# SDR SIMA20210304001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 4, 2021
- Submitted: March 5, 2021
- Operation: Air carrier
- Aircraft: [N225NN](https://openairdocs.org/aircraft/N225NN), 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: 17000537
- Aircraft time: 12,820 hours, 8,527 cycles
- System (JASC): [3250 · Landing Gear Steering System](https://openairdocs.org/jasc/3250)
- Part: Manifold
- Condition: Failed
- Location: Nlg Steering
- Stage of operation: AP
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SIMA20210304001

## Discrepancy

ON APPROACH STEERING FAIL MESSAGE ON EICAS EVERY TIME GEAR EXTENDED. NOSEWHEEL STEERING DID INDEED FAIL. ONLY POSSIBLE DIRECTIONAL CONTROL ON GROUND WITH DIFFERENTIAL THRUST & DIFFERENTIAL BRAKING.DECLARED EMERGENCY.-C/A-RAR NOSEWHEEL STEERING MANIFOLD IAW ERJ 175 AMM 32-52-01. PERFORMED TAXI CHECK IAW GHC. OPC AND LEAK CHECK GOOD. NO FURTHER DEFECTS NOTED AT THIS TIME.

---
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.