Incident Description
During an instructional flight conducting an ILS approach, a total loss of engine power occurred at approximately 1200 feet above ground level. The private pilot receiving instrument instruction was flying the aircraft, while the certified flight instructor attempted an engine restart. A forced landing was made onto rough terrain. During the landing roll, the nose gear separated from the aircraft.
Pilot Familiarity
Neither the private pilot nor the flight instructor were familiar with the fuel boost pump procedures for inflight engine failures. The aircraft type certificate requires a placard addressing procedures for engine failure; this placard was absent. The fuel boost switch was left in the off position.
Aircraft Examination
Examination of the aircraft revealed contamination in the gascolator and the fuel flow divider. Additionally, a 60% obstruction due to contaminants was present in the fuel air control unit screen. Three spark plugs were fouled: two due to oil fouling and one due to carbon fouling.