<< >> NASA ASRS Report 1550048, June 2018

SR20 pilot receiving instruction reported returning to departure airport after experiencing engine roughness.

Attributes
ACN	1550048
Time
Date	201806
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.TRACON
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	SR20
Operating Under FAR Part	Part 91
Flight Phase	Cruise
Route In Use	None
Component
Aircraft Component	Engine
Person 1
Function	Pilot Flying Trainee
Qualification	Flight Crew Commercial
Events
Anomaly	Aircraft Equipment Problem Critical

Narrative:

When climbing out; all engine indications were normal. Upon reaching our first assigned altitude of 2;000 feet; flight crew noticed [an abnormal] sound followed by very rough vibrations/roughness when power was set to cruise. The instructor kept monitoring the systems and told [me] to keep flying [the] assigned heading. ATC then told us to climb to 4;000 feet; as we climbed vibrations were reduced but worsened as we leveled off. Instructor then noticed that the oil pressure was not stable; fluctuating around 5-11 psi. Ip (instructor pilot) thought it might be the governor and told ATC we [want to] return. ATC asked of the issue. The vibrations worsened; ip stayed at 4;000 feet until we were positioned close enough to glide to [the airport] worst case. When initiating a shallow descent vibrations worsened all throughout approach to landing.

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Original NASA ASRS Text

Title: SR20 pilot receiving instruction reported returning to departure airport after experiencing engine roughness.

Narrative: When climbing out; all engine indications were normal. Upon reaching our first assigned altitude of 2;000 feet; flight crew noticed [an abnormal] sound followed by very rough vibrations/roughness when power was set to cruise. The Instructor kept monitoring the systems and told [me] to keep flying [the] assigned heading. ATC then told us to climb to 4;000 feet; as we climbed vibrations were reduced but worsened as we leveled off. Instructor then noticed that the oil pressure was not stable; fluctuating around 5-11 PSI. IP (Instructor Pilot) thought it might be the governor and told ATC we [want to] return. ATC asked of the issue. The vibrations worsened; IP stayed at 4;000 feet until we were positioned close enough to glide to [the airport] worst case. When initiating a shallow descent vibrations worsened all throughout approach to landing.

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.