A flight instructor operating a cirrus SR20 reported a momentary loss of engine power indication.

Attributes
ACN	1309161
Time
Date	201511
Local Time Of Day	1801-2400
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Make Model Name	SR20
Operating Under FAR Part	Part 91
Flight Phase	Cruise
Flight Plan	IFR
Component
Aircraft Component	Engine Indications
Person 1
Function	Instructor
Qualification	Flight Crew Flight Instructor Flight Crew Commercial
Events
Anomaly	Aircraft Equipment Problem Critical

Narrative:

While on the VOR/DME-a approach; the engine power indication dropped to zero percent for a few seconds before returning to 75%. All other engine instrument indications were normal. Instructor contacted ATC and returned to [departure airport] via the arrival. No further engine indication abnormalities occurred during return flight.

Original NASA ASRS Text

Title: A flight instructor operating a Cirrus SR20 reported a momentary loss of engine power indication.

Narrative: While on the VOR/DME-A approach; the engine power indication dropped to zero percent for a few seconds before returning to 75%. All other engine instrument indications were normal. Instructor contacted ATC and returned to [departure airport] via the Arrival. No further engine indication abnormalities occurred during return flight.

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.