# SDR SWAA2023040413530

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 8, 2023
- Submitted: April 4, 2023
- Operation: Air carrier
- Aircraft: N7819A
- Make and model: Boeing 737-7Q8
- Registry model: [Boeing 737-7Q8](https://openairdocs.org/model/boeing-737-7q8) (OpenAirDocs)
- Aircraft serial: 30649
- Aircraft time: 65,235 hours, 39,673 cycles
- System (JASC): [5322 · Fuselage Internal Mounting Structure](https://openairdocs.org/jasc/5322)
- Part: Intercostal
- 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/SWAA2023040413530

## Discrepancy

CORROSION ON AFT CARGO BAY INTERCOSTAL BS 787+9 RBL 6 WL 153<[01] EVALUATED CORROSION ON INTERCOSTAL BS 787+9 RBL 6 WL 153; FOUND TO BE OUT OF LIMITS DUE TO NO LIMITS IN THE SRM AND REQUIRES REPLACEMENT PER SRM 51-10-0-0G-0;[02] VERIFIED CORRECTIVE ACTIONS STEP 1.;[03] REMOVED AFT CARGO BAY INTERCOSTAL BS 787 TO BS 807 RBL 6 WL 153 PER SRM 51-40-02-0G-0;[04] LOCATED AND DRILLED NEW INTERCOSTAL BS 787 TO BS 807 RBL 6 WL 153 PER SRM 51-40-05-0G-0; AND DWG 146A8130. OK TO INSTALL;[05] VERIFIED CORRECTIVE ACTION 4.<BR>OK TO INSTALL;[06] INSTALLED INTERCOSTAL BS 787 TO BS 807 RBL 6 WL 153 PER SRM 51-40-02-0G-0; AND DWG 146A8130.;[07] VERIFIED ITEM 6 CORRECTIVE ACTIONS.;[08] VERIFIED MEASUREMENTS.

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