# SDR SIMA20260113002

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 13, 2026
- Submitted: February 9, 2026
- Operation: Air carrier
- Aircraft: [N256NN](https://openairdocs.org/aircraft/N256NN), 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: 17000665
- Aircraft time: 22,500 hours, 15,096 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Floor Support
- Part number: 17061041402
- Condition: Corroded
- Location: Zone 200
- 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/SIMA20260113002

## Discrepancy

CORROSION ON INTERCOSTAL AFT OF FR90 Y+ 10.748" (MAJOR REPAIR)   REMOVED CORRODED AREA ON INTERCOSTAL BTW FR90 &FR91 +10.748" PER EMB-175 SRM 51-10-03. BLENDED AREA MEASURES L=1.4", W=0.7" D=0.- 009". THE ORIGINAL MATERIAL THICKNESS IS 0.040" PER EMB-175 SRMI 53-30-10/ FIGURE 10A (ITEM 280). BLENDED AREA IS FOUND TO BE OUT OF ALLOWABLE LIMITS PER EMB-175 SRM 51-75-16. LOCATED, DRILLED, DEBURRED, AND TREATED FASTENER HOLES ON NEW INTERCOSTAL P/N:170-61041-402 PER EMB-175 SRM 51-40-02, AND 51-23-04. RESTORED FINISH TO NEW INTERCOSTAL AND SUPPORT ANGLE PER EMB-175 SRM 51-23-06 AND CPM 51-25-00. REMOVED AND REPLACED INTERCOSTAL BETWEEN FR-90 AND FR-91 PER EMB-175 SRM 51-40-08. LEVEL 2 CORROSION

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