Incident Summary
During a training flight, the instructor pilot (CFI) simulated a loss of power in the right engine while the student was making an approach. The CFI then pulled the circuit breaker for the normal gear extension system. The student attempted to extend the gear using the alternate system, but the left gear did not lock down. The CFI reset the circuit breaker and recycled the landing gear, but the left gear still did not indicate down and locked.
Go-Around and Power Loss
The CFI ordered a go-around, which was initiated at about 300 feet above ground level. When the throttles were advanced, the CFI noted a lack of power in the right engine and took control of the aircraft. He attempted to restore full power to the right engine, which he perceived was producing some power. The propeller was not feathered.
Forced Landing
In that configuration, the aircraft maintained level flight but would not climb. Subsequently, it began to descend, and the CFI executed a forced landing on rough desert terrain.
Investigation
During the subsequent investigation, no reason for the reported loss of engine power was found.