A center controller observed a glider on an IFR flight plan descend below the minimum IFR altitude.

Attributes
ACN	1386345
Time
Date	201609
Local Time Of Day	1201-1800
Place
Locale Reference	ZLC.ARTCC
State Reference	UT
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Sail Plane
Operating Under FAR Part	Part 91
Flight Phase	Climb
Route In Use	None
Flight Plan	IFR
Person 1
Function	Enroute
Qualification	Air Traffic Control Fully Certified
Experience	Air Traffic Control Time Certified In Pos 1 (yrs) 6
Events
Anomaly	ATC Issue All Types Deviation - Altitude Excursion From Assigned Altitude Deviation - Procedural Clearance Inflight Event / Encounter CFTT / CFIT

Narrative:

Aircraft X called me airborne looking for [an] IFR clearance. I identified him and insured he was above my minimum IFR altitude (mia). I gave him the clearance to climb to 18;000 feet. I later gave him a clearance to maintain the block 16;000 feet thru 20;000 feet. He climbed through 12;000 feet and then. My mia in the area is 10;900 feet. I had other things going on in the sector and when I checked on him again he was then descending through my mia and was at 10;200 feet. I gave him a low altitude alert and he began climbing again. I assume he had issues maintaining a climb because he was a glider. He never told me he was descending or having any issues. [Suggest] educate gliders they abide by IFR rules if they are on an IFR flight plan.

Original NASA ASRS Text

Title: A Center Controller observed a Glider on an IFR flight plan descend below the Minimum IFR Altitude.

Narrative: Aircraft X called me airborne looking for [an] IFR clearance. I identified him and insured he was above my Minimum IFR Altitude (MIA). I gave him the clearance to climb to 18;000 feet. I later gave him a clearance to maintain the block 16;000 feet thru 20;000 feet. He climbed through 12;000 feet and then. My MIA in the area is 10;900 feet. I had other things going on in the sector and when I checked on him again he was then descending through my MIA and was at 10;200 feet. I gave him a low altitude alert and he began climbing again. I assume he had issues maintaining a climb because he was a glider. He never told me he was descending or having any issues. [Suggest] educate gliders they abide by IFR rules if they are on an IFR flight plan.

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.