NTSB Identification: CHI86FEP01.
The docket is stored on NTSB microfiche number 32873.
Accident occurred Saturday, March 29, 1986 in PORTAGE, WI
Aircraft: CESSNA 177, registration: N29849
Injuries: 2 Fatal.

NTSB investigators either traveled in support of this investigation or conducted a significant amount of investigative work without any travel, and used data obtained from various sources to prepare this aircraft accident report.

SEVERAL WITNESSES STATED THAT UPON CLIMBOUT FOLLOWING A LOW PASS, SMOKE CAME OUT OF THE ENGINE AND THE ENGINE SPUTTERED. THE AIRCRAFT WAS THEN SEEN IN A STEEP TURN. DURING THIS TURN THE WINGS REACHED A VERTICAL POSITION AND THE AIRCRAFT DESCENDED TO THE SURFACE OF A FROZEN LAKE. IT SUBSEQUENTLY SANK BELOW THE ICE. THE LAST TURN OCCURRED AT APPROXIMATELY 250 FEET AGL. THE CAUSE OF THE REPORTED LOSS OF POWER COULD NOT BE DETERMINED.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

REASON FOR OCCURRENCE UNDETERMINED

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

STALL..INADVERTENT..PILOT IN COMMAND

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

AIRCRAFT HANDLING..IMPROPER..PILOT IN COMMAND

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