PA23 pilot reported he descended below his assigned altitude while troubleshooting a gyro failure.

Attributes
ACN	1427415
Time
Date	201702
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.TRACON
State Reference	US
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	PA-23-250 Aztec
Operating Under FAR Part	Part 91
Flight Phase	Initial Approach
Route In Use	Direct
Flight Plan	IFR
Component
Aircraft Component	Attitude Indicator(Gyro/Horizon/ADI)
Person 1
Function	Captain Pilot Flying Single Pilot
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Flight Instructor
Experience	Flight Crew Last 90 Days 45 Flight Crew Total 22000 Flight Crew Type 15
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Altitude Overshoot Deviation - Procedural Clearance

Narrative:

While being vectored for a visual; I was cleared to 3000 and descended to 2500 while trying to figure out a gyro failure which shut down my HSI; RMI; autopilot and flight director.....I was highly distracted!

Original NASA ASRS Text

Title: PA23 Pilot reported he descended below his assigned altitude while troubleshooting a gyro failure.

Narrative: While being vectored for a visual; I was cleared to 3000 and descended to 2500 while trying to figure out a gyro failure which shut down my HSI; RMI; Autopilot and Flight Director.....I was highly distracted!

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.