Incident Details
The purpose of the flight was for the pilot-in-command (PIC) to obtain a multi-engine add-on rating. During a two-engine go-around, the designated pilot examiner (DPE) simulated an engine failure by retarding the left throttle. Shortly thereafter, the airspeed decreased, and the PIC advised the DPE that he was unable to maintain altitude or attitude. The left throttle was readvanced with no apparent effect. The PIC was unable to restore power in the left engine and relinquished flight controls to the DPE.
Approach and Landing
The aircraft was prepared for an approach to the airport. With the left engine and hydraulic system inoperative, the PIC used the manual hand pump to operate the landing gear and flaps, after ensuring the aircraft would clear obstacles. He continued pumping, but the aircraft was forced to land short of the runway. During touchdown, the nose gear collapsed before it was fully extended. The wing flaps were found extended.
Hydraulic System Operation
The landing gear and wing flaps operated from the same hydraulic system; either could have been actuated independently of the other. The hydraulic system was built so that when the gear and flaps were engaged at the same time, the gear would complete its operation before the flaps operated.
Investigation Findings
No reason was found for the loss of power in the left engine.