# SDR SWAA2021091400278

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 31, 2021
- Submitted: September 15, 2021
- Operation: Air carrier
- Aircraft: [N491WN](https://openairdocs.org/aircraft/N491WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 33867
- Aircraft time: 53,758 hours, 31,898 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Support Angle
- Condition: Corroded
- Location: Bs 500d
- 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/SWAA2021091400278

## Discrepancy

CORROSION ON AFT BULKHEAD TO FLOOR SUPPORT ANGLE AT FWD CARGO BAY BS500D LBL23 TO RBL18 WL156. ; / [01] EVALUATED CORROSION; FOUND TO BE OUT OF LIMITS DUE TO NO LIMITS IN THE SRM AND REQUIRES REPLACEMENT PER SRM 51-10-02-0G-0; [02] VERIFIED CORRECTIVE ACTION ENTRY 1.; [03] REMOVED FCB AFT BLKHD BS500D LBL23 TO RBL23 WL156 IAW SRM 51-40-02.; [04] LOCATED AND DRILLED BULKHEAD SUPPORT PER SRM 51-40-05 AND DWG 143A7902; [05] VERIFIED BULKHEAD SUPPORT FASTENER HOLES WERE LOCATED AND DRILLED PER SRM 51-40-05 AND DWG 143A7902.; [06] ENAMEL TOAPCOAT AND CIC ACCOMPLISHED PER CUSTOMER CARD#TTG8Q004G8AZ. REQUEST OK TO INSTALL; [07] VERIFIED CORRECTIVE ACTION 6.<BR><BR>OK TO INSTALL SUPPORT.; [08] INSTALLED FCB AFT BLKHD BS500D LBL23 TO RBL23 WL156 IAW SRM 51-40-02. AND DWG: 143A7902.; [09] VERIFIED CORRECTIVE ACTION ITEM 8; [10] VERIFIED COMPETE

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