This specification covers the establishment of the minimum requirements for the design, testing, and quality assurance of fixed-pitch or ground adjustable propellers for light sport aircraft. The propeller may not have design features that have been shown to be hazardous or unreliable unless the suitability of each questionable design detail or part can be established by tests. Strength testing; stress measurement, fatigue strength, and fatigue analysis, endurance testing, and teardown inspection shall be performed to meet the requirements prescribed.This specification covers heavy-duty ranges that use gas or electrical heat sources, or both, for cooking food in the commercial and institutional food service establishments. Types: type I-electric range top with electric oven; type I-electric range top with gas-fired oven; type I-electric range top with storage base; type II-gas-fired range top with gas-fired oven; type II-gas-fired range top with electric oven; and type II-gas-fired range top with storage base. Electric ovens: electric standard oven and electric convection oven. Power: natural gas, propane, manufactured gas, and other gases. All ranges shall be provided with means to regulate the oven interior temperature and cook top burner heat. Oven thermostat test shall be performed to meet the requirements prescribed.