# SDR SIMA20251120002

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 20, 2025
- Submitted: December 8, 2025
- Operation: Air carrier
- Aircraft: [N257NN](https://openairdocs.org/aircraft/N257NN), registered now
- Make and model: Emb ERJ 170-200 LR
- Registry model: [EMB ERJ 170-200 LR](https://openairdocs.org/model/embraer-s-a-erj-170-200-lr) (OpenAirDocs)
- Aircraft serial: 17000674
- Aircraft time: 22,024 hours, 14,737 cycles
- System (JASC): [5311 · Fuselage Main, Frame](https://openairdocs.org/jasc/5311)
- Part: Frame
- Part number: 17060377005
- Condition: Corroded
- Location: Zone 100
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SIMA20251120002

## Discrepancy

SSI Z150-002 FRAME FR90A IS CORRODED ON AFT FACE BETWEEN STGR 27L AND 25L. (LEVEL 2 CORROSION). BLENDED ON CORROSION ON AFT FACE BETWEEN 27L AND 25L PER EMB 175 SRM 51-10-03. ORIGINAL MATERIAL THICKNESS .032" PER EMB 175 SRMI 53-30-04-10. MATERIAL LOSS .018", FOUND TO BE OUT OF LIMITS PER EMB 175 SRM 53-30-04/AD01. LOCATED, DRILLED, DEBURRED AND TREATED FASTENER HOLES ON NEW FR-90A PN:170-60377-005 PER EMB-175 SRM 51-40-02. CLEANED, PREPPED AND RESTORED FINISH ON FR-90A IAW E175 SRM 51-23-06, ETN-EJ-51-015. REMOVED AND REPLACED FRAME AT FR90A PER EMB-175 SRM 51-40-08. LEVEL 2 CORROSION

---
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.