Service difficulty report · Channel · Boeing 7377H4

Difficulty date
July 6, 2023
Submitted
August 15, 2023
Operation
Air carrier
Aircraft
N229WN
Make and model
Boeing 7377H4
Aircraft serial
32498
Aircraft time
58,665 hours, 35,024 cycles
Part
Channel
Part number
UNKNOWN
Condition
Corroded
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

CORROSION ON AFT SERVICE DOOR MOP SILL BS 950-986 RBL 54 WL 208.<[01] REMOVED CORROSION ON MULTIPLE AREAS OF AFT SERVICE DOOR MOP SILL BS 950 - BS 986 RBL 54 WL 208 IAW SRM 51-10-02; ORIGINAL MATERIAL THICKNESS IS 0.080' IAW SRM 53-70-15-1A-1; MAXIMUM MATERIAL REMOVED IS 1.125'X.13'X0.013' REMAINING THICKNESS 0.067'; BLENDED AREA FOUND TO BE OUT LIMITS IAW SRM 53-70-15-1A-1;<BR>MEASURING TOOL USED <BR>ID: ATS400<BR>DUE: 09/2023;[02] REMOVED CORROSION ON MULTIPLE AREAS OF AFT SERVICE DOOR MOP SILL BS 950 - BS 986 RBL 54 WL 208 IAW SRM 51-10-02; ORIGINAL MATERIAL THICKNESS IS 0.080' IAW SRM 53-70-15-1A-1; MAXIMUM MATERIAL REMOVED IS 0.013' REMAINING THICKNESS 0.067'; BLEND AREA OF 1.125'X 13' BLENDED AREA FOUND TO BE OUT LIMITS IAW SRM 53-70-15-1A-1;<BR>MEASURING TOOL USED<BR>ID: ATS400<BR>S/N: NSN<BR>DUE: 09/2023;[03] VERIFIED CORRECTIVE ACTION ITEMS; OUT OF LIMTS.;[04] REMOVED ON AFT SERVICE DOOR MOP SILL BS 950-986 RBL 54 WL 208 I.A.W SRM 51-40-02-0G-0;[05] LOCATED AND DRILLED AFT SERVICE REPLACEMENT MOPSILL IAW SRM 51-40-02-0G-0 AND DWG 147A8501;[06] UPDATED MEASUREMENT TABLE STEP 14;[07] PARTIAL STEP 1;[08] VERIFIED CORRECTIVE ACTION 5.;[09] VERIFIED STEP 1.;[10] ALL STEPS VERIFIED;[11] MEASUREMENT TABLE VERIFIED

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