Pc-12 first officer reported that engine indication problems led to a return to the departure airpor...

Attributes
ACN	1552173
Time
Date	201806
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.ARTCC
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	PC-12
Operating Under FAR Part	Part 135
Flight Phase	Cruise
Route In Use	Direct
Flight Plan	VFR
Component
Aircraft Component	Engine
Person 1
Function	Pilot Not Flying First Officer
Qualification	Flight Crew Multiengine Flight Crew Instrument Flight Crew Flight Instructor Flight Crew Commercial
Experience	Flight Crew Total 1130 Flight Crew Type 450
Events
Anomaly	Aircraft Equipment Problem Critical

Narrative:

In cruise flight the aircrafts RPM's were shown to drop from 1;750 to 1;450. There was no indication of loss of engine performance but had indications of a slow decrease we [advised ATC] and turned back to ZZZ airport. Upon short approach we noticed that the torque was indicating 0.0. Landed safely with no other problems.

Original NASA ASRS Text

Title: PC-12 First Officer reported that engine indication problems led to a return to the departure airport.

Narrative: In cruise flight the aircrafts RPM's were shown to drop from 1;750 to 1;450. There was no indication of loss of engine performance but had indications of a slow decrease we [advised ATC] and turned back to ZZZ airport. Upon short approach we noticed that the torque was indicating 0.0. Landed safely with no other problems.

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.

Pc-12 first officer reported that engine indication problems led to a return to the departure airport.