# SDR SWAA2023033012989

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 6, 2023
- Submitted: March 30, 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): [5310 · Fuselage Main, Structure](https://openairdocs.org/jasc/5310)
- Part: Intercostal
- Condition: Cracked
- 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/SWAA2023033012989

## Discrepancy

AFT CARGO BAY INTERCOSTAL UNDER FLOOR TO SIDEWALL SUPPORT IS CRACKED AT BS 927-947 RBL 20<[01] NO ALLOWABLE DAMAGE LIMITS IN SRM<BR>REPAIR BY REPACEMENT IAW SRM 51-10-02-0G-0 PARAGRAPH # 9<BR><BR>REMOVED INTERCOSTAL UNDER FLOOR TO SIDEWALL SUPPORT<BR>AFT CARGO BAY. AT BS 927-947 RBL 20<BR>IAW SRM 51-40-02.;[02] LOCATED AND DRILLED INTERCOSTAL<BR>UNDER FLOOR TO SIDEWALL SUPPORT AFT CARGO BAY AT<BR>BS927 - BS947 RBL 20 P/N 147A7500-22 AND DWG 147A7500<BR>IAW SRM 51-40-05; OK TO INSTALL;[03] VERIFIED CORRECTIVE ACTIONS 1 AND 2.<BR>OK TO INSTALL;[04] INSTALLED INTERCOSTAL UNDER FLOOR TO SIDEWALL SUPPORT <BR>AFT CARGO BAY AT BS927 - BS947 RBL 20<BR>P/N 147A7500-22 AND DWG 147A7500;[05] VERIFIED CORRECTIVE ACTION #4.<BR>VERIFIED MEASUREMENTS.

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