Single Engine Turboprop Undifferentiated
Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 11
Communication Breakdown
ATC Issue All Types; Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy; Inflight Event / Encounter CFTT / CFIT; Inflight Event / Encounter Weather / Turbulence
Airspace Structure; Chart Or Publication; Weather; Procedure; Human Factors
I cleared Aircraft X for the ILS approach into IDA and informed the pilot of the 1200 RVR. 1 minute from WOTES the pilot told me he needed 2400 RVR and would need to hold. I issued holding at WOTES at 080 and the pilot read it back. No turn direction was issued as the pilot is expected to make standard right turns. 2 minutes later Aircraft X began a left turn and clipped a terrain box. A climb to 090 was issued.Recommendation - State turn directions if needed.
ZLC Center Controller reported an aircraft on the ILS approach to IDA airport entered holding with left turns instead of right turns and flew below the Minimum Vectoring Altitude.