# SDR N3XR2018121700305

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 14, 2018
- Submitted: December 17, 2018
- Operation: General aviation
- Filed by: [Embry-Riddle Aeronautical University Inc, repair station N3XR816N](https://openairdocs.org/faa-repair-station/N3XR816N/embry-riddle-aeronautical-university-inc.md) (OpenAirDocs)
- Aircraft: [N305ER](https://openairdocs.org/aircraft/N305ER), registered now
- Make and model: Diamon DA 42 NG
- Registry model: [Diamon DA 42 NG](https://openairdocs.org/model/diamond-aircraft-ind-da-42-ng) (OpenAirDocs)
- Aircraft serial: 42N205
- Aircraft time: 1,396 hours
- Engine: Austro E4
- Engine time: 1,396 hours
- System (JASC): [8100 · Exhaust Turbine System (Reciprocating)](https://openairdocs.org/jasc/8100)
- Part: Valve
- Part number: E4A41300801
- Condition: Failed
- Location: Ele Chargeover
- Part time: 1,396 hours
- Stage of operation: CL
- How discovered: O
- Nature of condition: R
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/N3XR2018121700305

## Discrepancy

DURING CLIMB TO 8,000 FEET POWER DECREASED , UN-COMMANDED, FROM 92% TO 70%. TROUBLESHOOTING REVEALED THE ELECTRIC CHANGE OVER VALVE, P/N-E4A-41-300-801 WAS DEFECTIVE. THAT PART WAS REPLACED AND ALL OPERATIONAL CHECKS SHOWED PROPER OPERATION.

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