This month’s questions for the tech come from the pilot of a vintage twin Cessna with Continental IO-470 engines. A gear-up landing required engine teardown and ever since, one engine developed attention-getting oil pressure fluctuations. IA Mike Berry helps sort it out. And, a Mooney owner battles GPS navigator reception problems, and Larry Anglisano points the troubleshooting in the right direction. First, the oil pressure trouble.
Upon cold startup, the engines’ oil pressure goes to the upper middle of the green, nice and quick.