M20 pilot reported an immediate return for landing after observing oil spray on the windscreen after...

Attributes
ACN	1523533
Time
Date	201803
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Tower
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	M-20 F Executive 21
Operating Under FAR Part	Part 91
Flight Phase	Takeoff
Flight Plan	None
Person 1
Function	Single Pilot Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 200 Flight Crew Total 11500 Flight Crew Type 600
Events
Anomaly	Aircraft Equipment Problem Less Severe

Narrative:

Post maintenance flight for annual. Preflight and runup [per] operating manual and fars. I had briefed local controller that this was post maintenance flight and I wanted to climb above pattern altitude and exercise engine and prop while remaining with tower. Discreet squawk given and approved. At gear retraction (manual) small amount of oil spray began hitting right windscreen. I elected to land and tower cleared me to land any runway. No other aircraft in the pattern and winds light and variable. I turned downwind; lowered gear; checks complete and landed. Assume a bit of oil was smoking on hot cylinders so secured engine and electrical on rollout and called for aircraft rescue and firefighting (arff) as precaution. Exited taxiway 'F' and exited aircraft. Aircraft rescue and firefighting was there quickly and determined no further assistance required. Aircraft towed back to maintenance ramp.

Original NASA ASRS Text

Title: M20 pilot reported an immediate return for landing after observing oil spray on the windscreen after takeoff.

Narrative: Post maintenance flight for annual. Preflight and runup [per] operating manual and FARs. I had briefed LOCAL controller that this was post maintenance flight and I wanted to climb above pattern altitude and exercise engine and prop while remaining with tower. Discreet squawk given and approved. At gear retraction (manual) small amount of oil spray began hitting right windscreen. I elected to land and tower cleared me to land any runway. No other aircraft in the pattern and winds light and variable. I turned downwind; lowered gear; checks complete and landed. Assume a bit of oil was smoking on hot cylinders so secured engine and electrical on rollout and called for aircraft rescue and firefighting (ARFF) as precaution. Exited Taxiway 'F' and exited aircraft. Aircraft rescue and firefighting was there quickly and determined no further assistance required. Aircraft towed back to maintenance ramp.

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.