# SDR SWAA2023082975862

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 6, 2023
- Submitted: August 29, 2023
- Operation: Air carrier
- Aircraft: [N297WN](https://openairdocs.org/aircraft/N297WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 32542
- Aircraft time: 51,861 hours, 31,224 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- 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
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA2023082975862

## Discrepancy

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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