A professional who assists other workers engaged in servicing, repairing, and overhauling aircraft and aircraft engines, performing any combination of following duties. Respnsibilities include:

• Replaces batteries, filters, and similar accessories, using mechanic's handtools.
• Removes inspection plates, cowling, engine covers, floor boards, and related items, to permit access for repair or inspection, and replaces items upon completion of work.
• Assists airframe-and-power-plant mechanic in dismantling, repairing, overhauling, or replacing parts and assemblies, such as engines, plumbing and hydraulic systems, and aircraft structural sections.
• Cleans aircraft interior and exterior parts and assemblies with solvents or other cleaning solutions.
• Inflates tires, fills gasoline tanks and oil reservoirs, and greases aircraft, using grease gun.
• May assist manufacturing facility flight line personnel in servicing and repairing aircraft prior to flight or customer acceptance and be designated Flight Line Service Attendant.
• Performs other duties as described under helper master title.