Charging Problem/ Gear problem
I finally got my charging problem fixed after chasing it for 1.5 years. The problem was intermittant lights blinking, front & rear charge lights blinking. And landing gear not locking down at times. We had replaced, all 3 contacter, large & small diodes, large capacitors, battery, checked for loose wires & voltage drops across circuit breakers. Replace 1 lord coupler on alternator. We also changed both voltage regulators. We installed a new parrallel regulator system. The way we found the problem is the rear alternator finally totally failed. The brushes where hanging up. This also made the gear problem. On a 337H you have a power pack gear pump that demands a lot of power at the end of the gear down cycle. At that moment the rear alternator would stop putting out. Also I was down wind on landing, so the engines where at very low RPM. Not giving out enough power to complete gear down cycle.
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