TRACON controller reported they were late vectoring an aircraft from downwind to base leg and the ai...

Narrative:

Aircraft X was an IFR overflight requesting a practice approach. I had a handful of other aircraft at the time but traffic volume was not a factor. While I had aircraft X on a downwind heading I was also checking a full route clearance for another aircraft to ensure it was good. This resulted in a late turn to base. I realized I had an MVA (minimum vectoring altitude) issue; so I climbed aircraft X to 8;000 ft. After doing to the low altitude alarm went off; but because I had already issued a climb I did not issue a low altitude alert. Because there is terrain along the final approach course that requires precise altitude control and base turns; I should avoid getting caught up in other duties until I have turned aircraft base; especially for fast moving aircraft.

Original NASA ASRS Text

Title: TRACON Controller reported they were late vectoring an aircraft from downwind to base leg and the aircraft flew below the Minimum Vectoring Altitude.

Narrative: Aircraft X was an IFR overflight requesting a practice approach. I had a handful of other aircraft at the time but traffic volume was not a factor. While I had Aircraft X on a downwind heading I was also checking a full route clearance for another aircraft to ensure it was good. This resulted in a late turn to base. I realized I had an MVA (Minimum Vectoring Altitude) issue; so I climbed Aircraft X to 8;000 ft. After doing to the low altitude alarm went off; but because I had already issued a climb I did not issue a low altitude alert. Because there is terrain along the final approach course that requires precise altitude control and base turns; I should avoid getting caught up in other duties until I have turned aircraft base; especially for fast moving aircraft.

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	1742432
Time
Date	202005
Local Time Of Day	0001-0600
Place
Locale Reference	U90.TRACON
State Reference	AZ
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	Military
Flight Phase	Initial Approach
Route In Use	Vectors
Flight Plan	IFR
Person 1
Function	Approach
Qualification	Air Traffic Control Fully Certified
Experience	Air Traffic Control Time Certified In Pos 1 (yrs) 5
Events
Anomaly	ATC Issue All Types Deviation - Procedural Clearance Deviation - Track / Heading All Types Inflight Event / Encounter CFTT / CFIT

TRACON controller reported they were late vectoring an aircraft from downwind to base leg and the aircraft flew below the minimum vectoring altitude.