BE36 pilot reported an off field landing following a rough running engine that was spraying oil.

Attributes
ACN	1475092
Time
Date	201708
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Bonanza 36
Operating Under FAR Part	Part 91
Flight Phase	Descent
Route In Use	Direct
Flight Plan	None
Component
Aircraft Component	Engine
Person 1
Function	Single Pilot
Qualification	Flight Crew Private
Events
Anomaly	Aircraft Equipment Problem Critical Deviation - Procedural FAR Deviation - Procedural Published Material / Policy

Narrative:

On descent engine running rough and oil starting splashing out of engine and onto cockpit. I contacted approach and [advised ATC]. I decided to kill engine and fuel to engine and pick a field to land in. I landed safely in a field without injury to person plane or property. There was no damage to aircraft other than a small cowling puncture exit hole and oil covering the cowling and cockpit window. Upon gathering of records for preparation for insurance and FAA reports I noticed my medical had expired last month all other documents were in effect and proper.

Original NASA ASRS Text

Title: BE36 pilot reported an off field landing following a rough running engine that was spraying oil.

Narrative: On descent engine running rough and oil starting splashing out of engine and onto cockpit. I contacted Approach and [advised ATC]. I decided to kill engine and fuel to engine and pick a field to land in. I landed safely in a field without injury to person plane or property. There was no damage to aircraft other than a small cowling puncture exit hole and oil covering the cowling and cockpit window. Upon gathering of records for preparation for insurance and FAA reports I noticed my medical had expired last month all other documents were in effect and proper.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.