# SDR SIMA200620207

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 18, 2006
- Submitted: July 27, 2006
- Operation: Air carrier
- Aircraft: [N639AE](https://openairdocs.org/aircraft/N639AE), registered now
- Make and model: Emb EMB-145LR
- Registry model: [EMB EMB-145LR](https://openairdocs.org/model/embraer-emb-145lr) (OpenAirDocs)
- Aircraft serial: 145182
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: Relief Valve
- Part number: 22280001005
- Part serial: 427
- Condition: Failed
- Location: Hyd System
- Stage of operation: CR
- How discovered: O
- Nature of condition: K, J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SIMA200620207

## Discrepancy

HYD 1 LOW QUANTITY IN FLIGHT, QTY REMAINED STABLE BUT LOW FOR 45 MINUTES.  ENGINE 1 HYD PUMP FAIL IN FLIGHT ASSOCIATED WITH LOUD SQUEAL NOISE REPORTED BY F/A IN REAR CABIN.  CREW DECLARED EMERGENCY AIRCRAFT LANDED SAFELY.  RAI EMERGENCY/PARKING BRAKE THERMAL RELIEF VALVE, OPS CHECK GOOD IAW EMB145 AMM 32-44-06, RETURNED AIRCRAFT TO SERVICE.  (M)

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