# SDR SIMA20151208002

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 8, 2015
- Submitted: December 9, 2015
- Operation: Air carrier
- Aircraft: [N646AE](https://openairdocs.org/aircraft/N646AE), registered now
- Make and model: Emb EMB-145LR
- Registry model: [EMB EMB-145LR](https://openairdocs.org/model/embraer-emb-145lr) (OpenAirDocs)
- Aircraft serial: 145213
- Aircraft time: 37,910 hours, 34,413 cycles
- System (JASC): [2120 · Air Distribution System](https://openairdocs.org/jasc/2120)
- Part: Bushing
- Condition: Worn
- Location: Ram Air Valve
- Stage of operation: CL
- How discovered: O
- Nature of condition: O
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SIMA20151208002

## Discrepancy

AFTER TAKEOFF A VERY LOUD CONTINUOUS & RANDOM CLACKING OR SPARKING SOUNDS WERE IMMEDIATELY HEARD IN THE COCKPIT.  FLIGHT RETURNED WITHOUT INCIDENT.  TRANSFERRED TO NRWC 646-ABI-02199.  R & R BUSHINGS TO RAM AIR VLV & ADJUSTED LINEAR ACTUATOR IAW AMM 21-25-03.  NO FURTHER DEFECTS NOTED.  OPERATIONS CHECKED GOOD.  SEE NRWC 646 ABI-02199 FOR CERTS & TURNOVER.

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