Service difficulty report · Channel · Boeing 7377H4

Difficulty date
July 6, 2023
Submitted
August 29, 2023
Operation
Air carrier
Aircraft
N297WN
Make and model
Boeing 7377H4
Aircraft serial
32542
Aircraft time
51,861 hours, 31,224 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 ASD MOP SILL BS965 - BS984 LBL53 WL208.<[01] CORRECTION ON CARD DESCRIPTION SHOULD READ <BR>CORROSION ON ASD MOP SILL BS965 - BS984 RBL53 WL208;[02] VERIFIED APPLICABILITY PER SRM 53-70-15-1A-1 ALLOWABLE DAMAGE 1;[03] REMOVED CORROSION ON AFT SERVICE DOOR MOPSILL STA 965-984; RBL 53; WL 208 ORIGINAL MATERIAL THICKNESS IS 0.080' LOWEST REMAINING MATERIAL THICKNESS IS 0.069' CORROSION FOUND TO BE OUT LIMITS I.A.W SRM 53-70-15-1A-1 ALLOWABLE DAMAGE 1 PAR.4.D(2)(A) FIGURE 103 DETAIL D; E<BR>TOOLS USED<BR>ATS1225<BR>S/N UNKNOWN<BR>DUE 08/2023<BR>ATS2738<BR>S/N A22004095<BR>DUE 04/2024;[04] REMOVED ASD MOPSILL I.A.W SRM 51-40-02-0G-0;[05] LOCATED AND DRILLED NEW ASD MOPSILL I.A.W SRM 51-40-05-OG-0 AND BOEING DWG 147A8501 OK TO INSTALL;[06] VERIFIED CORRECTIVE ACTIONS 1-5. CORROSION OF OUT OF LIMITS; VERIFIED DRILL UP; AND OK TO INSTALL GIVEN.;[07] INSTALLED 100% TEMPORARY AND PERMANENT FASTENER BEFORE SEALANT C20 SQUEEZE OUT TIME I.A.W SRM CHAPTER 51-20-05 AND SOPM 20-50-19 AND BOEING DWG 147A8501;[08] VERIFIED CORRECTIVE ACTION 7;[09] INSTALLED ASD MOPSILL I.A.W SRM 51-40-02-0G-0 AND BOEING DWG 147A8501 COMPLETED TASK;[10] VERIFIED CORRECTIVE ACTION 9;[11] VERIFIED MEASUREMENT TABLE

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