M20J pilot reported loss of oil pressure and propeller control.

Attributes
ACN	1760274
Time
Date	202009
Local Time Of Day	1801-2400
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	Mixed
Light	Night
Aircraft 1
Make Model Name	M-20 J (201) / Allegro
Operating Under FAR Part	Part 91
Flight Phase	Cruise
Route In Use	Direct
Flight Plan	IFR
Component
Aircraft Component	Powerplant Lubrication System
Person 1
Function	Pilot Flying Single Pilot
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Flight Instructor Flight Crew Instrument Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 100 Flight Crew Total 4000 Flight Crew Type 50
Events
Anomaly	Aircraft Equipment Problem Critical

Narrative:

Experienced a sudden loss of oil pressure and uncontrollable propeller RPM resulting in propeller overspeed. Partial power was used to maintain safe RPM by reducing throttle to keep rpms in limit. An [expedited] landing was made at ZZZ.

Original NASA ASRS Text

Title: M20J pilot reported loss of oil pressure and propeller control.

Narrative: Experienced a sudden loss of oil pressure and uncontrollable propeller RPM resulting in propeller overspeed. Partial power was used to maintain safe RPM by reducing throttle to keep RPMs in limit. An [expedited] landing was made at ZZZ.

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.