Electrical problems
R44 Raven II with less than 200 Hours is an electrical nightmare. Intermittent illumination of the fuel filter light in flight and on the ground during cool down. Cleaned the gascolator screen and the fuel servo inlet screen(no contamination), problem still exists. Talked with Robinson and they said they had problems with earlier revision vacuum switches in the gascolator, but we have the latest and greatest switch. Got a new one and that problem seems to be fixed. Cyl head temp readings occasionally fluctuating from dead zero to pegged out and any where in between. Checked wiring harness from stem to stern, found no problem. Seems to have fixed itself for now. Rotor tach readings tend to fritz out from time to time in flight and doing pre flight run ups. Checked points in mag and associated wiring. Found a shielded wire nicked at a connector that may have been grounding out. Fixed wiring and problem went away...and comes back and goes away. This aircraft is a lemon. And Robinson wiring diagrams suck. Too much info on one page. How bout splitting up systems so I don't go blind trying to fix a problem.