What was found
SEVERE NOSE GEAR SHIMMY DURING LANDING. NOSE GEAR STRUT SERVICED WITH MIL-H-5606, REQUIRED 30-WT FORK OIL. NEXT FLT A SEVERE SHIMMY AGAIN. INSP REVEALED ENG MOUNT BROKEN 6 PLACES AS A RESULT. ENG MOUNT & NOSE GEAR STRUT REPLACED, ON NEXT FLT, A SEVERE NOSE GEAR SHIMMY ENCOUNTERED. INSP DISCLOSED NOSE GEAR STRUT HOT TO TOUCH & COLOR OF OIL CHANGED. COWLING BURNED NEAR TURBO CHARGER. STANDARD LANCAIR ES COWLING WAS NOT DESIGNED FOR A TURBOCHARGED ENG INSTALLATION. HEAT WITHIN COWL TRANSFERS INTO NOSE GEAR STRUT & HEATS STRUT & OIL TO A TEMP THAT RENDERS INTERNAL SHIMMY DAMPENING SYS INEFFECTIVE & DAMAGES OLEO STRUT. TELEDYNE TSIO-360 SERIES ENGINE IS NOT AN ENGINE INSTALLATION RECOMMENDED BY LANCAIR.