Cessna 210 Centurion / Turbo Centurion 210C; 210D
Flight Crew Flight Instructor; Flight Crew Multiengine; Flight Crew Instrument; Flight Crew Commercial
Flight Crew Last 90 Days 83; Flight Crew Total 6089; Flight Crew Type 224
Aircraft Equipment Problem Critical
Flight Crew Landed in Emergency Condition; Flight Crew Returned To Departure Airport
Aircraft
Departed ZZZ on a training flight to ZZZ1. At 5;000 ft MSL during the climb the Pilot Flying noted that at full throttle the MP (Manifold Pressure) read 25 in Hg. The plane was properly configured for cruise climb and all other instruments were reading normal. We suspected an issue with the turbo charger and notified ATC that we would like to return to ZZZ due to a loss of Manifold Pressure. ATC provided priority handling and vectored us for the RNAV approach. We landed at ZZZ without incident.The maintenance shop at ZZZ investigated the problem and found a pin-hole leak in the line between the pressure transducer and the Manifold Pressure Gauge. They replaced the line and the gauge now shows the proper Manifold Pressure.
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Flight Instructor flying C210T aircraft reported problem with engine instruments inflight that resulted in an air return.