# SDR SWAA2023040312195

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 3, 2023
- Submitted: April 3, 2023
- Operation: Air carrier
- Aircraft: [N556WN](https://openairdocs.org/aircraft/N556WN), registered now
- Make and model: Boeing 737-7BD
- Registry model: [Boeing 737-7BD](https://openairdocs.org/model/boeing-737-7bd) (OpenAirDocs)
- Aircraft serial: 33936
- Aircraft time: 37,398 hours, 21,958 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Plate
- Condition: Corroded
- Location: Zn 100 Fus Lower
- 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/SWAA2023040312195

## Discrepancy

MULTIPLE AREA OF CORROSION ON FWD CARGO BAY FLOOR TO SIDEWALL SUPPORT AT LBL 24 BS 500A+6-BS 500C+2.<[01] PARTIAL STEPS 1 AND 2.;[02] PARTIAL STEPS 1 AND 2; OUT OF LIMITS;[03] RECEIVED EXTRUSION P/N BAC1496-444 LOT. 1515896-1. LOCATED AND DRILLED (2EA) EXTRUSION (FORMED CHANNEL) ON FWD CARGO BAY L/H BTW BS 400 - 500D LBL25 WL 156 IAW SRM 51-40-05; SRM 53-00-53-2R-6 AND DWG'S 143A7501 REV: A & DWG 143A7500. MADE (1EA;) SPLICE SIDEPLATE FROM BAC1496-444 LOT:1506362-1 LOCATED AT BS 480+10 LBL25; WL 156 IAW SRM 53-00-53-2R-6 REPAIR 6 TABLE 201 ITEM [2].<BR> APPLIED CHEMICAL CONVERSION COATING TO REPAIR PARTS IAW SRM 51-20-01. OK TO APPLY PRIMER TO REPAIR PARTS.;[04] VERIFIED CORRECTIVE ACTION STEP 3. VERIFIED OK TO APPLY PRIMER.;[05] APPLIED PRIMER ON REPAIR PARTS IAW SOPM 20-41-02.<BR>OK TO INSTALL (1EA.) SPLICE SIDEPLATE AND BONDED NUTS PLATE.;[06] VERIFIED CORRECTIVE ACTION 5.<BR>OK TO INSTALL SPLICE;[07] INSTALLED (1EA.) SPLICE SIDEPLATE LOCATED AT BS. 480+10 LBL25; WL 156 IAW SRM 53-00-53-2R-6 TABLE 201 ITEM [2].<BR>INSTALLED BONDED NUTS PLATE IAW SOPM 20-50-12.;[08] VERIFIED CORRECTIVE ACTION #7<BR>VERIFIED MEASUREMENTS.;[09] TASK CARD COMPLETE

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