# SDR SWAA2021071581799

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 9, 2021
- Submitted: July 15, 2021
- Operation: Air carrier
- Aircraft: [N489WN](https://openairdocs.org/aircraft/N489WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 33855
- Aircraft time: 54,253 hours, 32,244 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Intercostal
- 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/SWAA2021071581799

## Discrepancy

***CORROSION*** ON INTERCOSTAL AT AFT CARGO BAY BS769 RBL6 WL153. ; / [01] REMOVED INTERCOSTAL BS 767-787 RBL 6;WL 153 PER SRM 51-40-02-0G-0.; [02] EVALUATED CORROSION ON INTERCOSTAL; FOUND TO BE OUT OF LIMITS DUE TO NO LIMITS IN THE SRM AND REQUIRES REPLACEMENT PER SRM 51-10-02-0G-0; [03] VERIFIED PART OUT OF LIMITS DUE TO NO SRM LIMITS ESTABLISHED; [04] LOCATED; DRILLED; AND DEBURRED NEW INTERCOSTAL ACB BS 767-787; RBL 6; WL 153 IAW SRM 51-40-05-0G-0; DWG #146A8130. OK TO INSTALL.; [05] VERIFIED LOCATED; DRILLED; AND DEBURRED NEW INTERCOSTAL ACB BS 767-787; RBL 6; WL 153 IAW SRM 51-40-05-0G-0; DWG #146A8130. OK TO INSTALL.; [06] INSTALLED NEW INTERCOSTAL ACB BS 787-807; RBL 6; WL 153 IAW SRM 51-40-02-0G-0; DWG #146A8130.; [07] VERIFIED INSTALLATION OF NEW INTERCOSTAL ACB BS 787-807; RBL 6; WL 153 IAW SRM 51-40-02-0G-0; DWG #146A8130; [08] VERIFIED COMPLETION OF CUSTOMER CARD TTG8Q005DWR2

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