ARTCC instructor and developmental controllers reported a communication breakdown that caused an IFR...

Narrative:

Aircraft X was level flight FL110. At xa:07Z I issued cleared direct dsd VOR track outbound on the procedure turn descend and maintain 090. Aircraft X read back clearance but I went back and reissued after dsd track outbound on the VOR a approach. Aircraft X read this back correctly. At xa:15Z aircraft X reported established on the approach (5.76 miles west of dsd) I told him 'roger I'll have clearance shortly; descend and maintain 8;000 ft.' at 6.22 miles from dsd. At xa:19Z my trainer confronted aircraft X about whether he knew he needed to remain within 10 miles of dsd per the approach; aircraft X said he was aware and that he was waiting for his clearance. She then explained he was supposed to fly the procedure turn as published but maintain 8;000. He responded with ok and that he's making the turn inbound. At 13.7 miles out from dsd my instructor instructed aircraft X to climb to 110 for terrain; no delay in the climb. He acknowledged. Aircraft X was at 8;000 ft. In a 9;000 ft. Mia outside the boundaries of the approach. I should have issued the climb right away instead of waiting once we knew he was outside the 10 mile parameter of dsd. Also we should have issued a terrain alert. I believe this is a pilot deviation; but we could have issued the climb and safety alert sooner.

Original NASA ASRS Text

Title: ARTCC Instructor and Developmental controllers reported a communication breakdown that caused an IFR aircraft to fly below the sector minimum IFR altitude.

Narrative: Aircraft X was level flight FL110. At XA:07Z I issued cleared direct DSD VOR track outbound on the procedure turn descend and maintain 090. Aircraft X read back clearance but I went back and reissued after DSD track outbound on the VOR A approach. Aircraft X read this back correctly. At XA:15Z Aircraft X reported established on the approach (5.76 miles west of DSD) I told him 'roger I'll have clearance shortly; descend and maintain 8;000 ft.' at 6.22 miles from DSD. At XA:19Z my trainer confronted Aircraft X about whether he knew he needed to remain within 10 miles of DSD per the approach; Aircraft X said he was aware and that he was waiting for his clearance. She then explained he was supposed to fly the procedure turn as published but maintain 8;000. He responded with ok and that he's making the turn inbound. At 13.7 miles out from DSD my instructor instructed Aircraft X to climb to 110 for terrain; no delay in the climb. He acknowledged. Aircraft X was at 8;000 ft. in a 9;000 ft. MIA outside the boundaries of the approach. I should have issued the climb right away instead of waiting once we knew he was outside the 10 mile parameter of DSD. Also we should have issued a terrain alert. I believe this is a pilot deviation; but we could have issued the climb and safety alert sooner.

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.

Attributes
ACN	1689995
Time
Date	201910
Local Time Of Day	0001-0600
Place
Locale Reference	ZSE.ARTCC
State Reference	WA
Aircraft 1
Make Model Name	S-70/UH-60 Blackhawk/Seahawk/Pavehawk/Knighthawk
Operating Under FAR Part	Part 91
Flight Phase	Cruise
Flight Plan	IFR
Person 1
Function	Trainee Enroute
Qualification	Air Traffic Control Developmental
Person 2
Function	Enroute Instructor
Qualification	Air Traffic Control Fully Certified
Events
Anomaly	ATC Issue All Types Deviation - Procedural Published Material / Policy Deviation - Procedural Clearance Deviation - Track / Heading All Types Inflight Event / Encounter CFTT / CFIT

ARTCC instructor and developmental controllers reported a communication breakdown that caused an IFR aircraft to fly below the sector minimum IFR altitude.