GA-7 pilot reported altitude deviation during ILS approach that caused an ATC low altitude alert.

Attributes
ACN	1690340
Time
Date	201910
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	IMC
Aircraft 1
Make Model Name	GA7-Cougar
Operating Under FAR Part	Part 91
Flight Phase	Initial Approach
Flight Plan	IFR
Person 1
Function	Single Pilot Pilot Flying
Qualification	Flight Crew Instrument Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 60 Flight Crew Total 4500 Flight Crew Type 4000
Events
Anomaly	Deviation - Altitude Excursion From Assigned Altitude Deviation - Procedural Clearance Deviation - Procedural Published Material / Policy Inflight Event / Encounter CFTT / CFIT
Miss Distance	Vertical 300

Narrative:

I was flying the ILS to ZZZ. While turning to intercept the localizer; I inadvertently descended approximately 350 ft. Below my assigned altitude. Approach gave me a low altitude alert and I climbed back to proper altitude and completed the approach.

Original NASA ASRS Text

Title: GA-7 Pilot reported altitude deviation during ILS approach that caused an ATC low altitude alert.

Narrative: I was flying the ILS to ZZZ. While turning to intercept the LOC; I inadvertently descended approximately 350 ft. below my assigned altitude. Approach gave me a Low Altitude Alert and I climbed back to proper altitude and completed the approach.

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.