# SDR SWAA2023061651049

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 22, 2023
- Submitted: June 16, 2023
- Operation: Air carrier
- Aircraft: [N8535S](https://openairdocs.org/aircraft/N8535S), registered now
- Make and model: Boeing 737-8H4
- Registry model: [Boeing 737-8H4](https://openairdocs.org/model/boeing-737-8h4) (OpenAirDocs)
- Aircraft serial: 63596
- Aircraft time: 19,603 hours, 9,695 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Intercostal
- Part number: UNKNOWN
- Condition: Corroded
- 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/SWAA2023061651049

## Discrepancy

CORROSION ON INTERCOSTAL STA 950; RBL 23; RBL 26; WL 208.<[01] VERIFIED APPLICABILITY PER SRM 53-70-51-1A-1 ALLOWABLE DAMAGE 1;[02] EVALUATED CORROSION ON INTERCOSTAL STA 950; RBL 23; RBL 26; WL 208 2 PLACES 1'X1' INCH LOWEST MATERIAL REMOVED IS 0.015' ADJACENT TO ORIGINAL MATERIAL THICKNESS 0.090' FOUND TO BE OUT LIMITS I.A.W SRM 53-70-51-1A-1 ALLOWABLE DAMAGE 1 PAR 4.A(2) (A) FIGURE 104/ALLOWABLE DAMAGE 1 DETAIL E;[03] INTERCOSTAL STA947-BS967; RBL25; WL 208 TO BE REMOVED; DRILLED AND INSTALLED A NEW ON COSTUMER CARD TTG8Q00L6RSM STEP 1.;[04] TOOLS USED ON CORRECTIVE ACTION 2<BR>ATS1225<BR>S/N UNKNOWN <BR>DUE 08/2023<BR>ATS2738<BR>S/N A22004095<BR>DUE 04/2024;[05] VERIFIED CORRECTION ACTION ITEM 1;2;3;4. OUT OF LIMITS.;[06] COMPLETED TASK;[07] VERIFIED CORRECTIVE ACTION 6

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.