NTSB Identification: CHI86LA084.
The docket is stored on NTSB microfiche number 30747.
Nonscheduled 14 CFR
Accident occurred Monday, February 10, 1986 in MILWAUKEE, WI
Aircraft: CESSNA 207, registration: N18SA
Injuries: 1 Uninjured.
NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.
AFTER PREHEATING THE ENG THE PLT TOOK OFF AND DURING CLIMB THE CABIN FILLED WITH SMOKE AND THE ENG STOPPED. A FORCED LANDING WAS MADE ON A CITY STREET DURING WHICH THE LEFT WING CONTACTED A SIGN POLE. POST ACCIDENT TEARDOWN OF THE ENG DISCLOSED THAT AN OIL TEMP CONTROL VALVE REQUIRED TO RETAIN THE ENG OIL IN THE CRANKCASE UNTIL PROPER OPERATING TEMP IS ATTAINED WAS NOT INSTALLED. WITHOUT THIS TEMP VALVE, OIL IS PERMITTED TO FLOW THROUGH THE OIL COOLER. THE PLT ALSO FAILED TO VISUALLY CHECK THE VISCOSITY OF THE OIL AFTER PREHEATING THE ENG.
The National Transportation Safety Board determines the probable cause(s) of this accident to be:MAINTENANCE,SERVICE OF AIRCRAFT/EQUIPMENT..IMPROPER..OTHER MAINTENANCE PERSONNEL
The National Transportation Safety Board determines the probable cause(s) of this accident to be:AIRCRAFT PREFLIGHT..INADEQUATE..PILOT IN COMMAND
MAINTENANCE,REPLACEMENT..IMPROPER..OTHER MAINTENANCE PERSONNEL
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