Chancellor 414A / C414
Flight Crew Commercial; Flight Crew Instrument; Flight Crew Multiengine
Flight Crew Last 90 Days 60; Flight Crew Total 1270; Flight Crew Type 275
Situational Awareness
Aircraft Equipment Problem Critical
Flight Crew Inflight Shutdown; Flight Crew Returned To Departure Airport; Flight Crew Landed in Emergency Condition; General Maintenance Action
Aircraft
Departed [in the morning] on a clear VFR day. I was performing a maintenance check [flight] to break in a new left engine that had been installed on the aircraft. After leveling out at 8;500 feet and 10 miles from the airport the right engine started losing power; at this point I instantly turned back to the airport. I communicated to Approach Control that I was having a maintenance issue and needed to return to the field and was not declaring an emergency. Before the engine reached 2;000 rpm's the engine was shutdown in accordance with the emergency procedure checklist. Communicated Approach Control at this time I was single engine and still was not declaring an emergency; I landed the plane safely. Found oil coming out of the right engine cowling; the maintenance shop found the prop accumulator had blown open.
C414 pilot reports a loss of power in the right engine during a maintenance test flight for a newly installed left engine. The engine is shut down and the flight returns to the departure airport.