# SDR R61A2021120400977

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 4, 2021
- Submitted: December 4, 2021
- Operation: Air carrier
- Aircraft: [N121HQ](https://openairdocs.org/aircraft/N121HQ), 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: 17000194
- Aircraft time: 34,731 hours, 27,035 cycles
- System (JASC): [5330 · Fuselage Main, Plate/Skin](https://openairdocs.org/jasc/5330)
- Part: Doubler
- Part number: 17091883005
- Condition: Corroded
- Location: Frms 90-91
- 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/R61A2021120400977

## Discrepancy

CORROSION ON INTERNAL SKIN BETWEEN FRAME 90/91 STRG 29R/28R. REMOVED AND REPLACED INTERNAL DOUBLER REF EMB ETD2021-170-039289 RESTORE FINISH REF EMB SRM 51-23-04, 51-23-05 & 51-23-06 ON SKIN. MAJOR REPAIR.

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