# SDR DU0S2016FA0000132

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 11, 2016
- Submitted: March 11, 2016
- Operation: General aviation
- Aircraft: [N388DS](https://openairdocs.org/aircraft/N388DS), registered now
- Make and model: Diamon DA 42
- Registry model: [Diamon DA 42](https://openairdocs.org/model/diamond-aircraft-ind-da-42) (OpenAirDocs)
- Aircraft serial: 42AC139
- Aircraft time: 499 hours
- Engine: Lyc IO360M1A
- System (JASC): [7320 · Fuel Controlling System](https://openairdocs.org/jasc/7320)
- Part: Servo
- Part number: 25765681
- Part serial: 70DX8901
- Condition: Abnormal
- Location: Fuel System
- Part time: 499 hours
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DU0S2016FA0000132

## Discrepancy

FUEL INJECTOR DURING O/H.  IAW THE MFG CHECKLIST MAG CHECK IS AT 2200 RPM. MIXTURE IS LEANED TO PEAK, RPM THEN RETARDED TO 2200 RPM.  WHEN LEANED, NORMAL RISE IS 40-50 RPM. THIS WAS IN EXCESS OF 200 RPM. THE REPAIR STATION REPORTED RICHNESS. AT 513TT INJECTOR WAS REMOVED FOR REPAIR. THE REPAIR STATION REPORTED DEFORMITY OF THE SERVO STEM SEAL.

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