# SDR SWAA2021092708602

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 18, 2021
- Submitted: April 29, 2022
- Operation: Air carrier
- Aircraft: [N208WN](https://openairdocs.org/aircraft/N208WN), registered now
- Make and model: Boeing 737
- Aircraft serial: 29856
- Aircraft time: 52,294 hours, 30,932 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Channel
- Condition: Corroded
- Location: Fuselage
- 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/SWAA2021092708602

## Discrepancy

SUPPLEMENTAL INFORMATION: CORROSION ON RAIL AT AFT CARGO BAY BS773 RBL8 WL157. ; / [01] REMOVED CORROSION ON AFT CARGO BAY RAIL AT BS 773 RBL 8 WL 157. AREA MEASUREMENTS D=0.012' X L=1.9' X W=0.8' ORIGINAL THICKNESS 0.063' REMAINING THICKNESS 0.051'. FOUND TO BE OUT OF LIMITS PER SRM 53-00-53-1A-2 PARAGRAPH 4A(2) FIGURE 103 DETAIL A; B; C; D; AND E.; [02] VERIFIED CORROSION REMOVED AT BS 773 RBL 8 WL 157. AREA MEASUREMENTS D=0.012' X L=1.9' X W=0.8' ORIGINAL THICKNESS 0.063' REMAINING THICKNESS 0.051'. FOUND TO BE OUT OF LIMITS PER SRM 53-00-53-1A-2 PARAGRAPH 4A(2) FIGURE 103 DETAIL A; B; C; D; AND E.; 07] FABRICATED; LOCATED AND DRILLED CHANNEL REPAIR ITEM #53100004-001; LOT 1461073-1; AT AFT CARGO BAY BS773 RBL8 WL 157.I.A.W SRM53-00-53-2R-2 REPAIR 2; ALTERNATIVE 5. OK TO INSTALL.; [08] OK TO INSTALL REPAIR PARTS; [09] VERIFIED FABRICATION; LOCATED AND DRILLED CHANNEL REPAIR ITEM #53100004-001; LOT 1461073-1; AT AFT CARGO BAY BS773 RBL8 WL 157.I.A.W SRM53-00-53-2R-2 REPAIR 2; ALTERNATIVE 5. OK TO INSTALL; [10] INSTALLED REPAIR PARTS ON RAIL AT AFT CARGO BAY BS773 RBL8 WL157.I.A.W. SRM53-00-53-2R-2; REPAIR 2;ALTERNATIVE 5; REPAIR INSTRUCTIONS P AND Q.;

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