B767 flight crew reported horizontal situation indicator failure in flight.

Attributes
ACN	1751990
Time
Date	202007
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Aircraft 1
Make Model Name	B767-300 and 300 ER
Operating Under FAR Part	Part 121
Flight Phase	Cruise
Flight Plan	IFR
Component
Aircraft Component	Compass (HSI/ETC)
Person 1
Function	Relief Pilot First Officer
Qualification	Flight Crew Instrument Flight Crew Air Transport Pilot (ATP) Flight Crew Multiengine
Person 2
Function	Captain
Qualification	Flight Crew Instrument Flight Crew Air Transport Pilot (ATP) Flight Crew Multiengine
Events
Anomaly	Aircraft Equipment Problem Less Severe Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor

Narrative:

We had an uneventful preflight; just a little late for mx (maintenance); normal taxi and takeoff. In the final climb and level off at fl 370 the ca (captain's) HSI failed and we smelled electrical fumes. The HSI flickered for a little bit and went out with a bright flash in the screen. The ca turned over the plane to the first officer (first officer); and the ca and I were running the appropriate QRH (quick reference handbook) checklist for HSI failure and smoke; fumes and fire. I contacted dispatch and he acknowledged and he ask if we want to continue to ZZZ1. With the lack of evas (evacuations) and one his; we didn't feel comfortable to continue and dispatch ordered us to go back to ZZZ. After we explained to ATC our situation and intention to divert; ATC [gave us priority handling] and we landed with no further complications.

Original NASA ASRS Text

Title: B767 flight crew reported Horizontal Situation Indicator failure in flight.

Narrative: We had an uneventful preflight; just a little late for MX (Maintenance); normal Taxi and Takeoff. In the final climb and level off at FL 370 the CA (Captain's) HSI failed and we smelled electrical fumes. The HSI flickered for a little bit and went out with a bright flash in the screen. The CA turned over the plane to the FO (First Officer); and the CA and I were running the appropriate QRH (Quick Reference Handbook) checklist for HSI failure and Smoke; Fumes and Fire. I contacted Dispatch and he acknowledged and he ask if we want to continue to ZZZ1. With the lack of EVAS (Evacuations) and one HIS; we didn't feel comfortable to continue and Dispatch ordered us to go back to ZZZ. After we explained to ATC our situation and intention to divert; ATC [gave us priority handling] and we landed with no further complications.

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.