# SDR CA021125003

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 5, 2002
- Submitted: January 6, 2003
- Operation: General aviation
- Aircraft: [N3055E](https://openairdocs.org/aircraft/N3055E), registered now
- Make and model: Mooney M20K
- Registry model: [Mooney M20K](https://openairdocs.org/model/mooney-m20k) (OpenAirDocs)
- Engine: Cont TSIO520NB
- System (JASC): [7310 · Engine Fuel Distribution](https://openairdocs.org/jasc/7310)
- Part: Shield
- Condition: Missing
- Location: Fuel Dist Head
- Stage of operation: CR
- How discovered: O
- Nature of condition: R, J
- Precautionary procedure: B, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA021125003

## Discrepancy

(CAN) A/C ENROUTE AT FLIGHT LEVEL 210,  DECLARED AN EMERGENCY.  AIRCRAFT TURNED BACK.  PILOT REPORTED ROUGH RUNNING ENGINE & MISFIRING BADLY  A/C LANDED SAFELY.  PILOTS EXPERIENCED POWER LOSS ON NR 3 CYLINDER FIRST & THEN ON BOTH NR 3 & 4 CYLINDERS. ENGINE IS EQUIPPED WITH CYLINDER HEAD TEMPERATURE PROBES FOR ALL CYLINDERS & COULD SEE 3 & 4 AS COLD CYLINDERS. BASED ON THE INVESTIGATION PILOTS ARE CONFIDENT PROBLEM WAS ICE CRYSTALS IN THE FUEL.  FUEL IS FEED TO THE CYLINDERS FROM A DISTRIBUTION HEAD ON THE TOP OF ENGINE.  A SHIELD THAT IS DESIGNED TO DEFLECT COLD AIR FROM THE DISTRIBUTION HEAD AND THE LINES COMING FROM IT, REQUIRED BY AN AD.

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