# SDR SIMA201122903

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 13, 2011
- Submitted: August 17, 2011
- Operation: Air carrier
- Aircraft: [N677AE](https://openairdocs.org/aircraft/N677AE), registered now
- Make and model: Emb EMB-145LR
- Registry model: [EMB EMB-145LR](https://openairdocs.org/model/embraer-emb-145lr) (OpenAirDocs)
- Aircraft serial: 145810
- Aircraft time: 18,586 hours, 16,046 cycles
- System (JASC): [3251 · Steering Unit](https://openairdocs.org/jasc/3251)
- Part: O-Ring
- Part number: NAS16126
- Condition: Damaged
- Location: Steering Control
- Stage of operation: CL
- 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/SIMA201122903

## Discrepancy

AIR TURNBACK - NR 1 HYD SYS LOW QTY CAUTION, THEN SHORTLY AFTER GOT A NR 1 HYD PUMP FAIL WARNING MSG.  CFR WAS CALLED.  AC LANDED SAFELY WITHOUT INCIDENT.  REMOVED AND REPLACED O-RING ON STEERING CONTROL UNIT IAW EMD 145 AMM 29-10-13, LEAK CHECK GOOD.

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