# SDR 95ZZZX1427

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 1, 1995
- Submitted: March 26, 2000
- Operation: General aviation
- Filed by: [Victor Aviation Services, Inc, repair station BJ3R399L](https://openairdocs.org/faa-repair-station/BJ3R399L/victor-aviation-services-inc.md) (OpenAirDocs)
- Aircraft: N210MG
- Make and model: Cessna T210L
- Registry model: [Cessna T210L](https://openairdocs.org/model/cessna-t210l) (OpenAirDocs)
- Aircraft serial: 21060838
- Engine: Cont TSIO520R
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Cylinders
- Condition: Worn
- Location: Engine
- Stage of operation: IN
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/95ZZZX1427

## Discrepancy

ENGINE RUN SMOH WITH MOBIL AV-1 ENGINE OIL.  ENG STARTED SHOWING HIGH READINGS OF IRON, CHROMIUM, ALUMINUN ON OIL ANALYSIS.  CYLS REMOVED FOR INSP.  ALL OIL CONTROL RINGS FND STUCK W/LEAD BUILD-UP & ALL CYL WALLS FND WORN UP TO .014 INCH. ENG REMOVED FROM ACFT & DISASSEMBLED.  FND VERY HIGH SLUDGE BUILD-UP IN ENG CAUSING PARTIAL BLOCKAGE OF MAIN OIL GALLEY.  THIS CAUSED PREMATURE MAIN & CONNECTING ROD BRNG WEAR TO NEAR FAILURE.  CRANKSHAFT ALSO FND SCORED AT PROP TRANSFER COLLAR AREA.  CAM FOLLOWERS FND PITTED.  ENG O/H 2-1/2 YEARS EARLIER W/ALL NEW CYLS, BRNGS, & CAMSHAFT FOLLOWERS INSTALLED.  SUBMITTER STATED SEEING SIMILAR DAMAGE IN OTHER ENG RUN ON THIS OIL.  RECOMMEND INSP OF ENG WITH THIS OIL.

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