# SDR 2020FA0000343

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 24, 2020
- Submitted: July 24, 2020
- Operation: General aviation
- Aircraft: N416BL
- Make and model: Diamon DA 40 NG
- Registry model: [Diamon DA 40 NG](https://openairdocs.org/model/diamond-aircraft-ind-da-40-ng) (OpenAirDocs)
- Aircraft serial: 40NC086
- Aircraft time: 561 hours
- Engine: Austro E4
- Engine time: 561 hours
- System (JASC): [8120 · Exhaust Turbocharger](https://openairdocs.org/jasc/8120)
- Part: Actuator
- Part number: E4A41120000
- Condition: Deteriorated
- Location: Wastegate
- Part time: 379 hours
- Stage of operation: TO
- How discovered: O
- Nature of condition: O
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2020FA0000343

## Discrepancy

WASTEGATE ACTUATOR FAILS CAUSING ECU OVERBOOST FAIL CODES. WHEN THE ACTUATOR IS PRESSURE TESTED IT IS FOUND TO LEAK AIR DUE TO A LEAKING DIAPHRAGM. ACROSS A FLEET OF NINE DA40NGS AND DA42NGS ABOUT 25 OF THESE ACTUATORS HAVE NEEDED TO BE REPLACED OVER THE PAST 2 YEARS. THEY ONLY SEEM TO LAST 100-300HRS ROUGHLY.

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