW SRM 51-40-02-0G-0.;[04] LOCATED AND DRILLED AFT SERVICE DOOR MOP SILL PER SRM 51-40-05-0G-0 AND DWG NO. 147A0000. DWG NO. 147A8501;[05] CORRECTION OF ACTION 4. LOCATED AND DRILLED AFT SERVICE DOOR MOP SILL PER SRM 51-40-05-0G-0 AND DWG NO. 147A0000. DWG NO. 147A8501.<BR>OK TO INSTALL AFT SERVICE DOOR MOP SILL.;[06] UPDATED PART REMOVED;[07] INSPECTED & VERIFIED CORRECTIVE ACTION ITEMS 5 & 6. OK TO INSTALL NEW ASD MOP SILL GIVEN.;[08] INSTALLED NEW AFT SERVICE DOOR MOP SILL BS 947-986.5 RBL 53 WL 208 I.A.W SRM 51-40-02-0G-0 AND DWG 147A8501.;[09] INSPECTED & VERIFIED CORRECTIVE ACTION ITEM 8.;[10] VERIFIED FAULT TTG8Q00BALZ8 IS COMPLETE.

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