Craig, a voltage spike will trip the B&C crowbar and pop the field breaker. Since this happens when the hydraulic pumps comes on, I would look for something that would cause a voltage spike in that system. Loose wiring, relay going bad….
Craig Berland
N7VG
Dear Listers,
Recently, I completed my annual and test flew the airplane. Upon lifting the gear both primary and secondary alternator field breakers popped. Pushed them back in and all charging returned to normal on the primary and secondary alternators.
Landed, checked connections, put in a different battery, ran through B and C voltage regulator troubleshooting guide (came out normal) and did a ground run up. When lifting the flaps, hydraulic pump kicked on both field breakers popped again. Right now I am assuming it is the voltage regulator (both pri and sec are B and C), alternator , or a connector.
Anyone have similar issues and can recommend the next course of action?
Thank you,
Craig Gainza
IV-P TSIOF 550
782 hours and holding