B767 Undifferentiated or Other Model
Flight Crew Air Transport Pilot (ATP); Flight Crew Flight Instructor; Flight Crew Multiengine; Flight Crew Instrument
Distraction; Time Pressure
Aircraft Equipment Problem Less Severe; Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor
Flight Crew Overcame Equipment Problem
Aircraft
While in cruise enroute to ZZZ; the Captain side Attitude Direction Indicator (ADI) went blank. After a minute or so; I heard a crackling type sound and noticed a very strong electrical odor. A mechanic was on board and noticed that the ADI breaker had popped; so logically we left it out and I transferred control to the First Officer; and I became pilot monitoring.When we noticed the odor; we re-checked our oxygen masks and I briefed the FO (First Officer) that if we see smoke of any kind; we were to don the mask and goggles; establish communications; and proceed to the nearest suitable airport. Since we knew the likely source of the odor and it had dissipated; I elected to continue the flight without declaring an emergency. I kept the cockpit bright to detect any smoke until below 10;000 feet MSL on the way in to ZZZ.Furthermore; I opened the QRH to the smoke; fire and fumes checklist and briefed it just in case the problem returned. Also; the FO and I agreed upon the nearest suitable airport as we progressed along the route in the event of a smoke/fire emergency so no time would be wasted getting on the ground. Again; with the breaker popped and no more odor; I deemed it safe to continue with robust contingency planning along the route.As we descended into ZZZ; the Captain side HSI began to flicker on and off. Not knowing if this was a related issue; I immediately instructed the mechanic to find and pull the breaker. He did so; and we landed without incident in ZZZ without my primary displays.During flight after the ADI breaker popped; the mechanic decided to closely scrutinize the aircraft maintenance log. He found that days earlier; the Captain's 'ND' (technically HSI on the 767) had been written up by the crew because it was flickering. The corrective action was to replace the ADI - the incorrect display; which was ultimately the one that failed on our flight.
B767 Captain reported electrical odor and multiple navigation equipment failures.