# SDR SWAA2022101839543

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 27, 2022
- Submitted: October 25, 2022
- Operation: Air carrier
- Aircraft: [N8644C](https://openairdocs.org/aircraft/N8644C), registered now
- Make and model: Boeing 737-8H4
- Registry model: [Boeing 737-8H4](https://openairdocs.org/model/boeing-737-8h4) (OpenAirDocs)
- Aircraft serial: 35973
- Aircraft time: 26,784 hours, 12,542 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Support
- Condition: Corroded
- Location: Aft Cargo
- 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/SWAA2022101839543

## Discrepancy

AFT CARGO BAY L/H FLOOR TO SIDEWALL SUPPORT PLATE HAS MULTIPLE AREAS OF CORROSION AROUND NUT PLATE HOLES BS727F TO BS847 LBL22 WL156 / [01] EVALUATED CORROSION AT ALL LOCATIONS; FOUND THE DEEPEST LOCATION TO BE AT BS 727H+10 LBL 22 WL 156; FOUND 0.015 REMOVED FROM ORIG 0.040 IN NUMEROUS 1'X1' AREAS; FOUND TO BE OUT OF LIMITS PER SRM 53-00-53-1A-2 USING DIAL DEPTH GAUGE ATS 2678 DUE 04/2023;[02] VERIFIED CORRECTIVE ACTIONS STEP 1; AND MEASUREMENTS TABLE.;[03] REMOVED FLOOR TO SIDEWALL SUPPORT DAMAGED SECTION AT BS727E+12'-847 RBL 22 WL 156 IAW SRM 53-00-53-2R-5 REP.5;[04] FABRICATED;LOCATED AND DRILLED;APPLIED CHEMICAL CONVERSION COATING AND PRIMER ON REPAIR AREA AND REPAIR PARTS NEW SECTION FLOOR TO SIDEWALL SUPPORT AND SPLICE BS727E+12'-847 LBL 22 WL 156 IAW SRM 53-00-53-2R-5 REP.5; EA M-22-153-01550 AND DWG 146A7500 MATERIAL USED BAC1496-377 7075T62 CLAD LOT#1503751-1. SPLICE LOCATED AT BS727E+12' AND 727J+13'.;[05] OK TO INSTALL.;[06] VERIFIED CORRECTIVE ACTION 4 AND 5.<BR>OK TO INSTALL;[07] INSTALLED NEW REPAIR PARTS NEW SECTION FLOOR TO SIDEWALL SUPPORT AND SPLICE BS727E+12'-847 LBL 22 WL 156 IAW SRM 53-00-53-2R-5 REP.5; EA M-22-153-01550 AND DWG 146A7500. SPLICE LOCATED AT BS727E+12' AND 727J+13'.;[08] ' THE DAMAGE WAS REPAIRED PER SRM 53-00-53-2R-5 (REPAIR 5) AND EA M-22-153-01550'.;[09] VERIFIED CORRECTIVE ACTION #7;[10] VERIFIED CORRECTIVE ACTION #8

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